The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Zeckendorf Representation in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial 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 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring 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 Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal 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 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 401st CaedenHarper 🇨🇦 787 113 463ms 4 Oct 2024 401st fuzzylojik-golf 🇺🇸 787 113 473ms 6 Jul 2025 403rd guilhem-roy 🇫🇷 787 136 847ms 10 Jul 2024 403rd aalec 787 136 9ms 22 Nov 2025 405th stefangimmillaro 787 169 157ms 25 Aug 2024 406th DialFrost 🇸🇬 785 90 5ms 25 Aug 2024 407th Shanethegamer 🇺🇸 785 171 3ms 13 Sep 2024 408th DialFrost 🇸🇬 784 136 11ms 3 Jan 2026 409th DialFrost 🇸🇬 782 144 189ms 16 Nov 2024 410th albanian-laundromat 782 261 1,475ms 23 days ago 411th emgordon154 781 108 26ms 22 May 2025 412th wobblybits 781 137 10ms 19 Aug 2025 412th shelerr 781 137 10ms 22 Aug 2025 412th retrohun 781 137 11ms 23 Oct 2025 412th kitotch 781 137 11ms 7 days ago 416th Yax42 🇫🇷 779 131 470ms 7 Oct 2025 417th canissimia 🇦🇶 779 299 6ms 21 Jul 2024 418th Shanethegamer 🇺🇸 778 110 89ms 13 Sep 2024 419th MeWhenI 🇻🇦 778 269 35ms 20 Apr 2025 420th error256 777 111 2ms 1 Jul 2024 421st annaproxy 777 118 16ms 31 Aug 2025 422nd MeWhenI 🇻🇦 777 141 444ms 1 Jul 2024 423rd lynn 777 146 31ms 2 Jul 2024 424th MeWhenI 🇻🇦 775 120 154ms 34 hours ago 425th ZakkkkAttackkkk 🇵🇭 775 138 12ms 2 Jul 2024 425th dirckvdende 775 138 11ms 2 Aug 2025 427th MeWhenI 🇻🇦 775 162 41ms 29 Apr 2025 428th MeWhenI 🇻🇦 771 174 3ms 2 Jul 2024 429th MeWhenI 🇻🇦 770 110 2ms 1 Jul 2024 430th elgan65536 🇺🇸 770 139 10ms 5 Jul 2024 430th cykim8811 770 139 10ms 10 Jul 2024 430th Alex-x90 🇺🇸 770 139 10ms 14 Jul 2024 430th vhoulbreque 🇫🇷 770 139 38ms 9 Feb 2025 430th qpwoeirut 770 139 12ms 25 Sep 2025 435th emplv 🇱🇻 764 113 115ms 5 Jul 2024 436th Natanaelel 🇸🇪 764 140 11ms 2 Jul 2024 437th DialFrost 🇸🇬 763 83 3ms 22 Jan 2025 438th emgordon154 763 143 9ms 24 days ago 439th lukegustafson 🇺🇸 761 91 12ms 2 Jul 2024 439th voytxt 🇨🇿 761 91 11ms 22 Jul 2024 441st Shanethegamer 🇺🇸 760 67 2ms 15 Sep 2024 442nd ovs-code 🇩🇪 760 129 65ms 4 Jul 2024 443rd MostParsingVex 760 144 453ms 28 Jul 2024 444th CaedenHarper 🇨🇦 759 96 1,059ms 23 Oct 2025 445th jmerle 🇳🇱 759 141 12ms 4 Jul 2024 446th rucin93 🇵🇱 757 102 150ms 31 Oct 2024 447th Shanethegamer 🇺🇸 756 112 2ms 13 Sep 2024 448th MeWhenI 🇻🇦 755 90 266ms 14 Jul 2024 449th emgordon154 755 139 478ms 8 Feb 2026 450th MeWhenI 🇻🇦 754 84 3ms 7 Aug 2024 451st neihousaigaai 754 142 11ms 29 Sep 2024 452nd h3ra993huskp 🇯🇵 753 149 565ms 30 Nov 2025 453rd stefangimmillaro 751 94 4ms 27 Aug 2024 454th MeWhenI 🇻🇦 751 97 946ms 15 Sep 2025 455th error256 750 103 160ms 13 Aug 2024 456th emgordon154 750 115 2ms 7 Feb 2026 457th DialFrost 🇸🇬 748 90 1,269ms 20 Sep 2024 458th Stockoh 🇫🇷 748 143 11ms 29 Sep 2024 458th snydej 748 143 31ms 21 Nov 2024 460th Natanaelel 🇸🇪 747 75 36ms 14 Jul 2024 461st mousetail 🇳🇱 747 178 205ms 1 Jul 2024 462nd madeforlosers 745 93 10ms 23 Oct 2024 463rd MeWhenI 🇻🇦 744 107 1,328ms 1 Jul 2024 464th MeWhenI 🇻🇦 744 141 467ms 1 Jul 2024 465th solisolu 743 116 2ms 18 Nov 2025 466th scpchicken 🇵🇼 743 144 30ms 13 Jul 2024 467th error256 741 120 554ms 13 Aug 2024 468th MeWhenI 🇻🇦 741 127 1,043ms 1 Jul 2024 469th retrohun 740 91 19ms 23 Oct 2025 470th Shanethegamer 🇺🇸 738 126 158ms 24 May 2025 471st commandz0 🇺🇸 738 145 11ms 1 Jul 2024 471st jared-hughes 738 145 9ms 3 Jul 2024 471st wh3n3v3r 🇨🇿 738 145 11ms 18 Nov 2024 471st Babafaba 738 145 69ms 2 Nov 2025 475th helbling 🇨🇭 737 94 13ms 1 Jul 2024 476th gjoacorp 🇬🇧 735 149 461ms 4 Aug 2025 477th AlephSquirrel 734 138 16ms 4 Oct 2024 478th KrausRaus 🇺🇸 733 146 12ms 4 Jul 2024 478th ComputerKWasTaken 🇺🇸 733 146 12ms 4 Jul 2024 478th hellwue 733 146 30ms 18 Jul 2024 First Prev 401–480 of 734 Next Last