List of the tags used for the puzzles

Tag name Category # Puzzles
2D array FUNDAMENTALS 57 Squares order     Minesweeper     Sandpile addition     n Queens     Hitori solver     1010(1)     Magic Square     Count of Primes in a number grid     Dominoes solver     Dumbbells solver     Number of paths between 2 points     Lumen     Forest Fire     Battleship     Coders of the Realm - 1v1     Coders of the Realm     TicTacToe     Rock-Paper-Scissors War     Sudoku Validator     A Game of Go     Spring Challenge 2020     The lost child.Episode-1     Chess board analyzer     Dungeons and Maps     Flip The Sign     Reverse Minesweeper     Custom Game of Life     Can you save the forest - Episode 1     Substitution Encoding     Object Insertion     Folding a Note     Wave Function Collapse (sans Shannon)     Minesweeper level generator     Block the spreading fire !     Largest Binary Rectangle     Rotating arrows     No More Pythons, Please!     Crop-Circles     Constrained Latin Squares     Character replacement problem     The logo beyond C++ and C#     Killer Sudoku Solver     Make an Atari Font     Picture Puzzle     Tiny Forest     Tile a Floor     Word Search for Programmers     Tile a Floor Differently     Couple's Picture-Frame     Digital Scoreboard     Popularity of each activity     Square Spiral for Alien Contact 👽     Mosaic     Triangle Toggle     Boggle with Friends     Odd-Quad-Out     Scrabble score    
3D ADVANCED 6 Detective Pikaptcha EP4     Blockout     Let's make a cheap ASCII 3D engine!     Dice Duel     ASCII cube     3D printer    
5% 2 TryAngle Catch     Dice Duel    
A* ADVANCED 4 A-star exercise     11-puzzle     Jump Point Search - Preprocessing     Jump Point Search - Runtime    
Abstraction 2 Derivative time !!! - part1     Derivative time !!! - part2    
Algebra FUNDAMENTALS 6 Quaternion Multiplication     Expand the polynomial     Jumping Frogs     24 Game     Body weight is a girl's secret     Conditional probabilities    
Algorithm X 1 25x25 Sudoku    
AM/PM 1 Railway Station Clock    
anagram 1 anagram to break the code !    
angle FUNDAMENTALS 2 Windmill problem     WW2 Mortar Warfare    
Arithmetic FUNDAMENTALS 30 Sum of divisors     Simple fraction to mixed number     Carmichael numbers     Divide the factorial     Balanced ternary computer: encode     Execution Circle     Highest truncated pyramid     The River II.     Magic count of numbers     Polydivisible number     De-FizzBuzzer     ISBN Check digit     Factorials of primes decomposition     The Total is Right - Weird edition     Remainder Fantasy     Flower beds     Number derivation     Nuggets numbers     Divisibility of Fibonacci numbers sum     Railway Station Clock     Cooking passion     24 Game     Buzzle     Holey Times     N Pearls Necklace     Running Up That Hill     Crazy List     24: The Long Game     Solve for X     Odd-Quad-Out    
Arithmetics FUNDAMENTALS 0
Array forbidden 1 Graffiti on the fence    
Arrays FUNDAMENTALS 37 Temperatures     ASCII Art     Stock Exchange Losses     Temperatures     Monday Tuesday Happy Days     Simple Awalé     Bingo!     Pirate's treasure     Equalizing arrays     Rectangle Partition     Rock Paper Scissors Lizard Spock     Unique Prefixes     Inversion count     Nurikabe     Fractal Image Recognition     Binary image     Personal Best     Detective Geek     Treasure hunt     FireControl     Self Checkout Machine     Genetics and Computers     10 pin Bowling Scores     Snail Run     The broken editor     Tennis score     Artificial Emotional Intelligence     Merlin's Magic Square     abcdefghijklmnopqrstuvwxyz     Max Area     Shoot Enemy Aircraft     ASCII Art - Code Golf     The helpdesk     The leaking bathtub     NATO-alphabet's odd uncles     Count your coins     Advertisements    
ascii 1 Hidden Messages In Images    
Ascii Art INTERMEDIATE 45 May the Triforce be with you!     ASCII ART : Glass Stacking     Vortex     Self-driving car testing     Cards castle     Highest truncated pyramid     Ghost Legs     Propositions in Frege’s ideography     Crossword     7-segment scanner     Particle Detection with Cloud Chamber     Mountain Map     Let's make a cheap ASCII 3D engine!     Mountain Map Convergence     Longest Road     ASCII cube     Shadow Casting     Where's Wally     L-triominoes     Holey Times     Join the Dots     No More Pythons, Please!     Scary Ride at the Haunted Mansion     Cubic Bézier curves     Bouncing Barry     Retro Typewriter Art     Crop-Circles     Level of nested parentheses     Ulam Spiral     The logo beyond C++ and C#     Create 'Turn Here' Signs     Make an Atari Font     ASCII Art with Logo Language     |Build A Bookcase|🔨     Picture Puzzle     ASCII Art QR code     ASCII Art with Logo Language, Part 2     Identify a simple shape     ASCII Art The Drunken Bishop Algorithm     Tile a Floor     How many triangles and rectangles?     Tile a Floor Differently     Couple's Picture-Frame     Digital Scoreboard     Triangle Toggle    
automates 1 circular automation, the period of chaos    
Autoscaling 1 Simple auto-scaling    
Average FUNDAMENTALS 1 Dolbear's Law    
Backtracking ADVANCED 23 The Bridge     The Fall - Episode 2     The Fall - Episode 3     There is no Spoon - Episode 2     Winamax Sponsored Contest     Ticket to Ride: Europe     Neighbor-Sum Grids     Sudoku Solver     Surakarta     Futoshiki Solver     Kakuro Solver     Three little piggies     the voucher     Constrained Latin Squares     Hexagonal Maze - part2     Suguru Solver     Fix the spaces     The Fall - Episode 3 - Code Golf     The Bridge - Code Golf     The Fall - Episode 2 - Code Golf     16x16 Sudoku     25x25 Sudoku     Number Partition    
Ballistics 1 Legendary Archer Octavius    
barcode INTERMEDIATE 0
Barycenters INTERMEDIATE 1 Power of Thor - Episode 2    
Base conversion 1 Make an Atari Font    
Beam Search ADVANCED 6 Search Race     SameGame     2048     Can you save the forest - Episode 1     Can you save the forest - Episode 2     RUSH HOUR    
Bezier Curves 1 Cubic Bézier curves    
Bezout's identity ADVANCED 1 Jumping Frogs    
