The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 159th solisolu 877 122 12ms 9 Nov 2025 159th KatieLG 🇬🇧 877 122 11ms 7 Jan 2026 159th ryyyn 🇺🇸 877 122 30ms 10 Feb 2026 164th Shanethegamer 🇺🇸 876 117 2,737ms 25 Oct 2024 165th inventshah 876 125 464ms 11 Dec 2025 165th nwellnhof 🇩🇪 876 125 458ms 22 Jan 2026 167th albanian-laundromat 876 155 285ms 25 Feb 2026 168th emgordon154 875 40 58ms 21 Nov 2025 169th GrayJoKing 🇦🇺 875 91 1,253ms 6 Jul 2024 170th JayXon 🇺🇸 875 120 451ms 5 Jul 2024 171st Steffan153 🇫🇮 875 130 133ms 1 Jul 2024 171st ovs-code 🇩🇪 875 130 161ms 2 Jul 2024 173rd pardouin 🇫🇷 874 75 35ms 25 Aug 2025 174th DialFrost 🇸🇬 873 100 20ms 15 Dec 2024 175th IanUtley 873 105 15ms 1 Jul 2024 175th GrayJoKing 🇦🇺 873 105 16ms 3 Jul 2024 177th Shanethegamer 🇺🇸 872 115 5ms 13 Sep 2024 177th kg583 🇺🇸 872 115 4ms 23 days ago 179th MeWhenI 🇻🇦 872 117 387ms 19 Jun 2025 179th sean-niemann 🇺🇸 872 117 403ms 20 Jun 2025 179th stefangimmillaro 872 117 395ms 20 Jun 2025 182nd JayXon 🇺🇸 871 99 2ms 7 Jul 2024 183rd JayXon 🇺🇸 871 154 2ms 7 Jul 2024 183rd DialFrost 🇸🇬 871 154 3ms 28 Nov 2025 185th stefangimmillaro 871 156 316ms 22 Aug 2024 186th MeWhenI 🇻🇦 870 62 7ms 7 Aug 2024 187th Shanethegamer 🇺🇸 870 119 39ms 15 Sep 2024 188th bnic24 870 123 11ms 29 Jul 2024 188th iosovi 🇷🇴 870 123 11ms 9 Aug 2024 188th plcc0 870 123 11ms 4 Apr 2025 188th KasperKivimaeki 🇫🇮 870 123 11ms 5 Jul 2025 188th fuzzylojik-golf 🇺🇸 870 123 11ms 6 Jul 2025 188th rucin93 🇵🇱 870 123 11ms 6 Jul 2025 188th Matter1024 🇮🇳 870 123 12ms 26 days ago 195th ovs-code 🇩🇪 869 126 436ms 1 Jul 2024 196th Shanethegamer 🇺🇸 868 113 74ms 5 Dec 2024 197th albanian-laundromat 867 84 793ms 8 Feb 2026 198th ovs-code 🇩🇪 867 121 452ms 27 Jul 2024 199th Shanethegamer 🇺🇸 867 123 7ms 12 Sep 2024 200th KrausRaus 🇺🇸 866 80 10ms 2 Jul 2024 200th duckyluuk 🇳🇱 866 80 10ms 3 Sep 2024 200th Shanethegamer 🇺🇸 866 80 12ms 13 Sep 2024 203rd Steffan153 🇫🇮 866 131 31ms 12 Feb 2026 204th ovs-code 🇩🇪 865 99 90ms 11 Dec 2025 205th edsrzf 🇳🇿 865 132 39ms 24 May 2025 205th kg583 🇺🇸 865 132 38ms 24 May 2025 207th sean-niemann 🇺🇸 864 98 2ms 19 Nov 2025 208th Steffan153 🇫🇮 864 100 115ms 5 Jul 2024 209th SirBogman 🇺🇸 864 103 450ms 4 Jul 2024 210th sean-niemann 🇺🇸 864 134 106ms 1 Jul 2024 210th MeWhenI 🇻🇦 864 134 106ms 1 Jul 2024 212th error256 863 76 39ms 1 Jul 2024 213th mousetail 🇳🇱 863 124 11ms 2 Jul 2024 213th FlorianCassayre 🇫🇷 863 124 11ms 6 Jul 2024 213th codingisgreatbutiamnot 863 124 11ms 24 Aug 2024 213th mathisfun271 863 124 33ms 3 Oct 2024 213th Lv0Sys 🇵🇱 863 124 11ms 23 Feb 2026 218th Steffan153 🇫🇮 862 140 131ms 25 Jul 2024 218th emgordon154 862 140 23ms 10 Jun 2025 220th m-tkach 🇺🇦 862 157 25ms 5 Jul 2024 221st sean-niemann 🇺🇸 861 82 5ms 1 Jul 2024 222nd DialFrost 🇸🇬 861 108 150ms 24 May 2025 223rd DialFrost 🇸🇬 860 122 518ms 27 Nov 2024 224th Shanethegamer 🇺🇸 860 158 296ms 13 Sep 2024 225th MeWhenI 🇻🇦 859 133 43ms 13 Feb 2025 226th Steffan153 🇫🇮 858 115 2ms 1 Jul 2024 227th DialFrost 🇸🇬 858 136 14ms 4 Jul 2024 228th Shanethegamer 🇺🇸 858 155 194ms 16 Sep 2024 229th rucin93 🇵🇱 856 99 2ms 19 Nov 2025 229th GolfingSuccess 🇬🇷 856 99 2ms 20 Nov 2025 231st DialFrost 🇸🇬 856 110 42ms 28 Feb 2025 232nd anter69 🇭🇺 856 125 11ms 23 Jan 2026 233rd blaztoma 🇱🇹 855 81 10ms 16 days ago 234th kg583 🇺🇸 855 104 435ms 1 Jul 2024 235th Shanethegamer 🇺🇸 855 127 1,319ms 12 Sep 2024 236th sean-niemann 🇺🇸 855 157 3ms 24 Aug 2025 236th edsrzf 🇳🇿 855 157 3ms 14 days ago 238th ovs-code 🇩🇪 854 101 2ms 2 Jul 2024 238th nwellnhof 🇩🇪 854 101 2ms 2 Jul 2024 238th inventshah 854 101 2ms 2 Jul 2024 First Prev 161–240 of 733 Next Last