The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 34 hours. Why not try and solve them ahead of time?
Leap Years 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 692nd NathanGabrielson 891 44 9ms 30 Mar 2022 692nd inverseLorentz 🇦🇺 891 44 10ms 28 Jun 2022 692nd two-bad 🇬🇧 891 44 10ms 5 Jul 2022 692nd aksyristos 891 44 9ms 28 Oct 2022 692nd scpchicken 🇵🇼 891 44 11ms 22 Feb 2023 692nd Kesefon 891 44 9ms 25 Apr 2023 692nd dteague3989 891 44 11ms 27 May 2023 692nd unfinishedprogram 891 44 10ms 4 Jul 2023 692nd Davr1 🇨🇿 891 44 10ms 15 Oct 2023 692nd Yewzir 🇧🇪 891 44 11ms 15 Oct 2023 692nd dylanarmstrong 891 44 10ms 22 Jan 2024 692nd hacker112 🇸🇪 891 44 10ms 22 Jun 2024 692nd piano-miles 891 44 10ms 6 Sep 2024 692nd kovdmm 891 44 12ms 13 Oct 2024 692nd CaedenHarper 🇨🇦 891 44 10ms 22 Oct 2024 692nd XenThe 🇬🇧 891 44 9ms 7 Jun 2025 692nd olleicua 🇺🇸 891 44 13ms 13 Aug 2025 692nd LordSir101 891 44 10ms 18 Aug 2025 692nd Elkfoot2 891 44 10ms 10 Jan 2026 692nd bac0id 891 44 10ms 27 Jan 2026 692nd JOrE20 891 44 10ms 11 Feb 2026 692nd FortuiteMan 🇫🇷 891 44 9ms 6 days ago 743rd clockworknazo 891 54 3ms 23 Oct 2022 744th lynn 891 56 9ms 16 Nov 2021 744th ovs-code 🇩🇪 891 56 10ms 29 Jun 2024 746th primo-ppcg 🇹🇭 891 131 11ms 2 Aug 2023 746th frankgraziano 891 131 12ms 30 Jan 2026 748th andersk 🇺🇸 890 60 138ms 20 Mar 2020 748th primo-ppcg 🇹🇭 890 60 114ms 2 May 2020 748th JayXon 🇺🇸 890 60 124ms 23 Aug 2021 748th Lydxn 🇨🇦 890 60 114ms 24 Aug 2021 748th lynn 890 60 119ms 10 Sep 2021 748th Super-Pizza 🇨🇦 890 60 141ms 22 May 2023 748th Steffan153 🇫🇮 890 60 131ms 6 days ago 755th Lydxn 🇨🇦 889 52 4ms 12 May 2023 755th GrayJoKing 🇦🇺 889 52 3ms 14 Aug 2023 755th dokutan 889 52 4ms 25 Sep 2024 755th kg583 🇺🇸 889 52 4ms 10 Dec 2025 755th edsrzf 🇳🇿 889 52 4ms 14 Dec 2025 760th saito-ta 🇯🇵 888 42 2ms 22 Jun 2023 761st kg583 🇺🇸 888 62 39ms 13 Feb 2025 762nd YoranDS 888 80 64ms 29 May 2023 762nd Walter225 888 80 87ms 10 Jul 2023 762nd Mandrzejy 🇵🇱 888 80 57ms 22 Feb 2024 762nd keelimeguy 🇺🇸 888 80 60ms 16 May 2025 762nd GolfingSuccess 🇬🇷 888 80 58ms 2 Sep 2025 762nd Andrey2001 888 80 60ms 25 Nov 2025 768th edsrzf 🇳🇿 887 54 6ms 22 Feb 2026 769th andersk 🇺🇸 887 59 1ms 20 Mar 2020 769th uw4 887 59 1ms 29 Aug 2020 769th janbehrens 🇩🇪 887 59 1ms 22 May 2021 769th lynn 887 59 1ms 2 Oct 2021 769th simon-biber 887 59 1ms 7 Feb 2022 769th solmyr2000 887 59 1ms 18 Jun 2022 769th LorenzoDeGaspari 887 59 2ms 20 Jun 2022 769th AlephSquirrel 887 59 1ms 18 Jul 2022 769th annaproxy 887 59 1ms 8 Jan 2023 769th b10011 🇫🇮 887 59 1ms 8 Jan 2023 769th YoranDS 887 59 1ms 29 May 2023 769th ngthanhtrung23 887 59 1ms 15 Mar 2024 769th orthoplex 🇨🇽 887 59 1ms 14 Jun 2024 769th qwertyuiop3 🇷🇺 887 59 2ms 2 Jun 2025 769th yanjs 887 59 1ms 5 Jul 2025 769th luuumine 🇫🇷 887 59 1ms 29 Oct 2025 785th voytxt 🇨🇿 887 68 477ms 25 Sep 2025 785th ScottHamper 887 68 479ms 30 Nov 2025 787th MWI-polygolf 886 46 79ms 18 Feb 2023 787th steffan-polygolf 886 46 83ms 19 Feb 2023 787th DialFrost 🇸🇬 886 46 98ms 8 Nov 2023 787th dokutan 886 46 84ms 25 Sep 2024 791st GrayJoKing 🇦🇺 885 45 119ms 9 Feb 2022 791st sean-niemann 🇺🇸 885 45 125ms 12 Apr 2022 791st MeWhenI 🇻🇦 885 45 121ms 10 Oct 2022 791st MWI-polygolf 885 45 126ms 18 Feb 2023 791st steffan-polygolf 885 45 123ms 19 Feb 2023 791st DialFrost 🇸🇬 885 45 133ms 8 Nov 2023 791st dokutan 885 45 125ms 25 Sep 2024 798th ovs-code 🇩🇪 884 42 466ms 16 Jan 2024 798th Steffan153 🇫🇮 884 42 410ms 16 Jan 2024 798th MeWhenI 🇻🇦 884 42 399ms 13 Jul 2024 First Prev 721–800 of 4,857 Next Last