BFS ADVANCED 29 Death First Search - Episode 1     The Labyrinth     Surface     2.5D maze     Hypersonic     Flood fill Example     Paper labyrinth     Locked in gear     The lost child.Episode-1     English length units conversion     Sokoban     Fall Challenge 2020     Cooperative Mate with Rook     Train passenger     Catching Up     River Crossing     Hexagonal Maze     Moves in maze     Lunar Lockout     RUSH HOUR     Maze /w teleporters and jumps     Longest coast     abcdefghijklmnopqrstuvwxyz     Hexagonal Maze - part2     The Labyrinth - Code Golf     Surface - Code Golf     The Other Side     Periodic table spelling     Six Degrees of Kevin Bacon    
Bin packing ADVANCED 3 ASCII Art QR code     ASCII Art The Drunken Bishop Algorithm     Bin packing    
Binary 1 Duo combinations    
Binary representation 1 Binary Sequence    
Binary search ADVANCED 5 Shadows of the Knight - Episode 1     Shadows of the Knight - Episode 2     Binary Extension     Shadows of the Knight - Episode 2 - Code Golf     Shadows of the Knight - Episode 1 - Code Golf    
Binary Tree ADVANCED 4 Rational Number Tree     Binary Search Tree Traversal     Tree Paths     Binary Tree Visual    
Bitboarding ADVANCED 9 Breakthrough     Othello     Clobber     Amazons     Lines Of Action     Merlin's Magic Square     Impasse     Make an Atari Font     Mad Knights    
bitwise 1 Hidden Messages In Images    
Blood Types 1 Blood Types    
Board Game 1 Isola    
bot-programming 1 Clash of Bots    
brainfuck 1 What the Brainfuck !    
Breadth First Search 1 Six Degrees of Kevin Bacon    
Bresenham's algorithm ADVANCED 1 Cultist Wars    
Brute-force INTERMEDIATE 17 Vox Codei - Episode 1     Vox Codei - Episode 2     Near-Palindromes     Depot organization     The Total is Right - Weird edition     Hooch Clash     Smooth!     Kakuro Solver     Lost astronaut     Three little piggies     All Operations are Equal!     Picture Puzzle     Wordle     Vox Codei - Episode 2 - Code Golf     Vox Codei - Episode 1 - Code Golf     BobTheScience and the Food Stack     Rummikub 1    
Bruteforce 1 SPORE City Planner    
Byte-pair 1 Byte pair encoding    
Card game 0
Card games 9 Legends of Code & Magic     Legends of Code & Magic: Constructed     Green Circle     6 nimmt! / 6 qui prend! / Take 5!     Blackjack solver     Card Counting when easily distracted     One for his Nobs     Score a Bridge deal     Poker    
Cards 1 🃏 FreeCell 🃏    
CG Funge 1 CGFunge Prime    
chaos 1 circular automation, the period of chaos    
Chars 1 Artificial Emotional Intelligence    
Chebyshev distance 1 Sweet spot    
Check-digit FUNDAMENTALS 4 ISBN Check digit     Credit Card Verifier (Luhn’s algorithm)     Barcode scanner     Tricky Number Verifier    
chess 12 Harmless Rooks     Rooks Movements     Knights Jam     Chess board analyzer     Chess     Is the King In Check? (Part 1)     Cooperative Mate with Rook     Is the King In Check? (Part 2)     Adversarial Mate with Rook     Queen control     Minishogi     Dice Shogi    
Chocolate 1 Goro Want Chocolate    
cinematics 1 Asteroids    
Cipher ADVANCED 2 Hacking at RobberCity     Caesar is the chief    
Classic board games 0
Clock 1 Railway Station Clock    
clustering 1 Virus spreading and clustering    
Collision Detection ADVANCED 3 Darts     Snooker Ball Collision     The flight of birds    
Combination puzzle ADVANCED 3 Knights Jam     One for his Nobs     Mind Cracker    
Combinations 1 Kids Blocks    
Combinatorics ADVANCED 14 OneWay City     Count as I count     Bulls and Cows 2     Map Colorations     Kakuro Solver     if then else     Prime Fractals in Pascal's Triangle     Wave Function Collapse (sans Shannon)     Constrained Latin Squares     Team Building     Wordle     Duo combinations     Count as I count #2     Poker    
Compiler 1 Ted's compiler    
Complex 1 Euclid's algorithm with complex numbers    
Complex Numbers 1 Mandelbrot Set Approximation    
Complexity INTERMEDIATE 1 Chained Matrix Products    
Compression ADVANCED 5 Ancestors & Descendants     Paper labyrinth     Huffman Code     Byte pair encoding     Fax machine    
Computer graphics 1 Cubic Bézier curves    
Condition FUNDAMENTALS 0
Conditions FUNDAMENTALS 66 Power of Thor - Episode 1     Temperatures     Unary     MIME Type     The Fall - Episode 1     Stock Exchange Losses     Scrabble     Mars Lander - Episode 1     Onboarding     Don't Panic - Episode 1     Don't Panic     Power of Thor     Temperatures     Squares order     Othello     Minesweeper     Texas Holdem     n Queens     Monday Tuesday Happy Days     Hidden word     Hitori solver     The River I.     Simple Awalé     Morellet’s random lines     Code4Life     Dominoes solver     Simplified Monopoly™ Turns Prediction     Brackets, Extended Edition     Dumbbells solver     Ghost Legs     Pirate's treasure     Guessing n Cheating     Rooks Movements     The Dart 101     Unary - Code Golf     Blowing Fuse     Battleship     Rock Paper Scissors Lizard Spock     TicTacToe     Rock-Paper-Scissors War     Sudoku Validator     7-segment scanner     Flip The Sign     Nuggets numbers     Nature of triangles     if then else     Is the King In Check? (Part 1)     Fractal Image Recognition     Custom Game of Life     Is the King In Check? (Part 2)     Simple AI duels     Condition Overshadowing     Genetics and Computers     PARK PILOT     10 pin Bowling Scores     No More Pythons, Please!     Scary Ride at the Haunted Mansion     Tennis score     Frog Exchange     Blackjack solver     Word Search for Programmers     NATO-alphabet's odd uncles     Score a Bridge deal     Video Assistant Referee     Queen control     Scrabble score    
Constraint Propagation 2 River Crossing     Wave Function Collapse (sans Shannon)    
Convolution 1 Feature Extraction    
Coop Game 2 Code a la Mode     Fireworks    
Coordinates INTERMEDIATE 7 Divine!     Cloudy Weather     Connect the Hyper-Dots     The Mystic Rectangle     Minesweeper level generator     Chebyshev Orbiting     Interstellar    
Counting 1 How many triangles and rectangles?    
