The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Deltas between diamonds and silvers in C in chars. Achievements Cheevos Holes Languages Medals Miscellaneous Overall 💎 Diamond Deltas Most Tied 🥇 Golds Oldest 💎 Diamonds Oldest 🦄 Unicorns All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig All Bytes Chars Overall 💎 Diamond Deltas Most Tied 🥇 Golds Oldest 💎 Diamonds Oldest 🦄 Unicorns Scoring All Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 # Golfer Hole Total 1st ovs-code 🇩🇪 SI Units 133 2nd KasperKivimaeki 🇫🇮 Poker 50 3rd nwellnhof 🇩🇪 Calendar 37 4th rucin93 🇵🇱 24 Game 30 5th rhdqor213 Repeating Decimals 24 5th JayXon 🇺🇸 Tongue-twisters 24 7th CatsAreFluffy Maze 22 8th AdrienHache 🇫🇷 Rijndael S-box 21 9th KasperKivimaeki 🇫🇮 Mahjong 20 10th KasperKivimaeki 🇫🇮 brainfuck 19 11th KasperKivimaeki 🇫🇮 Rock-paper-scissors-Spock-lizard 15 12th rhdqor213 Medal Tally 14 12th ovs-code 🇩🇪 Star Wars Opening Crawl 14 14th rhdqor213 Minesweeper 13 15th Alex-x90 🇺🇸 12 Days of Christmas 12 15th saito-ta 🇯🇵 Lucky Tickets 12 15th JayXon 🇺🇸 Morse Decoder 12 18th rhdqor213 Trinomial Triangle 11 19th rhdqor213 Reversi 10 19th ovs-code 🇩🇪 N Queens 10 19th nwellnhof 🇩🇪 United States 10 22nd ovs-code 🇩🇪 Proximity Grid 9 23rd AdrienHache 🇫🇷 Pangram Grep 8 23rd saito-ta 🇯🇵 Star Wars GPT 8 23rd ovs-code 🇩🇪 Reverse Polish Notation 8 23rd HPWiz 🇳🇿 Catalan Numbers 8 23rd JayXon 🇺🇸 Tic-tac-toe 8 28th rhdqor213 Intersection 7 28th ovs-code 🇩🇪 Look and Say 7 28th rhdqor213 Zodiac Signs 7 28th Alex-x90 🇺🇸 CSS Colors 7 28th KasperKivimaeki 🇫🇮 γ 7 28th ovs-code 🇩🇪 Vampire Numbers 7 34th JayXon 🇺🇸 QR Decoder 6 34th rhdqor213 Leyland Numbers 6 34th KasperKivimaeki 🇫🇮 Polyominoes 6 34th ovs-code 🇩🇪 Sudoku (Fill-in) 6 34th JayXon 🇺🇸 Morse Encoder 6 34th rhdqor213 Multitap Input 6 40th rhdqor213 Gijswijt’s Sequence 5 40th rhdqor213 Smith Numbers 5 40th KasperKivimaeki 🇫🇮 DFA Simulator 5 40th KasperKivimaeki 🇫🇮 Spelling Numbers 5 44th KasperKivimaeki 🇫🇮 ln 2 4 44th ovs-code 🇩🇪 Kolakoski Constant 4 44th ovs-code 🇩🇪 Levenshtein Distance 4 44th JayXon 🇺🇸 PalindromemordnilaP 4 44th rhdqor213 Continued Fractions 4 44th rhdqor213 ASCII Table 4 44th JayXon 🇺🇸 Ordinal Numbers 4 44th rhdqor213 Rule 110 4 52nd rhdqor213 Factorial Factorisation 3 52nd Lydxn 🇨🇦 99 Bottles of Beer 3 52nd Lydxn 🇨🇦 Abundant Numbers 3 52nd primo-ppcg 🇹🇭 Jacobi Symbol 3 56th KasperKivimaeki 🇫🇮 τ 2 56th rhdqor213 Card Number Validation 2 56th rhdqor213 ISBN 2 56th Lydxn 🇨🇦 Emirp Numbers 2 56th rhdqor213 Christmas Trees 2 56th JayXon 🇺🇸 Forsyth–Edwards Notation 2 56th rhdqor213 Number Spiral 2 56th ovs-code 🇩🇪 Hexdump 2 56th JayXon 🇺🇸 Arrows 2 56th KasperKivimaeki 🇫🇮 π 2 56th saito-ta 🇯🇵 Topological Sort 2 56th KasperKivimaeki 🇫🇮 Scrambled Sort 2 56th Lydxn 🇨🇦 Evil Numbers 2 69th JayXon 🇺🇸 Kaprekar Numbers 1 69th rhdqor213 Partition Numbers 1 69th nwellnhof 🇩🇪 ROT13 1 69th Lydxn 🇨🇦 Lucky Numbers 1 69th JayXon 🇺🇸 Ten-pin Bowling 1 69th KasperKivimaeki 🇫🇮 Emojify 1 69th sisyphus-ppcg 🇦🇺 Niven Numbers (Long) 1 69th rhdqor213 Happy Numbers (Long) 1 69th JayXon 🇺🇸 Musical Chords 1 69th Lydxn 🇨🇦 Leap Years 1 69th rhdqor213 λ 1 69th saito-ta 🇯🇵 Mandelbrot 1 1–80 of 87 Next Last