The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 687th Kesefon 891 44 9ms 25 Apr 2023 687th dteague3989 891 44 11ms 27 May 2023 687th unfinishedprogram 891 44 10ms 4 Jul 2023 687th Davr1 🇨🇿 891 44 10ms 15 Oct 2023 687th Yewzir 🇧🇪 891 44 11ms 15 Oct 2023 687th dylanarmstrong 891 44 10ms 22 Jan 2024 687th hacker112 🇸🇪 891 44 10ms 22 Jun 2024 687th piano-miles 891 44 10ms 6 Sep 2024 687th kovdmm 891 44 12ms 13 Oct 2024 687th CaedenHarper 🇨🇦 891 44 10ms 22 Oct 2024 687th XenThe 🇬🇧 891 44 9ms 7 Jun 2025 687th olleicua 🇺🇸 891 44 13ms 13 Aug 2025 687th LordSir101 891 44 10ms 18 Aug 2025 687th Elkfoot2 891 44 10ms 10 Jan 2026 687th bac0id 891 44 10ms 27 Jan 2026 687th JOrE20 891 44 10ms 11 Feb 2026 687th FortuiteMan 🇫🇷 891 44 9ms 3 days ago 738th clockworknazo 891 54 3ms 23 Oct 2022 739th lynn 891 56 9ms 16 Nov 2021 739th ovs-code 🇩🇪 891 56 10ms 29 Jun 2024 741st primo-ppcg 🇹🇭 891 131 11ms 2 Aug 2023 741st frankgraziano 891 131 12ms 30 Jan 2026 743rd andersk 🇺🇸 890 60 138ms 20 Mar 2020 743rd primo-ppcg 🇹🇭 890 60 114ms 2 May 2020 743rd JayXon 🇺🇸 890 60 124ms 23 Aug 2021 743rd Lydxn 🇨🇦 890 60 114ms 24 Aug 2021 743rd lynn 890 60 119ms 10 Sep 2021 743rd Super-Pizza 🇨🇦 890 60 141ms 22 May 2023 743rd Steffan153 🇫🇮 890 60 131ms 4 days ago 750th Lydxn 🇨🇦 889 52 4ms 12 May 2023 750th GrayJoKing 🇦🇺 889 52 3ms 14 Aug 2023 750th dokutan 889 52 4ms 25 Sep 2024 750th kg583 🇺🇸 889 52 4ms 10 Dec 2025 750th edsrzf 🇳🇿 889 52 4ms 14 Dec 2025 755th saito-ta 🇯🇵 888 42 2ms 22 Jun 2023 756th kg583 🇺🇸 888 62 39ms 13 Feb 2025 757th YoranDS 888 80 64ms 29 May 2023 757th Walter225 888 80 87ms 10 Jul 2023 757th Mandrzejy 🇵🇱 888 80 57ms 22 Feb 2024 757th keelimeguy 🇺🇸 888 80 60ms 16 May 2025 757th GolfingSuccess 🇬🇷 888 80 58ms 2 Sep 2025 757th Andrey2001 888 80 60ms 25 Nov 2025 763rd andersk 🇺🇸 887 59 1ms 20 Mar 2020 763rd uw4 887 59 1ms 29 Aug 2020 763rd janbehrens 🇩🇪 887 59 1ms 22 May 2021 763rd lynn 887 59 1ms 2 Oct 2021 763rd simon-biber 887 59 1ms 7 Feb 2022 763rd solmyr2000 887 59 1ms 18 Jun 2022 763rd LorenzoDeGaspari 887 59 2ms 20 Jun 2022 763rd AlephSquirrel 887 59 1ms 18 Jul 2022 763rd annaproxy 887 59 1ms 8 Jan 2023 763rd b10011 🇫🇮 887 59 1ms 8 Jan 2023 763rd YoranDS 887 59 1ms 29 May 2023 763rd ngthanhtrung23 887 59 1ms 15 Mar 2024 763rd orthoplex 🇨🇽 887 59 1ms 14 Jun 2024 763rd qwertyuiop3 🇷🇺 887 59 2ms 2 Jun 2025 763rd yanjs 887 59 1ms 5 Jul 2025 763rd luuumine 🇫🇷 887 59 1ms 29 Oct 2025 779th voytxt 🇨🇿 887 68 477ms 25 Sep 2025 779th ScottHamper 887 68 479ms 30 Nov 2025 781st MWI-polygolf 886 46 79ms 18 Feb 2023 781st steffan-polygolf 886 46 83ms 19 Feb 2023 781st DialFrost 🇸🇬 886 46 98ms 8 Nov 2023 781st dokutan 886 46 84ms 25 Sep 2024 785th GrayJoKing 🇦🇺 885 45 119ms 9 Feb 2022 785th sean-niemann 🇺🇸 885 45 125ms 12 Apr 2022 785th MeWhenI 🇻🇦 885 45 121ms 10 Oct 2022 785th MWI-polygolf 885 45 126ms 18 Feb 2023 785th steffan-polygolf 885 45 123ms 19 Feb 2023 785th DialFrost 🇸🇬 885 45 133ms 8 Nov 2023 785th dokutan 885 45 125ms 25 Sep 2024 792nd edsrzf 🇳🇿 885 54 6ms 22 Feb 2026 793rd ovs-code 🇩🇪 884 42 466ms 16 Jan 2024 793rd Steffan153 🇫🇮 884 42 410ms 16 Jan 2024 793rd MeWhenI 🇻🇦 884 42 399ms 13 Jul 2024 793rd kg583 🇺🇸 884 42 467ms 31 Jul 2024 797th villfa 884 50 4ms 27 May 2019 797th UpwardProcess 884 50 5ms 30 Jul 2019 797th ondras 884 50 5ms 3 May 2020 797th cywong-amino 🇭🇰 884 50 4ms 20 May 2020 First Prev 721–800 of 4,851 Next Last