Counting sort 1 Assignments are boring    
Cryptography ADVANCED 20 Nintendo Sponsored Contest     Anagrams     The Empire Enigma     Encryption/Decryption of Enigma Machine     Enigma - 3 rotors without plugboard     Straddling Checkerboard Cryptography     Her Majesty's well shared secret     Elliptic curve cryptography     Discrete Log Problem     Hacking at RobberCity     Playfair Cipher     Decode the message     SHA-256 Hash     Folding a Note     Detective Geek     Running Up That Hill     The weight of words     Breaking Bifid     ASCII Art QR code     Frequency-Based Decryption    
cube 2 Detective Pikaptcha EP4     Die Handedness    
Cycle detection ADVANCED 4 Symbolic system of equations     Bulgarian solitaire     Kaprekar's routine     Library dependencies    
Data compression 1 IPv6 Shortener    
Data Structure 1 Container Terminal    
Data Types FUNDAMENTALS 4 Happy Numbers     Unit Fractions     Parse SQL Queries     Saving Snoopy    
DataBases 1 Parse SQL Queries    
Deadlock 1 Frog Exchange    
DeckBuilding 1 Green Circle    
decoder INTERMEDIATE 1 Prefix code    
Decryption 0
Dependency Graph INTERMEDIATE 2 1D Spreadsheet     Library dependencies    
Depth first search ADVANCED 2 Longest Road     Hotel    
Determinant 1 Die Handedness    
DFA 0
DFS ADVANCED 15 The Bridge     Vox Codei - Episode 1     Vox Codei - Episode 2     Smash The Code     Hypersonic     orDer oF succeSsion     Locked in gear     RUSH HOUR     abcdefghijklmnopqrstuvwxyz     Vox Codei - Episode 2 - Code Golf     Vox Codei - Episode 1 - Code Golf     The Bridge - Code Golf     Number Partition     The Other Side     Periodic table spelling    
Digit counts FUNDAMENTALS 2 Fair Numbering     Odd-Quad-Out    
Dijkstra 1 Grid climbing    
Dijkstra's algorithm 0
DIMACS ADVANCED 1 Horn-SAT solver    
Diophantine Equation ADVANCED 1 Hooch Clash    
Disappointment 1 TryAngle Catch    
Discrete Data 1 Body weight is a girl's secret    
Distances INTERMEDIATE 28 Game of Drones     Defibrillators     Mars Lander - Episode 2     Network Cabling     TAN Network     Mars Lander - Episode 3     Poker Chip Race     Mars Lander     Back to the Code     Code vs Zombies     Mad Pod Racing     CodeBusters     Fantastic Bits     Coders of the Caribbean     Spring Challenge 2020     Escaping the cat     🏐 🏖 Beach Volleyball 🏐 🏖     Connect the Hyper-Dots     The Mystic Rectangle     By train or by car ?     Another Road Construction Site - 1     Mars Lander - Episode 3 - Code Golf     Network Cabling - Code Golf     The alien business of cows     Vectors in variables dimensions     Interstellar     Seabed Security - Fall Challenge 2023     Snake    
Divergence 1 Mandelbrot Set Approximation    
DLX 1 25x25 Sudoku    
domino 1 Domino Puzzle    
Dot product INTERMEDIATE 2 Dead men's shot     Feature Extraction    
Double-and-add 1 Elliptic curve cryptography    
Dynamic programming ADVANCED 29 Roller Coaster     Blunder - Episode 2     The Resistance     Ticket to Ride: Europe     Parsing context-free grammar     Max Rect     The Grand Festival - I     The Grand Festival - II     Number of paths between 2 points     2-player game on a calculator     The Balanced Centrifuge Problem     Goro Want Chocolate     Seam Carving     Robbery optimisation     Chained Matrix Products     3×N Tiling     Thomas and the Freight Cars     Rod cutting problem     Ways to make change     Prime Fractals in Pascal's Triangle     Gerrymandering     Longest Increasing Subsequence     The Resistance - Code Golf     Roller Coaster - Code Golf     Grid climbing     Count as I count #2     String Balls II     MAGICAL FROG     Counter Attack    
Elliptic Curve ADVANCED 1 Elliptic curve cryptography    
Encoding INTERMEDIATE 15 Unary     The Resistance     Music Scores     Bruce Lee     Disordered First Contact     Encryption/Decryption of Enigma Machine     Unary - Code Golf     Decode the message     Byte pair encoding     Bijective Numeration     Substitution Encoding     Code Breaker Puzzle     The Resistance - Code Golf     Music Scores - Code Golf     Frequency-Based Decryption    
Encryption 0
Error-correcting code 1 Extended Hamming Codes    
Exhaustive search INTERMEDIATE 0
Factoring INTERMEDIATE 0
Fermat primes ADVANCED 1 Regular polygons    
Fifteen puzzle 1 Knights Jam    
Fire 1 Block the spreading fire !    
Flood fill ADVANCED 18 Tron Battle     Surface     Back to the Code     Smash The Code     Wondev Woman     Flood fill Example     Code of Kutulu     Vindinium     Go competition     Coders of the Realm - 1v1     Coders of the Realm     A Game of Go     SameGame     5D Chests     Moves in maze     Git Patchwork     Surface - Code Golf     The Other Side    
Formulas FUNDAMENTALS 1 Dolbear's Law    
Fractal 3 What's so complex about Mandelbrot?     Paper-folding curve     circular automation, the period of chaos    
Fractals 1 Mandelbrot Set Approximation    
Fruit 2 Smooth!     Smooth Factory    
Game theory 1 Simple AI duels    
Gauss–Wantzel theorem ADVANCED 1 Regular polygons    
Generation 0
Genetic Algorithm ADVANCED 3 Bit Runner 2048     Search Race     CG's Next Top Model    
Genetics ADVANCED 2 Blood Types     Match DNA Sequence    
Geolocation INTERMEDIATE 1 Hello, World!    
