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?
Fractions 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 877th LHLaurini 🇧🇷 723 98 16ms 3 Jul 2024 877th RedzGoose 🇦🇺 723 98 18ms 10 Oct 2024 883rd djeedjay 🇳🇱 723 120 2ms 5 Sep 2021 883rd xiaoyiming123 723 120 1ms 23 Jul 2025 885th emgordon154 723 241 1,777ms 26 days ago 886th MaliPatuljak 722 172 404ms 19 Apr 2023 886th HumanoidCPU 722 172 479ms 8 Nov 2025 886th madex 🇩🇪 722 172 382ms 13 days ago 889th DialFrost 🇸🇬 721 324 1,490ms 21 Jan 2025 890th sircfenner 720 102 1ms 3 Sep 2021 890th languidlizard28 720 102 2ms 3 Sep 2021 890th StarmaQ 720 102 1ms 7 Sep 2021 890th RockOfStone 720 102 3ms 10 Mar 2024 894th daniel-cardone 720 164 1,375ms 23 Jun 2025 895th alicethecatwhisperermeow 719 145 433ms 7 Aug 2024 896th chubbc 717 68 285ms 28 Dec 2024 897th strout 717 149 142ms 14 Dec 2023 898th MichalMarsalek 🇨🇿 716 99 18ms 2 Nov 2021 898th CodyMiner 716 99 1,850ms 20 Nov 2021 898th cooljoseph1 716 99 17ms 6 May 2022 898th LogicalJoe 716 99 17ms 7 Oct 2022 898th dxf2026 716 99 16ms 5 Jul 2024 898th ahmetdemirag 🇨🇾 716 99 159ms 8 Dec 2024 898th Artemis21 🇬🇧 716 99 16ms 21 Jan 2025 905th snoozingnewt 🇨🇦 715 155 117ms 31 Oct 2025 906th klixel 🇨🇦 715 176 241ms 16 May 2023 907th janbehrens 🇩🇪 714 84 10ms 4 Sep 2021 907th fitzdotlol 🇺🇸 714 84 10ms 29 Mar 2022 907th jorduino 714 84 10ms 31 Oct 2022 907th Davr1 🇨🇿 714 84 11ms 26 Oct 2023 907th CaedenHarper 🇨🇦 714 84 14ms 23 Aug 2025 912th sultan 714 146 407ms 28 Feb 2024 913th razetime 713 42 2ms 24 Jan 2022 913th DaCuteRaccoon 713 42 2ms 30 Mar 2022 913th MeWhenI 🇻🇦 713 42 2ms 4 Aug 2022 913th bwenstar 713 42 3ms 11 Aug 2022 913th trist224 🇫🇷 713 42 2ms 28 Nov 2022 913th rucin93 🇵🇱 713 42 2ms 3 May 2023 913th snoozingnewt 🇨🇦 713 42 3ms 7 Sep 2023 913th neel11235813 713 42 3ms 20 Nov 2023 913th lifthrasiir 🇰🇷 713 42 11ms 29 Nov 2024 913th LostSyntax21 🇬🇧 713 42 3ms 19 Jan 2025 913th blaztoma 🇱🇹 713 42 2ms 27 Dec 2025 913th CornerMercury 🇬🇧 713 42 3ms 19 Jan 2026 925th sisyphus-ppcg 🇦🇺 713 111 123ms 15 Dec 2022 926th cmayer777 711 122 1ms 16 Oct 2022 926th NickTheEASDude 🇺🇸 711 122 1ms 15 May 2024 928th inventshah 711 171 3ms 23 Sep 2022 929th mousetail 🇳🇱 711 177 225ms 16 Jan 2024 930th SirBogman 🇺🇸 710 92 438ms 16 Jan 2024 931st Echriser 710 110 378ms 9 Nov 2022 931st Steffan153 🇫🇮 710 110 413ms 2 Mar 2023 931st GrayJoKing 🇦🇺 710 110 387ms 27 Mar 2023 934th janbehrens 🇩🇪 709 147 372ms 10 Jan 2022 934th roavin 709 147 409ms 29 Jun 2022 936th janbehrens 🇩🇪 709 175 439ms 10 Jan 2022 937th lifthrasiir 🇰🇷 709 223 14ms 19 Dec 2024 938th marcin7Cd 708 100 81ms 3 Sep 2021 938th didion0 🇺🇸 708 100 153ms 17 Feb 2022 938th jatloe 708 100 17ms 24 Jul 2024 938th RaBa21 🇭🇺 708 100 17ms 19 Jul 2025 938th JOrE20 708 100 17ms 15 Feb 2026 943rd m-tkach 🇺🇦 707 149 18ms 9 Mar 2023 944th MeWhenI 🇻🇦 707 167 1,261ms 7 Jun 2023 945th Lv0Sys 🇵🇱 706 69 313ms 5 Dec 2025 946th KrausRaus 🇺🇸 706 85 10ms 4 Sep 2021 946th uttumuttu 🇫🇮 706 85 10ms 4 Jan 2022 946th KatieLG 🇬🇧 706 85 13ms 7 Apr 2022 946th FlorianCassayre 🇫🇷 706 85 9ms 22 Sep 2022 946th trinityy-7 706 85 10ms 23 Jan 2024 946th RobertHoeh 706 85 10ms 1 Feb 2024 946th smclaughlin-cf 706 85 10ms 20 Mar 2025 946th jake6192 706 85 10ms 18 May 2025 946th kirjavascript 706 85 10ms 5 Aug 2025 955th ai-fischer 706 90 6ms 2 Oct 2021 956th NickTheEASDude 🇺🇸 706 104 1ms 17 Oct 2023 957th Andriamanitra 🇫🇮 705 117 4ms 17 Apr 2023 958th Yewzir 🇧🇪 705 123 237ms 16 May 2023 958th dokutan 705 123 241ms 29 Jun 2024 960th saito-ta 🇯🇵 705 188 2,043ms 8 Jun 2022 First Prev 881–960 of 2,002 Next Last