The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 28 hours. Why not try and solve them ahead of time?
Fibonacci in Go in chars. 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 Chars Time Submitted 157th JesseNoEyes 🇺🇸 857 91 273ms 15 Jan 2026 157th JOrE20 857 91 270ms 26 Feb 2026 163rd oceko 848 92 273ms 26 Nov 2022 163rd charliegaming 848 92 276ms 3 Oct 2023 165th HassanAliKadhem 🇧🇭 839 93 313ms 3 Aug 2023 165th KrausRaus 🇺🇸 839 93 291ms 12 Jan 2025 167th sech1p 🇵🇱 830 94 289ms 26 Jun 2021 168th destofr 821 95 298ms 23 Aug 2022 168th jtaxen 821 95 292ms 30 Mar 2024 170th nico-bachner 813 96 292ms 28 Dec 2020 171st guywithnose 804 97 290ms 12 May 2023 171st azure-blondon 804 97 283ms 7 May 2024 173rd GameChaos 788 99 290ms 18 Apr 2020 173rd eiburns 788 99 280ms 13 Jan 2022 175th ahshum 772 101 297ms 20 Apr 2020 175th phpboyscout 772 101 300ms 26 May 2021 177th Mandrzejy 🇵🇱 750 104 286ms 16 Apr 2024 178th MisterrLuck 743 105 301ms 13 Sep 2023 179th martinschneider 736 106 295ms 21 Apr 2020 179th Thund3rPat 736 106 293ms 30 Apr 2020 179th mclbrian 736 106 293ms 19 Aug 2022 179th zakariamouhid 736 106 284ms 10 Jan 2023 179th Zach1031 736 106 297ms 15 Nov 2025 184th timpauls 729 107 289ms 29 Oct 2021 184th Pyro569 729 107 292ms 25 Jun 2023 186th MF-devs 703 111 282ms 16 Aug 2022 187th ze-h 🇺🇸 678 115 292ms 28 Feb 2022 188th hotmanga 672 116 294ms 30 Oct 2023 188th xbxbxb007 672 116 295ms 11 Jan 2024 190th henkman 655 119 300ms 1 Jun 2020 191st xnacly 🇩🇪 639 122 294ms 5 Jul 2023 192nd Adix-null 🇱🇹 629 124 297ms 30 Jul 2023 193rd Techassi 609 128 305ms 20 Apr 2020 193rd sbercx 609 128 301ms 14 Jul 2021 193rd cingulataluke 609 128 298ms 2 Jun 2024 196th ThomasDotCodes 605 129 297ms 15 Apr 2020 197th Bodo171 600 130 280ms 15 Jan 2023 198th dillon-duncando 586 133 301ms 21 Dec 2021 198th Mikey-Beep 🇬🇧 586 133 313ms 2 Oct 2022 200th rifatx 582 134 292ms 24 Jul 2024 201st ibeucaly 578 135 315ms 7 Oct 2022 201st sm1lko 578 135 289ms 14 Dec 2022 203rd eli-siegel 574 136 309ms 23 Jun 2023 204th Kacarott 🇦🇺 561 139 290ms 29 Aug 2024 205th Pro-Haker 🇵🇱 557 140 293ms 28 Feb 2026 206th angelcerveraroldan 549 142 290ms 28 Aug 2020 207th mazzegi 545 143 289ms 19 Apr 2020 208th steven-purcell 523 149 296ms 28 Jul 2023 209th DaCuteRaccoon 520 150 280ms 3 Apr 2022 210th kypi 517 151 306ms 15 Feb 2021 211th DataResearch 513 152 284ms 2 Jan 2022 212th brandentimm 510 153 281ms 15 Apr 2020 213th Noah-Fox 443 176 294ms 1 Jun 2022 214th Intevel 🇩🇪 431 181 292ms 5 Jul 2023 214th HumanoidCPU 431 181 295ms 26 Aug 2024 216th KatieLG-Transpiler 🇬🇧 426 183 294ms 24 Jun 2022 217th kicco 411 190 299ms 20 Apr 2020 218th mokymok 🇺🇸 370 211 277ms 9 Nov 2021 219th retrohun 361 216 276ms 27 Dec 2022 219th Mabeloid 🇳🇴 361 216 288ms 18 Sep 2024 221st MikeyIO 336 232 295ms 15 Apr 2020 222nd rtlopez796 326 239 296ms 2 Mar 2022 222nd boykonet 326 239 298ms 5 Mar 2025 First Prev 161–223 of 223