Geometry INTERMEDIATE 24 Nature of quadrilaterals     Apple tree     Morellet’s random lines     1×1×1 Rubik’s cube movements     Counting Squares on Pegs     Darts     Dead men's shot     Smile! Frieze! Cheese!     Encounter surface     The lost files     Flower beds     Low Resolution: What's The Shape?     Nature of triangles     Connect the Hyper-Dots     Die Handedness     Walk on a Die     Crop-Circles     Should Bakers be Frugal?     Blending Colors     Cylinders     String balls     Coastline     How high up does the beer go?     The flight of birds    
Gradient descent 1 Particle Detection with Cloud Chamber    
Graph theory INTERMEDIATE 5 Cross the lines     Plague, Jr     Map Colorations     The lost files     Snake    
graph traversal INTERMEDIATE 6 Domino Puzzle     Binary Search Tree Traversal     The lost files     Fall Challenge 2020     We're going in circles!     The Other Side    
Graphs INTERMEDIATE 36 Death First Search - Episode 1     Dwarfs standing on the shoulders of giants     Death First Search - Episode 2     TAN Network     2.5D maze     Ghost in the Cell     The Travelling Salesman Problem     Plight Of The Fellowship Of The Ring     Paper labyrinth     Symbolic system of equations     orDer oF succeSsion     Locked in gear     Mars Colonization     Propositions in Frege’s ideography     Battle Tower     English length units conversion     When pigs fly     Logically reasonable inequalities     Tree Paths     Nurikabe     TryAngle Catch     Spring Challenge 2021     Train passenger     Catching Up     DAWG     Entry code     How many roads lead to Rome?     Conditional probabilities     Longest coast     Character replacement problem     Dwarfs standing on the shoulders of giants - Code Golf     SPORE City Planner     Firewall placement     Spring Challenge 2023 - Ants     Interstellar     Six Degrees of Kevin Bacon    
Great-circle distance ADVANCED 1 Hello, World!    
Greedy algorithm 1 Coastline    
Greedy algorithms INTERMEDIATE 16 The Gift     Super Computer     Magic stones     The Travelling Salesman Problem     Add'em Up     Brick in the Wall     Rearrange string to two numbers     Forest Fire     Huffman Code     Battle Tower     Breaking Apart     Maximising integers     Catching Up     Travelling Salesman     Super Computer - Code Golf     BobTheScience and the Food Stack    
Green IT 1 Green Circle    
Grid 4 Flower beds     Kakuro Solver     Is the King In Check? (Part 1)     Is the King In Check? (Part 2)    
Group theory ADVANCED 5 2×2×2 Rubik’s cube movements     Doubly solved Rubik's cube     Ring the bells     Mathematics for big ears     N Pearls Necklace    
Guessing digits 1 Guessing digits    
Hash tables FUNDAMENTALS 4 MIME Type     Markov Text Generation     Goldbach’s Conjecture     What 🌼 is 🌷 your 🌸 garden 💐 worth?    
Hashing 1 SHA-256 Hash    
Heuristic search INTERMEDIATE 4 A-star exercise     Travelling Salesman     Block the spreading fire !     Mad Knights    
Hooch 1 Hooch Clash    
Horn-SAT ADVANCED 1 Horn-SAT solver    
if/else 1 FireControl    
Image processing ADVANCED 9 Music Scores     Seam Carving     Photo Booth Transformation     Hidden Messages In Images     Fractal Image Recognition     Simple Blur     Identify a simple shape     Music Scores - Code Golf     How many triangles and rectangles?    
Indexation 1 MCxxxx microcontroller simulation    
Interpolation INTERMEDIATE 2 Her Majesty's well shared secret     Cubic Bézier curves    
interpreter 9 Reverse Polish Notation     Micro Assembly     Simple CPU Emulation 1     What the Brainfuck !     MCxxxx microcontroller simulation     Condition Overshadowing     Complicated interpreter     ASCII Art with Logo Language     ASCII Art with Logo Language, Part 2    
Intervals FUNDAMENTALS 6 Shadows of the Knight - Episode 1     Shadows of the Knight - Episode 2     Fair Numbering     Graffiti on the fence     Shadows of the Knight - Episode 2 - Code Golf     Shadows of the Knight - Episode 1 - Code Golf    
Jump Point Search INTERMEDIATE 2 Jump Point Search - Preprocessing     Jump Point Search - Runtime    
Kahn’s algorithm 1 Library dependencies    
Lazy Evaluation INTERMEDIATE 1 1D Spreadsheet    
LCG 1 Random Time Travel    
Least-squares 1 Particle Detection with Cloud Chamber    
Lexicographic order 1 Ring the bells    
Line breaks 1 Breaking Apart    
Linear algebra 3 1000000000D WORLD     Die Handedness     Running Up That Hill    
Lists FUNDAMENTALS 17 There is no Spoon - Episode 1     The Urinal Problem     Elementary cellular automaton     Queneau Numbers     2×2×2 Rubik’s cube movements     Criminal     Target Firing     Custom Game of Life     Simple Blur     Wine from Kalbodia - Episode 1     FireControl     The Stonemason     Artificial Emotional Intelligence     Boggle with Friends     Cheap Choices     Periodic table spelling     Six Degrees of Kevin Bacon    
Lists and Arrays 1 Artificial Emotional Intelligence    
Lizard 0
Logic FUNDAMENTALS 26 Horn-SAT solver     Guessing n Cheating     Guessing digits     Breach     Propositions in Frege’s ideography     Murder in the village!     Find the liars     When pigs fly     Nurikabe     Master of Mayhem     Someone's Acting Sus....     The Hidden Fortress     Genetics and Computers     Rocket engines     Logic gates     Takuzu Solver     Complicated interpreter     Merlin's Magic Square     Suguru Solver     Create 'Turn Here' Signs     |Build A Bookcase|🔨     Tile a Floor     The alien business of cows     Tile a Floor Differently     Video Assistant Referee     Mosaic    
Logical problem INTERMEDIATE 1 Assignments are boring    
