The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 21 hours. Why not try and solve them ahead of time?
Fibonacci in Raku 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 73rd olivermrose 🇺🇸 800 20 109ms 20 Sep 2021 73rd scpchicken 🇵🇼 800 20 118ms 10 Mar 2022 73rd krcs 🇵🇱 800 20 114ms 21 Apr 2022 84th joaquinferrero 762 21 111ms 9 Oct 2017 84th Scimon 762 21 118ms 13 Dec 2017 84th polyrtm 762 21 120ms 17 Nov 2018 84th voytxt 🇨🇿 762 21 128ms 13 Mar 2022 84th astdefu 762 21 124ms 16 Dec 2022 84th 4hg 🇺🇸 762 21 129ms 9 Feb 2023 84th rcmlz 762 21 126ms 13 Apr 2024 84th HumanoidCPU 762 21 124ms 5 Nov 2024 84th emgordon154 762 21 143ms 13 Nov 2024 84th FortuiteMan 🇫🇷 762 21 117ms 10 Jul 2025 84th CaedenHarper 🇨🇦 762 21 119ms 26 Aug 2025 84th snoozingnewt 🇨🇦 762 21 115ms 19 Jan 2026 84th namelessiw 762 21 112ms 20 Jan 2026 84th FlyingPenguin223 762 21 114ms 20 Jan 2026 84th JOrE20 762 21 116ms 4 Feb 2026 99th ashtraypettingzoo 🇺🇸 727 22 111ms 3 Apr 2023 99th albanian-laundromat 727 22 116ms 19 Jan 2026 99th janAkali 🇷🇺 727 22 109ms 19 Jan 2026 99th Andrey2001 727 22 114ms 23 Jan 2026 103rd bduggan 696 23 119ms 19 Oct 2017 103rd molecules 696 23 132ms 27 Dec 2017 103rd madex 🇩🇪 696 23 108ms 20 Jan 2026 103rd ryyyn 🇺🇸 696 23 105ms 21 Jan 2026 107th dogbert17 667 24 120ms 3 Oct 2017 107th yokasuretsu 667 24 120ms 1 Jul 2018 107th minarjos 667 24 121ms 11 Jan 2021 107th Matter1024 🇮🇳 667 24 118ms 19 Jan 2026 107th vhoulbreque 🇫🇷 667 24 115ms 24 Jan 2026 107th themoonisacheese 667 24 113ms 26 Jan 2026 107th FoxInTheClouds 667 24 166ms 8 Feb 2026 114th antihec 640 25 111ms 17 Sep 2017 114th PaulHanson 640 25 130ms 1 Oct 2017 114th ObserverOfTime 640 25 127ms 18 Nov 2018 114th jjatria 640 25 114ms 2 Jul 2020 114th redstarrer 640 25 112ms 11 Jan 2021 114th annaproxy 640 25 105ms 4 Jan 2022 114th dokutan 640 25 111ms 14 Oct 2024 114th blaztoma 🇱🇹 640 25 106ms 19 Jan 2026 122nd MattOates 615 26 112ms 17 Sep 2017 122nd FCO 615 26 109ms 20 Jan 2018 124th perlpilot 593 27 121ms 19 Sep 2017 124th jslip 593 27 126ms 19 Jul 2018 124th janbehrens 🇩🇪 593 27 114ms 2 Jan 2021 124th kurkale6ka 593 27 120ms 1 Sep 2021 124th Lv0Sys 🇵🇱 593 27 119ms 25 Jan 2026 129th olleicua 🇺🇸 571 28 114ms 12 Feb 2024 130th massung 552 29 118ms 26 Mar 2019 130th giacomogallina 552 29 112ms 7 Jun 2019 130th anter69 🇭🇺 552 29 117ms 19 Jan 2026 133rd kevinmchung 533 30 116ms 7 Jan 2018 134th gustawdaniel 500 32 122ms 1 Apr 2018 134th Mr-Xcoder 500 32 122ms 18 Apr 2018 136th Cr3aHal0 485 33 126ms 5 Jul 2019 137th ohmycloud 457 35 121ms 19 Dec 2017 137th jaredcrystal 🇺🇸 457 35 125ms 17 Mar 2018 137th MatheusAvellar 🇧🇷 457 35 116ms 11 May 2021 137th Yax42 🇫🇷 457 35 112ms 20 Jan 2026 137th solisolu 457 35 111ms 21 Jan 2026 142nd kkoenig 444 36 117ms 22 Dec 2023 143rd CornerMercury 🇬🇧 432 37 110ms 19 Jan 2026 144th CedricGebistorf 421 38 136ms 6 Feb 2022 145th sukyoungjeong 410 39 111ms 27 Jun 2018 146th desecaw13 381 42 118ms 24 Jan 2025 147th AlephSquirrel 372 43 114ms 19 Jan 2026 148th christensendaniel 364 44 129ms 26 Aug 2023 149th marcin7Cd 356 45 117ms 12 Jan 2021 149th epic-programmer-guy 356 45 121ms 3 Jan 2024 151st madeforlosers 333 48 115ms 22 Nov 2024 152nd alphafalfa 314 51 116ms 9 Dec 2024 152nd Florian-Mt 314 51 113ms 20 Jan 2026 154th ALANVF 302 53 120ms 17 Nov 2018 155th MichaelMBradley 🇨🇦 296 54 128ms 22 Mar 2022 156th myfatemi04 291 55 121ms 7 Jan 2018 156th msbranicky 291 55 110ms 23 Sep 2023 158th CheeseCake628 🇳🇴 286 56 118ms 14 Feb 2023 159th wictory 276 58 113ms 19 Sep 2017 159th dillon-duncando 276 58 629ms 21 Dec 2021 First Prev 81–160 of 185 Next Last
