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 160th Bulmenisaurus 877 122 11ms 9 Oct 2024 160th solisolu 877 122 12ms 9 Nov 2025 160th KatieLG 🇬🇧 877 122 11ms 7 Jan 2026 160th ryyyn 🇺🇸 877 122 30ms 10 Feb 2026 165th Shanethegamer 🇺🇸 876 117 2,737ms 25 Oct 2024 166th inventshah 876 125 464ms 11 Dec 2025 166th nwellnhof 🇩🇪 876 125 458ms 22 Jan 2026 168th albanian-laundromat 876 155 285ms 25 Feb 2026 169th emgordon154 875 40 58ms 21 Nov 2025 170th GrayJoKing 🇦🇺 875 91 1,253ms 6 Jul 2024 171st JayXon 🇺🇸 875 120 451ms 5 Jul 2024 172nd Steffan153 🇫🇮 875 130 133ms 1 Jul 2024 172nd ovs-code 🇩🇪 875 130 161ms 2 Jul 2024 174th pardouin 🇫🇷 874 75 35ms 25 Aug 2025 175th DialFrost 🇸🇬 873 100 20ms 15 Dec 2024 176th IanUtley 873 105 15ms 1 Jul 2024 176th GrayJoKing 🇦🇺 873 105 16ms 3 Jul 2024 178th Shanethegamer 🇺🇸 872 115 5ms 13 Sep 2024 178th kg583 🇺🇸 872 115 4ms 24 days ago 180th MeWhenI 🇻🇦 872 117 387ms 19 Jun 2025 180th sean-niemann 🇺🇸 872 117 403ms 20 Jun 2025 180th stefangimmillaro 872 117 395ms 20 Jun 2025 183rd JayXon 🇺🇸 871 99 2ms 7 Jul 2024 184th JayXon 🇺🇸 871 154 2ms 7 Jul 2024 184th DialFrost 🇸🇬 871 154 3ms 28 Nov 2025 186th stefangimmillaro 871 156 316ms 22 Aug 2024 187th MeWhenI 🇻🇦 870 62 7ms 7 Aug 2024 188th Shanethegamer 🇺🇸 870 119 39ms 15 Sep 2024 189th bnic24 870 123 11ms 29 Jul 2024 189th iosovi 🇷🇴 870 123 11ms 9 Aug 2024 189th plcc0 870 123 11ms 4 Apr 2025 189th KasperKivimaeki 🇫🇮 870 123 11ms 5 Jul 2025 189th fuzzylojik-golf 🇺🇸 870 123 11ms 6 Jul 2025 189th rucin93 🇵🇱 870 123 11ms 6 Jul 2025 189th Matter1024 🇮🇳 870 123 12ms 27 days ago 196th ovs-code 🇩🇪 869 126 436ms 1 Jul 2024 197th Shanethegamer 🇺🇸 868 113 74ms 5 Dec 2024 198th albanian-laundromat 867 84 793ms 8 Feb 2026 199th ovs-code 🇩🇪 867 121 452ms 27 Jul 2024 200th Shanethegamer 🇺🇸 867 123 7ms 12 Sep 2024 201st KrausRaus 🇺🇸 866 80 10ms 2 Jul 2024 201st duckyluuk 🇳🇱 866 80 10ms 3 Sep 2024 201st Shanethegamer 🇺🇸 866 80 12ms 13 Sep 2024 204th Steffan153 🇫🇮 866 131 31ms 12 Feb 2026 205th ovs-code 🇩🇪 865 99 90ms 11 Dec 2025 206th edsrzf 🇳🇿 865 132 39ms 24 May 2025 206th kg583 🇺🇸 865 132 38ms 24 May 2025 208th sean-niemann 🇺🇸 864 98 2ms 19 Nov 2025 209th Steffan153 🇫🇮 864 100 115ms 5 Jul 2024 210th SirBogman 🇺🇸 864 103 450ms 4 Jul 2024 211th sean-niemann 🇺🇸 864 134 106ms 1 Jul 2024 211th MeWhenI 🇻🇦 864 134 106ms 1 Jul 2024 213th error256 863 76 39ms 1 Jul 2024 214th mousetail 🇳🇱 863 124 11ms 2 Jul 2024 214th FlorianCassayre 🇫🇷 863 124 11ms 6 Jul 2024 214th codingisgreatbutiamnot 863 124 11ms 24 Aug 2024 214th mathisfun271 863 124 33ms 3 Oct 2024 214th Lv0Sys 🇵🇱 863 124 11ms 23 Feb 2026 219th Steffan153 🇫🇮 862 140 131ms 25 Jul 2024 219th emgordon154 862 140 23ms 10 Jun 2025 221st m-tkach 🇺🇦 862 157 25ms 5 Jul 2024 222nd sean-niemann 🇺🇸 861 82 5ms 1 Jul 2024 223rd DialFrost 🇸🇬 861 108 150ms 24 May 2025 224th DialFrost 🇸🇬 860 122 518ms 27 Nov 2024 225th Shanethegamer 🇺🇸 860 158 296ms 13 Sep 2024 226th MeWhenI 🇻🇦 859 133 43ms 13 Feb 2025 227th Steffan153 🇫🇮 858 115 2ms 1 Jul 2024 228th DialFrost 🇸🇬 858 136 14ms 4 Jul 2024 229th Shanethegamer 🇺🇸 858 155 194ms 16 Sep 2024 230th rucin93 🇵🇱 856 99 2ms 19 Nov 2025 230th GolfingSuccess 🇬🇷 856 99 2ms 20 Nov 2025 232nd DialFrost 🇸🇬 856 110 42ms 28 Feb 2025 233rd anter69 🇭🇺 856 125 11ms 23 Jan 2026 234th blaztoma 🇱🇹 855 81 10ms 17 days ago 235th kg583 🇺🇸 855 104 435ms 1 Jul 2024 236th Shanethegamer 🇺🇸 855 127 1,319ms 12 Sep 2024 237th sean-niemann 🇺🇸 855 157 3ms 24 Aug 2025 237th edsrzf 🇳🇿 855 157 3ms 15 days ago 239th ovs-code 🇩🇪 854 101 2ms 2 Jul 2024 239th nwellnhof 🇩🇪 854 101 2ms 2 Jul 2024 First Prev 161–240 of 734 Next Last