Loops FUNDAMENTALS 105 Temperatures     ASCII Art     Unary     MIME Type     Defibrillators     Horse-racing Duals     Stock Exchange Losses     Network Cabling     Scrabble     Temperatures     The Descent     Squares order     May the Triforce be with you!     Minesweeper     Rugby score     Reversed Look-and-say     Horse-racing Hyperduals     Folding Paper     n Queens     Hitori solver     Porcupine Fever     Bingo!     Dominoes solver     Simplified Monopoly™ Turns Prediction     Bank Robbers     Bulgarian solitaire     Brackets, Extended Edition     Dumbbells solver     Ghost Legs     Kaprekar's routine     Pirate's treasure     Rooks Movements     IP mask calculating     Unary - Code Golf     Lumen     Forest Fire     Happy Numbers     Surakarta     Rectangle Partition     Chess board analyzer     Target Firing     Dungeons and Maps     7-segment scanner     Unique Prefixes     Low Resolution: What's The Shape?     Hidden Messages In Images     Ways to make change     🏐 🏖 Beach Volleyball 🏐 🏖     IPv6 Shortener     if then else     Divisibility of Fibonacci numbers sum     Fractal Image Recognition     Pedestrian Traffic     Valid brackets in code     Custom Game of Life     Zhiwei Sun Squares     Shadow Casting     Object Insertion     Folding a Note     Someone's Acting Sus....     Detective Geek     Simple auto-scaling     Lost astronaut     Code Breaker Puzzle     Various Number Spirals     Thermal Flying - Episode 1     FireControl     Frame the picture     Faro shuffle     Self Checkout Machine     Genetics and Computers     Body weight is a girl's secret     Minesweeper level generator     Rotating arrows     10 pin Bowling Scores     No More Pythons, Please!     All Operations are Equal!     Snail Run     Tennis score     Constrained Latin Squares     Blackjack solver     Match DNA Sequence     Messed up mosaics     Another Road Construction Site - 1     Goldbach’s Conjecture     Create 'Turn Here' Signs     Shoot Enemy Aircraft     |Build A Bookcase|🔨     Team Building     Tabloid Couple-Names 💕     ASCII Art - Code Golf     The Descent - Code Golf     Network Cabling - Code Golf     Word Search for Programmers     The helpdesk     The leaking bathtub     Fibonacci's Rabbit     BobTheScience and the Food Stack     Queen control     Advertisements     Panel count     Periodic table spelling     Battle of Heroes     Scrabble score     Kangaroo words    
Machine learning ADVANCED 5 Basic Decision Tree - 1     Basic Decision Tree - 2     Sticky Keyboard     CG's Next Top Model     Survey Prediction    
Manhattan distance 1 Snail Run    
Markov Chain 1 Risk odds calculator    
Markov chains 1 Markov ants    
Mathematics INTERMEDIATE 59 Quaternion Multiplication     Nature of quadrilaterals     Factorial vs Exponential     Number of letters in a number - Binary     Next car license plate ?     Folding Paper     Execution Circle     What's so complex about Mandelbrot?     Magic count of numbers     Box of Cigars     Expand the polynomial     Morellet’s random lines     Bag of Balls     Bank Robbers     Trits (Balanced Ternary Computing)     Digit sum successor     Her Majesty's well shared secret     Brick in the Wall     Robbery optimisation     Photo Booth Transformation     Bit count to limit     Halting sequences     Smile! Frieze! Cheese!     Encounter surface     Number derivation     Place the Parenthesis     Nature of triangles     Christmas Tree     Prime Fractals in Pascal's Triangle     Zhiwei Sun Squares     Cosmic Love     Primitive Pythagorean Triples     Die Handedness     Walk on a Die     A Bunny and Carrots     Rocket engines     Continued Fractions     All Operations are Equal!     Ulam Spiral     Running Up That Hill     Should Bakers be Frugal?     Conditional probabilities     Max Area     Another Road Construction Site - 1     Goldbach’s Conjecture     Euclid's Algorithm     |Build A Bookcase|🔨     Recurring decimal to fraction     Mandelbrot Set Approximation     Couple's Picture-Frame     Fibonacci's Rabbit     Furlongs per Fortnight     Euclid's algorithm with complex numbers     Mirrors     Count your coins     What 🌼 is 🌷 your 🌸 garden 💐 worth?     Popularity of each activity     deus Hex machina     MAGICAL FROG    
Maths 0
Matrix product INTERMEDIATE 2 Chained Matrix Products     MAGICAL FROG    
maze ADVANCED 14 Detective Pikaptcha EP1     Detective Pikaptcha EP2     Detective Pikaptcha EP3     Detective Pikaptcha EP4     Space Maze     Sokoban     Dungeon 3D     Hexagonal Maze     Moves in maze     Maze /w teleporters and jumps     Hexagonal Maze - part2     Sky Maze Adventures 1     An adventure in the fantasy world     Maze for the Champions    
MCTS 1 Night Of War    
Medians INTERMEDIATE 2 Network Cabling     Network Cabling - Code Golf    
Memoization ADVANCED 16 Dwarfs standing on the shoulders of giants     Surface     Blunder - Episode 2     The Resistance     Length of Syracuse Conjecture Sequence     1D Spreadsheet     Windmill problem     Van Eck's sequence     Rod cutting problem     Prime Fractals in Pascal's Triangle     Goldbach’s Conjecture     The Resistance - Code Golf     Surface - Code Golf     Dwarfs standing on the shoulders of giants - Code Golf     Grid climbing     Chebyshev Orbiting    
Merge sort 1 1000000000D WORLD    
Minimax ADVANCED 35 Tron Battle     Great escape     Wondev Woman     Minimax exercise     Ultimate Tic-Tac-Toe     Xmas Rush     Vindinium     Yavalath     Cultist Wars     Breakthrough     Paper soccer     Onitama     Tulips and Daisies     Yinsh     Othello     Atari Go     Dots and Boxes     Atari Go 9x9     Blocking     Connect 4     Clobber     Night Of War     Spring Challenge 2021     Amazons     Adversarial Mate with Rook     Abalone     Counting TicTacToe     Lines Of Action     nine men's morris     Isola     Git Patchwork     Impasse     Mad Knights     Minishogi     Dice Shogi    
Mobius 1 Detective Pikaptcha EP3    
Modular calculus INTERMEDIATE 9 Vortex     Monthly System     Elliptic curve cryptography     Discrete Log Problem     Decode the message     Divisibility of Fibonacci numbers sum     Cooking passion     Self Checkout Machine     Running Up That Hill    
Moebius 1 Detective Pikaptcha EP3    
Monte Carlo tree search ADVANCED 22 Monte Carlo Tree Search exercise     Ultimate Tic-Tac-Toe     Langton s Ant     Yavalath     Breakthrough     Tulips and Daisies     Yinsh     Othello     Blocking     Fall Challenge 2020     Clobber     Amazons     Can you save the forest - Episode 1     Abalone     Counting TicTacToe     Lines Of Action     Isola     Git Patchwork     Impasse     Mad Knights     Minishogi     Dice Shogi    
