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?
Evil Numbers 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 880th anter69 🇭🇺 881 31 1,266ms 10 Mar 2025 882nd wuzekai518 880 60 129ms 18 Jun 2024 883rd Lydxn 🇨🇦 880 94 1,789ms 22 Apr 2024 883rd JayXon 🇺🇸 880 94 1,792ms 22 Apr 2024 885th Steffan153 🇫🇮 879 107 1,431ms 26 days ago 886th sisyphus-ppcg 🇦🇺 878 38 122ms 4 Nov 2021 886th MeWhenI 🇻🇦 878 38 119ms 3 Dec 2021 886th steffan-polygolf 878 38 122ms 24 Feb 2023 886th Shanethegamer 🇺🇸 878 38 122ms 22 Mar 2023 886th stefangimmillaro 878 38 123ms 4 Aug 2023 886th fuzzylojik-golf 🇺🇸 878 38 127ms 5 Sep 2025 892nd prplz 🇦🇺 878 73 86ms 1 Jan 2022 892nd Irratix 🇳🇱 878 73 73ms 3 Jan 2022 892nd inventshah 878 73 62ms 18 Jan 2022 892nd MeWhenI 🇻🇦 878 73 56ms 8 May 2022 892nd solmyr2000 878 73 70ms 20 Jun 2022 892nd m-tkach 🇺🇦 878 73 58ms 26 Jun 2022 892nd michael-pruglo 🇺🇦 878 73 64ms 13 Jul 2022 892nd Alex-x90 🇺🇸 878 73 59ms 30 Jul 2022 892nd jared-hughes 878 73 59ms 8 Sep 2022 892nd janbehrens 🇩🇪 878 73 54ms 20 Nov 2022 892nd Yewzir 🇧🇪 878 73 63ms 14 Oct 2023 892nd Betuaredead 878 73 57ms 12 Nov 2023 892nd Mandrzejy 🇵🇱 878 73 54ms 14 Apr 2024 892nd pardouin 🇫🇷 878 73 60ms 23 Aug 2024 892nd CaedenHarper 🇨🇦 878 73 62ms 13 days ago 907th Shanethegamer 🇺🇸 878 110 10ms 1 Aug 2023 907th MeWhenI 🇻🇦 878 110 10ms 1 Aug 2023 907th Lydxn 🇨🇦 878 110 9ms 1 Aug 2023 907th JayXon 🇺🇸 878 110 9ms 2 Aug 2023 907th Steffan153 🇫🇮 878 110 10ms 2 Aug 2023 907th janbehrens 🇩🇪 878 110 9ms 2 Aug 2023 907th GrayJoKing 🇦🇺 878 110 9ms 11 Aug 2023 907th BREMAUCY 🇫🇷 878 110 9ms 7 Sep 2023 907th dokutan 878 110 9ms 20 Oct 2023 907th Yewzir 🇧🇪 878 110 9ms 12 Mar 2024 907th rucin93 🇵🇱 878 110 9ms 10 May 2024 907th HumanoidCPU 878 110 10ms 14 May 2024 907th pardouin 🇫🇷 878 110 9ms 20 Aug 2024 907th KatieLG 🇬🇧 878 110 10ms 26 Sep 2024 907th emgordon154 878 110 9ms 4 Dec 2024 907th CaedenHarper 🇨🇦 878 110 9ms 24 Jan 2025 907th albanian-laundromat 878 110 10ms 20 Jul 2025 907th GolfingSuccess 🇬🇷 878 110 10ms 15 Aug 2025 907th snoozingnewt 🇨🇦 878 110 9ms 5 Dec 2025 907th JOrE20 878 110 10ms 26 Dec 2025 927th j55d 877 41 11ms 29 Sep 2018 927th KatieLG 🇬🇧 877 41 12ms 15 Apr 2021 927th igmcdowell 877 41 10ms 4 Jan 2022 927th MWI-polygolf 877 41 10ms 6 Dec 2023 927th Yax42 🇫🇷 877 41 9ms 5 Sep 2025 932nd sisyphus-ppcg 🇦🇺 875 83 290ms 14 Jun 2021 933rd AgathokakologicalBit 873 45 10ms 19 Jul 2019 933rd face0xff 873 45 16ms 26 Nov 2021 933rd RDShah 873 45 17ms 12 Jun 2022 933rd tri1212 🇻🇳 873 45 17ms 21 Jul 2022 933rd vhoulbreque 🇫🇷 873 45 16ms 13 Aug 2022 933rd Andriamanitra 🇫🇮 873 45 17ms 22 Sep 2022 933rd gXLg 🇩🇪 873 45 10ms 22 Oct 2022 933rd SniperSmiley 🇺🇸 873 45 11ms 13 Dec 2022 933rd b10011 🇫🇮 873 45 10ms 13 Jan 2023 933rd Ripick 873 45 16ms 1 Feb 2023 933rd SirFireball3521 873 45 10ms 4 Feb 2023 933rd quimey 873 45 16ms 22 Mar 2023 933rd rollershutter 873 45 16ms 25 Apr 2023 933rd celiendonze 🇨🇭 873 45 17ms 4 Jul 2023 933rd cros107 🇦🇺 873 45 17ms 14 Aug 2023 933rd yourlefthandman 873 45 16ms 15 Aug 2023 933rd PatrickStephansen 🇿🇦 873 45 10ms 23 Aug 2023 933rd ListeriaM 873 45 9ms 25 Aug 2023 933rd dteague3989 873 45 10ms 26 Oct 2023 933rd boboquack 873 45 17ms 18 Nov 2023 933rd Dataen 873 45 17ms 12 Jan 2024 933rd NickTheEASDude 🇺🇸 873 45 16ms 1 Feb 2024 933rd LlamaLad7 🇬🇧 873 45 10ms 9 Feb 2024 933rd retrohun 873 45 9ms 29 Mar 2024 933rd starfihs 873 45 9ms 2 Aug 2024 933rd jatloe 873 45 16ms 24 Aug 2024 933rd jamiloBBKing 873 45 18ms 27 Jan 2025 933rd jamesthekee 873 45 15ms 27 Jan 2025 First Prev 881–960 of 5,124 Next Last