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?
ASCII Table 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 401st juliansiebert 🇩🇪 826 91 273ms 2 Dec 2023 402nd davecame 826 104 10ms 11 Oct 2023 403rd emgordon154 826 108 4ms 6 Jun 2025 404th roavin 825 148 403ms 21 Oct 2023 405th DialFrost 🇸🇬 825 157 383ms 24 Sep 2025 405th MeWhenI 🇻🇦 825 157 533ms 7 Nov 2025 407th DialFrost 🇸🇬 825 309 12ms 23 Apr 2025 408th AlephSquirrel 824 101 485ms 21 Jan 2024 409th MichalMarsalek 🇨🇿 824 135 124ms 26 Mar 2022 409th MeWhenI 🇻🇦 824 135 117ms 30 Jan 2023 409th Shanethegamer 🇺🇸 824 135 121ms 21 Mar 2023 412th GrayJoKing 🇦🇺 823 130 7ms 27 Nov 2025 413th mrmena 🇦🇺 823 136 40ms 11 May 2024 413th dokutan 823 136 39ms 15 Aug 2024 415th inventshah 823 146 429ms 17 Nov 2022 415th roupiq 🇵🇱 823 146 65ms 24 Feb 2024 417th inventshah 822 157 2ms 19 Aug 2023 418th stefangimmillaro 821 122 2,826ms 15 Nov 2024 419th Yewzir 🇧🇪 821 132 7ms 16 Dec 2023 420th MeWhenI 🇻🇦 820 161 109ms 8 Mar 2023 421st emgordon154 819 72 41ms 9 Sep 2025 422nd sultan 819 149 412ms 24 May 2022 423rd annaproxy 818 105 10ms 27 Mar 2022 423rd TFeld00 🇩🇰 818 105 10ms 3 Oct 2022 423rd rollershutter 818 105 10ms 14 Oct 2024 423rd solisolu 818 105 9ms 17 Oct 2025 423rd CornerMercury 🇬🇧 818 105 10ms 20 Jan 2026 428th MeWhenI 🇻🇦 818 109 4ms 16 Aug 2024 429th blaztoma 🇱🇹 818 143 107ms 5 Jan 2026 430th m-tkach 🇺🇦 818 147 57ms 29 Mar 2022 430th jared-hughes 818 147 446ms 24 Jun 2022 430th janbehrens 🇩🇪 818 147 61ms 16 Nov 2022 433rd scpchicken 🇵🇼 818 165 233ms 2 Jan 2023 434th MaxCastella 🇫🇷 817 92 276ms 4 Aug 2022 434th Feniske 🇫🇷 817 92 280ms 4 Aug 2022 436th snoozingnewt 🇨🇦 817 137 40ms 7 Dec 2025 437th BlobTheKat 817 142 10ms 18 Jul 2022 437th janbehrens 🇩🇪 817 142 10ms 16 Nov 2022 437th Lv0Sys 🇵🇱 817 142 11ms 27 Feb 2026 440th MeWhenI 🇻🇦 816 102 470ms 7 Jul 2025 441st m-tkach 🇺🇦 816 126 2ms 29 Mar 2022 441st Alex-x90 🇺🇸 816 126 1ms 15 May 2023 443rd MeWhenI 🇻🇦 816 158 2ms 10 Sep 2022 444th stefangimmillaro 815 162 123ms 3 Jun 2022 444th Shanethegamer 🇺🇸 815 162 111ms 3 Jun 2022 446th Shanethegamer 🇺🇸 815 195 1,458ms 2 Apr 2025 447th glatzert 814 150 394ms 28 Apr 2023 447th FluffDerg 814 150 383ms 21 Aug 2024 449th Shanethegamer 🇺🇸 813 123 1ms 21 Mar 2023 450th AlephSquirrel 812 135 6ms 3 Oct 2024 451st frnco 812 137 80ms 6 Jun 2022 451st GrayJoKing 🇦🇺 812 137 122ms 25 days ago 453rd MeWhenI 🇻🇦 812 148 59ms 8 May 2022 453rd Alex-x90 🇺🇸 812 148 60ms 3 Oct 2022 455th JOrE20 812 189 27ms 3 Feb 2026 456th KrausRaus 🇺🇸 811 143 10ms 28 Mar 2022 456th didion0 🇺🇸 811 143 10ms 14 Apr 2022 456th tayloia 🇬🇧 811 143 11ms 12 Jan 2023 459th Shanethegamer 🇺🇸 811 159 2ms 21 Mar 2023 460th sisyphus-ppcg 🇦🇺 811 204 1ms 15 Jul 2022 461st OhmNomNom 810 93 35ms 20 Oct 2022 462nd prplz 🇦🇺 810 106 10ms 28 Mar 2022 462nd Yewzir 🇧🇪 810 106 9ms 7 Dec 2023 462nd blaztoma 🇱🇹 810 106 10ms 5 Jan 2026 462nd Flekay 🇩🇪 810 106 10ms 19 Feb 2026 462nd snoozingnewt 🇨🇦 810 106 10ms 20 Feb 2026 462nd dokutan 810 106 10ms 15 days ago 468th dokutan 810 126 3ms 31 Jul 2024 468th emgordon154 810 126 4ms 23 Dec 2024 470th dokutan 810 140 2ms 20 Apr 2025 471st primo-ppcg 🇹🇭 809 88 146ms 5 Dec 2022 472nd Attero 🇸🇪 809 127 1ms 3 Aug 2022 472nd janbehrens 🇩🇪 809 127 2ms 16 Nov 2022 472nd roupiq 🇵🇱 809 127 1ms 24 Feb 2024 475th dokutan 809 134 8ms 31 Jul 2024 476th stefangimmillaro 809 160 502ms 6 Oct 2025 477th bizy-coder 808 103 470ms 15 Jan 2024 477th Yewzir 🇧🇪 808 103 460ms 4 Feb 2024 479th m-tkach 🇺🇦 808 151 446ms 1 Apr 2022 480th dpethes 808 190 55ms 12 Dec 2025 First Prev 401–480 of 2,336 Next Last