Multi-agent ADVANCED 17 Platinum Rift - Episode 1     Platinum Rift - Episode 2     Mad Pod Racing     CodeBusters     Fantastic Bits     Coders of the Caribbean     Mean Max     Botters of the Galaxy     Crystal Rush     Spring Challenge 2020     TryAngle Catch     Can you save the forest - Episode 2     Clash of Bots     Spider Attack     Keep Off The Grass     Spring Challenge 2023 - Ants     Seabed Security - Fall Challenge 2023    
neighbour count INTERMEDIATE 1 Detective Pikaptcha EP1    
Neural network ADVANCED 6 Mad Pod Racing     Binary neural network - Part 1     Abalone     Lines Of Action     Impasse     Mad Knights    
NGR 1 1. NGR - Basic Radar    
Nim game 1 Find the winning strategy    
NRPA 1 SameGame    
number system 1 Lost astronaut    
Number theory INTERMEDIATE 10 Hooch Clash     Are The Clumps Normal     Smooth!     Smooth Factory     Unit Fractions     Bailey–Borwein–Plouffe Pi     Primitive Pythagorean Triples     Solid Integer     Continued Fractions     Number Partition    
Numbers FUNDAMENTALS 4 Next growing number     Number formatting     Stunning numbers     Decimal numbers to floating numbers    
Opening Book 1 Yavalath    
Optimization INTERMEDIATE 18 Code of the Rings     Code vs Zombies     Mad Pod Racing     Ticket to Ride: Europe     Harmless Rooks     A*Craft     Bender - Episode 4     Road Trip     Chained Matrix Products     The Michelangelo Code     Block the spreading fire !     Start-up!     Killer Sudoku Extreme Challenge     Tiny Forest     Firewall placement     Mind Cracker     deus Hex machina     String Balls II    
Output formatting FUNDAMENTALS 1 Expand the polynomial    
Palindrome INTERMEDIATE 2 Near-Palindromes     Longest Palindrome    
parenthesis 1 Level of nested parentheses    
Parsing FUNDAMENTALS 36 CGX Formatter     XML MDF-2016     Quaternion Multiplication     Brackets, Enhanced Edition     Order of Oopserations!     Numeral system     Expand the polynomial     Trits (Balanced Ternary Computing)     Breach     Fun with Set theory     Propositions in Frege’s ideography     Auto pickup     Source Code Analyser     When pigs fly     Equivalent Resistance, Circuit Building     Place the Parenthesis     IPv6 Shortener     Parse SQL Queries     Bijective Numeration     Offset Arrays     Wine from Kalbodia - Episode 1     Thermal Flying - Episode 1     Ted's compiler     Retro Typewriter Art     Complicated interpreter     WW2 Mortar Warfare     Match DNA Sequence     The logo beyond C++ and C#     Table of Contents     Fun with CGX Expressions     Fibonomials     Remove insert statements     Digital Scoreboard     24: The Long Game     Solve for X     Decimal numbers to floating numbers    
Path finding ADVANCED 0
Pathfinding ADVANCED 48 Tron Battle     Death First Search - Episode 2     The Labyrinth     Power of Thor - Episode 2     TAN Network     Blunder - Episode 2     The Fall - Episode 2     The Fall - Episode 3     Platinum Rift - Episode 1     Don't Panic - Episode 2     Platinum Rift - Episode 2     Great escape     2.5D maze     Coders of the Caribbean     A-star exercise     Plight Of The Fellowship Of The Ring     Paper labyrinth     orDer oF succeSsion     Number of paths between 2 points     Xmas Rush     Bender - Episode 4     11-puzzle     Cloudy Weather     Paper soccer     Space Maze     Spring Challenge 2020     The lost child.Episode-1     Dungeons and Maps     Jump Point Search - Preprocessing     Sokoban     Jump Point Search - Runtime     Nurikabe     A Man with a Plan     Volcanoes     Train passenger     Dungeon 3D     Catching Up     Sliding Maze Puzzle     How many roads lead to Rome?     Hexagonal Maze     Hexagonal Maze - part2     Sky Maze Adventures 1     The Fall - Episode 3 - Code Golf     The Labyrinth - Code Golf     The Fall - Episode 2 - Code Golf     Grid climbing     Snake     Rummikub 1    
Pathfinding, Graphs ADVANCED 0
Patience 1 🃏 FreeCell 🃏    
Pattern 1 Duo combinations    
Pattern recognition ADVANCED 13 Music Scores     Vox Codei - Episode 2     Code of the Rings     Divine!     Find the replacement     Trits (Balanced Ternary Computing)     Barcode scanner     Breach     Smile! Frieze! Cheese!     Messed up mosaics     Vox Codei - Episode 2 - Code Golf     Music Scores - Code Golf     NATO-alphabet's odd uncles    
Permutations INTERMEDIATE 14 Genome Sequencing     Queneau Numbers     Photo Booth Transformation     Crossword     Doubly solved Rubik's cube     Kids Blocks     Ring the bells     Mathematics for big ears     Balanced Levers     Walk on a Die     Genome Sequencing - Code Golf     24: The Long Game     Mind Cracker     Advertisements    
Physics INTERMEDIATE 14 Gravity Tumbler     Cards castle     Sandpile addition     Apple tree     Stall tilt     Particle Detection with Cloud Chamber     Equivalent Resistance, Circuit Building     🏐 🏖 Beach Volleyball 🏐 🏖     Cosmic Love     Space Shooter     Balanced Levers     Snooker Ball Collision     WW2 Mortar Warfare     The flight of birds    
Pi 1 Bailey–Borwein–Plouffe Pi    
polymorphism 1 The parking    
Polynomials ADVANCED 3 Her Majesty's well shared secret     2nd degree polynomial - simple analysis     Fibonomials    
pong 0
prefix sum 1 Hunger    
Primes INTERMEDIATE 8 Divide the factorial     Count of Primes in a number grid     Factorials of primes decomposition     The Balanced Centrifuge Problem     CGFunge Prime     Ulam Spiral     Goldbach’s Conjecture     Eratosthenes' Wallpaper    
Priority Queue INTERMEDIATE 1 Identifying data structure    
Probabilities 1 Conditional probabilities    
Probability INTERMEDIATE 8 Bag of Balls     Dice probability calculator     Benford's law     Markov Text Generation     Card Counting when easily distracted     Markov ants     Risk odds calculator     Poker    
Puzzle 1 Picture Puzzle    
Queue FUNDAMENTALS 1 Identifying data structure    
Queues FUNDAMENTALS 2 War     The helpdesk    
Radix INTERMEDIATE 4 Mayan Calculation     Numeral system     Bijective Numeration     Mayan Calculation - Code Golf    
Random 1 Random Time Travel    
Random number generator 1 Simple AI duels    
Random walk 1 Markov ants    
Range 0
Rational Numbers INTERMEDIATE 2 Rational Number Tree     Continued Fractions    
Ray Casting 1 Let's make a cheap ASCII 3D engine!    
