The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. 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 685th unfinishedprogram 891 44 9ms 4 Jul 2023 685th Davr1 🇨🇿 891 44 9ms 15 Oct 2023 685th Yewzir 🇧🇪 891 44 9ms 15 Oct 2023 685th dylanarmstrong 891 44 10ms 22 Jan 2024 685th hacker112 🇸🇪 891 44 10ms 22 Jun 2024 685th piano-miles 891 44 10ms 6 Sep 2024 685th kovdmm 891 44 9ms 13 Oct 2024 685th CaedenHarper 🇨🇦 891 44 9ms 22 Oct 2024 685th XenThe 🇬🇧 891 44 9ms 7 Jun 2025 685th olleicua 🇺🇸 891 44 9ms 13 Aug 2025 685th LordSir101 891 44 10ms 18 Aug 2025 685th Elkfoot2 891 44 9ms 10 Jan 2026 685th bac0id 891 44 17ms 27 Jan 2026 685th JOrE20 891 44 13ms 11 Feb 2026 685th FortuiteMan 🇫🇷 891 44 10ms 89 mins ago 736th clockworknazo 891 54 3ms 23 Oct 2022 737th lynn 891 56 9ms 16 Nov 2021 737th ovs-code 🇩🇪 891 56 10ms 29 Jun 2024 739th primo-ppcg 🇹🇭 891 131 11ms 2 Aug 2023 739th frankgraziano 891 131 12ms 30 Jan 2026 741st andersk 🇺🇸 890 60 125ms 20 Mar 2020 741st primo-ppcg 🇹🇭 890 60 117ms 2 May 2020 741st JayXon 🇺🇸 890 60 117ms 23 Aug 2021 741st Lydxn 🇨🇦 890 60 116ms 24 Aug 2021 741st lynn 890 60 110ms 10 Sep 2021 741st Super-Pizza 🇨🇦 890 60 128ms 22 May 2023 741st Steffan153 🇫🇮 890 60 129ms 18 hours ago 748th Lydxn 🇨🇦 889 52 4ms 12 May 2023 748th GrayJoKing 🇦🇺 889 52 3ms 14 Aug 2023 748th dokutan 889 52 4ms 25 Sep 2024 748th kg583 🇺🇸 889 52 4ms 10 Dec 2025 748th edsrzf 🇳🇿 889 52 4ms 14 Dec 2025 753rd saito-ta 🇯🇵 888 42 2ms 22 Jun 2023 754th kg583 🇺🇸 888 62 39ms 13 Feb 2025 755th YoranDS 888 80 62ms 29 May 2023 755th Walter225 888 80 71ms 10 Jul 2023 755th Mandrzejy 🇵🇱 888 80 61ms 22 Feb 2024 755th keelimeguy 🇺🇸 888 80 60ms 16 May 2025 755th GolfingSuccess 🇬🇷 888 80 58ms 2 Sep 2025 755th Andrey2001 888 80 57ms 25 Nov 2025 761st andersk 🇺🇸 887 59 1ms 20 Mar 2020 761st uw4 887 59 1ms 29 Aug 2020 761st janbehrens 🇩🇪 887 59 1ms 22 May 2021 761st lynn 887 59 1ms 2 Oct 2021 761st simon-biber 887 59 1ms 7 Feb 2022 761st solmyr2000 887 59 1ms 18 Jun 2022 761st LorenzoDeGaspari 887 59 2ms 20 Jun 2022 761st AlephSquirrel 887 59 1ms 18 Jul 2022 761st annaproxy 887 59 1ms 8 Jan 2023 761st b10011 🇫🇮 887 59 1ms 8 Jan 2023 761st YoranDS 887 59 1ms 29 May 2023 761st ngthanhtrung23 887 59 1ms 15 Mar 2024 761st orthoplex 🇨🇽 887 59 1ms 14 Jun 2024 761st qwertyuiop3 🇷🇺 887 59 2ms 2 Jun 2025 761st yanjs 887 59 1ms 5 Jul 2025 761st luuumine 🇫🇷 887 59 1ms 29 Oct 2025 777th voytxt 🇨🇿 887 68 477ms 25 Sep 2025 777th ScottHamper 887 68 479ms 30 Nov 2025 779th MWI-polygolf 886 46 81ms 18 Feb 2023 779th steffan-polygolf 886 46 80ms 19 Feb 2023 779th DialFrost 🇸🇬 886 46 87ms 8 Nov 2023 779th dokutan 886 46 80ms 25 Sep 2024 783rd GrayJoKing 🇦🇺 885 45 119ms 9 Feb 2022 783rd sean-niemann 🇺🇸 885 45 125ms 12 Apr 2022 783rd MeWhenI 🇻🇦 885 45 121ms 10 Oct 2022 783rd MWI-polygolf 885 45 126ms 18 Feb 2023 783rd steffan-polygolf 885 45 123ms 19 Feb 2023 783rd DialFrost 🇸🇬 885 45 133ms 8 Nov 2023 783rd dokutan 885 45 125ms 25 Sep 2024 790th edsrzf 🇳🇿 885 54 8ms 22 Feb 2026 791st ovs-code 🇩🇪 884 42 466ms 16 Jan 2024 791st Steffan153 🇫🇮 884 42 410ms 16 Jan 2024 791st MeWhenI 🇻🇦 884 42 399ms 13 Jul 2024 791st kg583 🇺🇸 884 42 467ms 31 Jul 2024 795th villfa 884 50 4ms 27 May 2019 795th UpwardProcess 884 50 5ms 30 Jul 2019 795th ondras 884 50 5ms 3 May 2020 795th cywong-amino 🇭🇰 884 50 4ms 20 May 2020 795th Attero 🇸🇪 884 50 5ms 31 Aug 2020 795th sisyphus-ppcg 🇦🇺 884 50 4ms 5 Nov 2020 First Prev 721–800 of 4,843 Next Last