The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Look and Say in all languages 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 881st annaproxy 594 150 402ms 5 May 2022 881st arcpolaris 594 150 448ms 13 Nov 2025 883rd alemelis 593 105 349ms 19 Jul 2024 884th ludwig-n 592 99 10ms 5 Apr 2021 884th jhpaques 🇫🇷 592 99 11ms 29 Jul 2022 884th aksyristos 592 99 11ms 6 Feb 2023 884th TaserTheFox 🇺🇸 592 99 11ms 8 May 2023 884th suwat513 592 99 11ms 19 Jun 2023 884th quimey 592 99 16ms 26 Jun 2023 884th htareque 592 99 11ms 18 Nov 2023 884th RobertHoeh 592 99 11ms 2 Dec 2024 884th andrewjc2000 592 99 10ms 28 Feb 2025 884th cefqrn 592 99 10ms 10 Jul 2025 884th SectorCorruptor 592 99 11ms 3 Feb 2026 895th BambooleanLogic 🇸🇪 591 98 10ms 11 Jan 2023 895th neel11235813 591 98 11ms 18 Feb 2023 895th eranws 591 98 11ms 18 Mar 2024 898th Shanethegamer 🇺🇸 591 127 111ms 19 May 2023 899th KasperKivimaeki 🇫🇮 591 171 444ms 9 Dec 2025 900th eldritchconundrum 590 151 390ms 21 Nov 2021 901st janbehrens 🇩🇪 590 203 278ms 4 Sep 2021 901st JRaspass 🇬🇧 590 203 325ms 23 Sep 2022 903rd SirFireball3521 589 58 150ms 23 Mar 2023 903rd CaedenHarper 🇨🇦 589 58 144ms 11 Sep 2025 905th janbehrens 🇩🇪 588 131 11ms 10 May 2021 906th yzhs 🇩🇪 587 60 3ms 25 Dec 2020 906th DaCuteRaccoon 587 60 3ms 23 Apr 2022 908th nullie 587 200 227ms 31 Dec 2024 909th OllieBoyne 🇬🇧 586 100 10ms 17 Sep 2021 909th face0xff 586 100 16ms 19 Oct 2021 909th pascscha 586 100 15ms 28 Mar 2022 909th osmith93 586 100 11ms 28 Jun 2022 909th moustave 586 100 16ms 19 Nov 2024 909th TheZwierzLF 🇵🇱 586 100 12ms 25 May 2025 909th jtaxen 586 100 11ms 15 Oct 2025 909th vgamula 🇺🇦 586 100 11ms 9 Feb 2026 909th solisolu 586 100 15ms 16 Feb 2026 918th Shanethegamer 🇺🇸 586 169 7ms 30 Aug 2024 919th GeorgeStechman 🇬🇧 585 99 9ms 18 Nov 2022 919th Ultra814 585 99 10ms 29 Nov 2025 921st Axsag 🇫🇷 584 120 4ms 28 Jul 2021 921st me42th 584 120 5ms 16 Jun 2025 923rd msbranicky 583 164 2ms 28 Sep 2023 924th m-tkach 🇺🇦 583 180 28ms 5 May 2025 925th didion0 🇺🇸 583 259 2ms 30 Apr 2021 926th rvdnieuwendijk 🇳🇱 582 94 259ms 27 Dec 2020 927th ehulinsky 🇺🇸 580 101 11ms 10 Nov 2021 927th commandz0 🇺🇸 580 101 15ms 17 Nov 2023 927th hellwue 580 101 11ms 21 Jun 2024 927th hiichbindermax 580 101 11ms 21 Jun 2024 927th souta-1326 580 101 16ms 1 Apr 2025 932nd DaCuteRaccoon 579 59 132ms 23 Apr 2022 933rd razetime 579 121 4ms 24 Jan 2022 933rd MeWhenI 🇻🇦 579 121 4ms 28 May 2023 935th bac0id 579 154 409ms 30 Jun 2024 935th tomh1012 579 154 424ms 21 Jan 2026 937th jared-hughes 578 175 2,887ms 24 Jun 2022 937th janbehrens 🇩🇪 578 175 2,817ms 20 Nov 2022 939th HumanoidCPU 578 180 507ms 8 Nov 2025 940th Re-Adventures 🇮🇳 578 203 158ms 7 Jun 2023 941st MeWhenI 🇻🇦 578 234 57ms 13 Jul 2021 942nd pandapawskat 576 130 1ms 1 Dec 2020 942nd Lydxn 🇨🇦 576 130 1ms 4 Dec 2020 944th AkashTandon167 575 102 11ms 2 Dec 2020 944th abba23 575 102 10ms 13 Jun 2021 944th olavaga 575 102 10ms 15 Aug 2021 944th Anonymousellama21 575 102 15ms 15 Jun 2022 944th Mikey-Beep 🇬🇧 575 102 11ms 17 Jun 2022 944th grave367 575 102 11ms 5 Mar 2023 944th msbranicky 575 102 10ms 10 Aug 2023 944th m42km 575 102 15ms 25 Nov 2023 944th eddvrs 575 102 11ms 22 Dec 2023 944th sultan 575 102 11ms 5 Mar 2024 944th Languag3 575 102 10ms 9 Oct 2024 944th KasperKivimaeki 🇫🇮 575 102 10ms 10 Jul 2025 944th LostSyntax21 🇬🇧 575 102 15ms 6 Jan 2026 957th janbehrens 🇩🇪 574 148 470ms 24 Mar 2022 958th AnnoyedArt1256 573 101 11ms 11 Jan 2022 959th boboquack 573 183 27ms 30 Dec 2023 960th hrubymar10 573 209 279ms 21 Feb 2024 First Prev 881–960 of 2,091 Next Last