Reading Comprehension 0
Reading the statement 8 Hooch Clash     Smooth!     Smooth Factory     A Man with a Plan     In Stereo     Wave Function Collapse (sans Shannon)     The alien business of cows     Score a Bridge deal    
Recursion FUNDAMENTALS 39 Dwarfs standing on the shoulders of giants     Surface     Blunder - Episode 2     The Resistance     There is no Spoon - Episode 2     Carmichael numbers     Winamax Sponsored Contest     2048 scores     The Grand Festival - I     The Grand Festival - II     Go competition     Surakarta     Let's Go To The Cinema!     Divisibility of Fibonacci numbers sum     Offset Arrays     Prime Fractals in Pascal's Triangle     Balanced Levers     24 Game     L-triominoes     Gerrymandering     Derivative time !!! - part1     Derivative time !!! - part2     🤖 Robot Reach     the voucher     Takuzu Solver     RUSH HOUR     Find the missing plus signs in addition     Suguru Solver     Killer Sudoku Solver     Euclid's Algorithm     Fun with CGX Expressions     The Resistance - Code Golf     Surface - Code Golf     Dwarfs standing on the shoulders of giants - Code Golf     Mandelbrot Set Approximation     Fibonomials     Grid climbing     Euclid's algorithm with complex numbers     Number Partition    
Registers 1 MCxxxx microcontroller simulation    
Regression analysis ADVANCED 2 Blunder - Episode 3     Blunder - Episode 3 - Code Golf    
Regular expressions INTERMEDIATE 5 Murder in the village!     IPv6 Shortener     Valid brackets in code     Where's Wally     Holey Times    
Remainder Theorem ADVANCED 1 Remainder Fantasy    
Research 0
Resource management ADVANCED 12 Game of Drones     Platinum Rift - Episode 1     Platinum Rift - Episode 2     CodeBusters     Ghost in the Cell     Code Royale     Tower Dereference     Crystal Rush     Spider Attack     Should Bakers be Frugal?     Keep Off The Grass     Spring Challenge 2023 - Ants    
Reverse engineering FUNDAMENTALS 2 CodinGame Sponsored Contest     Breach    
Reverse Polish Notation INTERMEDIATE 2 Reverse Polish Notation     The Polish Dictionary    
Rewriting FUNDAMENTALS 1 Symbolic system of equations    
Rock Paper Scissors 1 Rock-Paper-Scissors War    
rotation INTERMEDIATE 1 Windmill problem    
Rubik's cube 2 2×2×2 Rubik’s cube movements     Doubly solved Rubik's cube    
Rubik’s cube 0
Run-length encoding 1 Binary image    
Satisfiability INTERMEDIATE 1 Horn-SAT solver    
Scheduling ADVANCED 3 Super Computer     Legendary Archer Octavius     Super Computer - Code Golf    
Science 0
Search 1 Frog Exchange    
Secret sharing 1 Her Majesty's well shared secret    
Seedfinding 1 Random Time Travel    
Sequences FUNDAMENTALS 6 Conway Sequence     Next car license plate ?     Folding Paper     Box of Cigars     Length of Syracuse Conjecture Sequence     Remaining Card    
Set theory FUNDAMENTALS 1 Fun with Set theory    
Sets FUNDAMENTALS 4 Telephone Numbers     Guessing n Cheating     Telephone Numbers - Code Golf     Rummikub 1    
Sexagesimal system INTERMEDIATE 1 Hello, World!    
