The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 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 641st scpchicken 🇵🇼 761 99 35ms 1 Apr 2022 641st olivermrose 🇺🇸 761 99 39ms 14 Apr 2022 641st jared-hughes 761 99 34ms 12 Sep 2022 644th SteveHales 761 124 80ms 15 Oct 2025 645th adriweb 🇫🇷 761 135 2ms 19 Aug 2024 646th bac0id 761 158 61ms 30 Jan 2026 647th SirFireball3521 760 113 9ms 27 Jan 2023 647th mathisfun271 760 113 10ms 15 Dec 2023 647th fourth-bit 760 113 10ms 4 Jul 2024 647th Bulmenisaurus 760 113 9ms 28 Oct 2024 647th ahmetdemirag 🇨🇾 760 113 10ms 12 Mar 2025 647th albanian-laundromat 760 113 10ms 13 Jul 2025 647th GodlyProgrammer1 760 113 10ms 27 Nov 2025 647th FoxInTheClouds 760 113 10ms 8 Feb 2026 655th annaproxy 758 151 115ms 30 Mar 2022 656th two-bad 🇬🇧 758 153 10ms 6 Feb 2024 656th smclaughlin-cf 758 153 11ms 18 Mar 2025 656th AnAwesomGuy 758 153 10ms 21 Dec 2025 656th JOrE20 758 153 10ms 3 Feb 2026 660th emgordon154 758 203 27ms 7 hours ago 661st SirBogman 🇺🇸 757 94 124ms 26 Mar 2022 662nd SirBogman 🇺🇸 757 110 453ms 20 Jan 2024 663rd rucin93 🇵🇱 757 171 374ms 24 Sep 2025 663rd h3ra993huskp 🇯🇵 757 171 519ms 30 Nov 2025 665th GolfingSuccess 🇬🇷 756 78 50ms 22 Jul 2022 665th plcc0 756 78 42ms 31 Jan 2026 667th cmayer777 756 136 1ms 14 Oct 2022 668th MeWhenI 🇻🇦 756 150 1ms 20 Feb 2023 668th Shanethegamer 🇺🇸 756 150 2ms 21 Mar 2023 670th Shanethegamer 🇺🇸 756 159 439ms 21 Mar 2023 671st Shanethegamer 🇺🇸 755 191 290ms 7 Feb 2024 672nd DialFrost 🇸🇬 754 91 2ms 10 Feb 2024 673rd DialFrost 🇸🇬 754 112 957ms 4 Sep 2025 674th albanian-laundromat 754 204 27ms 12 days ago 675th Yewzir 🇧🇪 754 223 1,693ms 17 May 2024 676th Shanethegamer 🇺🇸 753 100 37ms 21 Mar 2023 676th mikiymk 753 100 33ms 21 Sep 2023 676th D-MOVE 🇵🇭 753 100 36ms 5 Dec 2025 679th CedricGebistorf 753 114 10ms 1 Apr 2022 679th SirBogman 🇺🇸 753 114 9ms 10 May 2022 679th Educorreia932 753 114 10ms 21 Jun 2022 679th betaveros 753 114 10ms 9 Aug 2022 679th commandz0 🇺🇸 753 114 10ms 20 Sep 2022 679th anter69 🇭🇺 753 114 10ms 23 Feb 2023 679th TaserTheFox 🇺🇸 753 114 11ms 15 May 2023 679th InigoK 🇺🇸 753 114 9ms 27 May 2023 679th janbehrens 🇩🇪 753 114 10ms 17 Jun 2023 679th neihousaigaai 753 114 10ms 18 Feb 2024 679th ndren 753 114 10ms 23 Jun 2024 679th emgordon154 753 114 10ms 12 Apr 2025 679th Lv0Sys 🇵🇱 753 114 10ms 27 Feb 2026 692nd pschmid0 🇺🇸 753 120 5ms 7 Nov 2022 692nd arobson13 🇨🇦 753 120 4ms 28 Apr 2023 694th GeorgeStechman 🇬🇧 753 154 12ms 7 Jun 2022 694th emgordon154 753 154 10ms 7 Aug 2024 694th denis-jasselette 753 154 10ms 18 Oct 2025 697th Yewzir 🇧🇪 752 133 1ms 22 May 2023 698th janbehrens 🇩🇪 751 100 260ms 3 Dec 2023 699th Shanethegamer 🇺🇸 751 146 5ms 10 Mar 2023 700th KayzaFlo 751 160 64ms 3 Oct 2024 701st emgordon154 750 111 477ms 12 Apr 2025 702nd LogicalJoe 750 137 1ms 4 May 2023 702nd wansacis 🇩🇪 750 137 1ms 16 Aug 2024 702nd KayzaFlo 750 137 2ms 3 Oct 2024 702nd tmyt 750 137 2ms 19 Jan 2026 706th snoozingnewt 🇨🇦 750 176 98ms 2 Nov 2025 706th kaascevich 750 176 2,045ms 8 Dec 2025 708th Shanethegamer 🇺🇸 750 180 133ms 10 Mar 2023 709th dylanarmstrong 749 155 14ms 24 Jan 2024 710th primo-ppcg 🇹🇭 749 173 445ms 4 Apr 2022 711th Natanaelel 🇸🇪 748 101 3ms 22 Jun 2023 712th rucin93 🇵🇱 748 146 142ms 5 Jan 2025 713th Maltaran 🇵🇱 747 100 54ms 26 days ago 714th Heathcorp 🇦🇺 747 115 11ms 5 Jun 2022 714th kacogg5 747 115 9ms 20 Sep 2022 714th Just4FunCoder 747 115 10ms 7 Dec 2023 714th madex 🇩🇪 747 115 9ms 9 Jul 2024 714th LostSyntax21 🇬🇧 747 115 10ms 11 Sep 2024 714th FortuiteMan 🇫🇷 747 115 10ms 10 Oct 2024 714th croc54 747 115 10ms 23 Dec 2024 First Prev 641–720 of 2,338 Next Last