SHA-256 1 SHA-256 Hash    
Shogi 2 Minishogi     Dice Shogi    
Shortest path ADVANCED 0
Shortest path algorithm 0
Shortest path problem 1 Catching Up    
Simulated Annealing ADVANCED 3 Search Race     Travelling Salesman     CG's Next Top Model    
Simulation INTERMEDIATE 45 Blunder - Episode 1     Roller Coaster     Poker Chip Race     Vox Codei - Episode 1     Vox Codei - Episode 2     Back to the Code     Code vs Zombies     Smash The Code     Hypersonic     Fantastic Bits     Wondev Woman     Mean Max     A*Craft     Bit Runner 2048     Detective Pikaptcha EP2     Detective Pikaptcha EP3     Detective Pikaptcha EP4     Let's Go To The Cinema!     Space Maze     Tower Dereference     TicTacToe     Search Race     SameGame     2048     Volcanoes     Custom Game of Life     Can you save the forest - Episode 1     Can you save the forest - Episode 2     Space Shooter     Snooker Ball Collision     Thermal Flying - Episode 1     Block the spreading fire !     Should Bakers be Frugal?     Merlin's Magic Square     Tiny Forest     Chain Reaction     Vox Codei - Episode 2 - Code Golf     Vox Codei - Episode 1 - Code Golf     Roller Coaster - Code Golf     Blunder - Episode 1 - Code Golf     Chebyshev Orbiting     Mirrors     Markov ants     Rummikub 1     The flight of birds    
Sliding window 1 Feature Extraction    
Smooth 2 Smooth!     Smooth Factory    
Snell's Law 1 🏐 🏖 Beach Volleyball 🏐 🏖    
Sorting FUNDAMENTALS 12 Add'em Up     Dynamic sorting     Hunger Games     Thomas and the Freight Cars     Inversion count     Magic String     Snake Sort 2D     Video comments     Roman Sorting     BobTheScience and the Food Stack     Scrabble score     Kangaroo words    
Spock 0
SQL 2 Parse SQL Queries     Remove insert statements    
Stack FUNDAMENTALS 10 Reverse Polish Notation     Micro Assembly     Simple CPU Emulation 1     Identifying data structure     Let's Go To The Cinema!     The Polish Dictionary     Container Terminal     Valid brackets in code     Ted's compiler     Saving Snoopy    
State machine ADVANCED 12 Blunder - Episode 1     CodeBusters     Elementary cellular automaton     Langton's ant     Parsing context-free grammar     Code4Life     Code a la Mode     Is that a possible word?     Fireworks     Simple AI duels     Markov Text Generation     Blunder - Episode 1 - Code Golf    
steganography 1 Hidden Messages In Images    
Steiner Tree 1 Binary Extension    
Streams FUNDAMENTALS 1 Smooth Factory    
string FUNDAMENTALS 5 Unary - Code Golf     Detective Geek     Genetics and Computers     No More Pythons, Please!     Kangaroo words    
String manipulation FUNDAMENTALS 60 Text alignment     Anagrams     Army ants     Reversed Look-and-say     Bulk Email Generator     Organic Compounds 🔬     Encryption/Decryption of Enigma Machine     Rectangular block spinner     Dynamic sorting     Fishing With A Stick     Rearrange string to two numbers     Create the longest sequence of 1s     TicTacToe     Auto pickup     Source Code Analyser     Breaking Apart     7-segment scanner     Prefix code     Unique Prefixes     Nicholas Breakspeare and Hugh of Evesham     Place the Parenthesis     if then else     Valid brackets in code     In Stereo     Substitution Encoding     Caesar is the chief     Cooking passion     Where's Wally     Magic String     3D printer     Frame the picture     Self Checkout Machine     Tricky Number Verifier     The broken editor     Insert to String     Frog Exchange     Match DNA Sequence     Card Counting when easily distracted     Messed up mosaics     Saving Snoopy     Create 'Turn Here' Signs     Make an Atari Font     Chain Reaction     Tabloid Couple-Names 💕     Fix the spaces     Word Search for Programmers     Fibonomials     The alien business of cows     Frequency-Based Decryption     NATO-alphabet's odd uncles     Furlongs per Fortnight     24: The Long Game     What 🌼 is 🌷 your 🌸 garden 💐 worth?     You are the Father: Maury Povich Style     Video Assistant Referee     Square Spiral for Alien Contact 👽     Interstellar     deus Hex machina     anagram to break the code !     Decimal numbers to floating numbers    
Strings FUNDAMENTALS 52 ASCII Art     Unary     MIME Type     Mayan Calculation     CGX Formatter     Genome Sequencing     Othello     XML MDF-2016     Jack Silver: The Casino     How time flies     Nature of quadrilaterals     2×2×2 Rubik’s cube movements     Hidden word     Longest Palindrome     Monthly System     Paper-folding curve     Text formatting     Find the replacement     Paper labyrinth     De-FizzBuzzer     Encryption/Decryption of Enigma Machine     Fishing With A Stick     Criminal     Palindromic Decomposition     Breach     Crossword     Chess board analyzer     Dungeons and Maps     Particle Detection with Cloud Chamber     IPv6 Shortener     Master of Mayhem     The Michelangelo Code     In Stereo     Substitution Encoding     FireControl     3D printer     Artificial Emotional Intelligence     Blackjack solver     Table of Contents     Eratosthenes' Wallpaper     Fun with CGX Expressions     Duo combinations     ASCII Art - Code Golf     Genome Sequencing - Code Golf     Mayan Calculation - Code Golf     Number formatting     Frequency-Based Decryption     String balls     Advertisements     Interstellar     Battle of Heroes     Scrabble score    
Strive for Simplicity 5 Robot Show     Insert to String     Should Bakers be Frugal?     Merlin's Magic Square     deus Hex machina    
Tables 1 Parse SQL Queries    
Tile-matching 1 SameGame    
Tiling 2 Depot organization     3×N Tiling    
Time 3 🏐 🏖 Beach Volleyball 🏐 🏖     Railway Station Clock     By train or by car ?    
Tokens 0
Topology INTERMEDIATE 3 Cross the lines     HTML table cell split     The lost files    
Transformations 1 Smile! Frieze! Cheese!    
Travelling salesman 1 Snake    
Trees INTERMEDIATE 5 Ancestors & Descendants     Code your own Automaton2000, step 1     Plague, Jr     Huffman Code     Find the liars    
Tricky 1 Sum of divisors    
Tries ADVANCED 3 Telephone Numbers     Prefix code     Telephone Numbers - Code Golf    
Trigonometry INTERMEDIATE 15 Defibrillators     Mars Lander - Episode 2     TAN Network     Mars Lander - Episode 3     Mars Lander     Mad Pod Racing     Nature of quadrilaterals     Fantastic Bits     Hello, World!     Escaping the cat     Nature of triangles     Let's make a cheap ASCII 3D engine!     WW2 Mortar Warfare     Mars Lander - Episode 3 - Code Golf     Number of triangles enclosing X    
Two pointers 1 1000000000D WORLD    
UCB1 1 Monte Carlo Tree Search exercise    
UCT 1 Monte Carlo Tree Search exercise    
Unit propagation 2 Horn-SAT solver     English length units conversion    
windmill 1 Windmill problem    
XOR FUNDAMENTALS 1 Hacking at RobberCity    
💡💡💡💡💡 1 Light Bulbs    
💦💦💦🔥🔥🔥 1 1D Bush Fire