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?
Foo Fizz Buzz Bar in Python 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 636th holmest14 675 123 11ms 6 Aug 2024 636th GeneralFabian 675 123 12ms 14 Dec 2024 643rd HassanAliKadhem 🇧🇭 669 124 12ms 5 Jan 2022 643rd docd 669 124 12ms 8 Aug 2022 643rd Very-Nerdy-Human 669 124 12ms 13 Jan 2024 643rd 40fied4t 669 124 12ms 6 May 2025 643rd DoubleUynn 669 124 12ms 21 Jun 2025 648th CheeseCake628 🇳🇴 664 125 12ms 21 Jan 2023 648th mrmena 🇦🇺 664 125 18ms 26 Mar 2024 650th kevdah 659 126 11ms 5 Oct 2022 650th QuincyNash 🇺🇸 659 126 12ms 30 Nov 2022 650th TheCod-r 🇦🇶 659 126 18ms 26 Feb 2023 650th camieac 🇬🇧 659 126 12ms 22 Jul 2023 650th Fanrco 659 126 12ms 31 Aug 2023 650th eddvrs 659 126 77ms 21 Dec 2023 650th truisseaux 659 126 12ms 5 Sep 2024 657th CuboidRaptor 🇨🇦 654 127 13ms 18 Jan 2022 657th MarioPlq 654 127 11ms 24 Jun 2022 657th jsthope 654 127 13ms 28 Sep 2022 657th brochmann 🇸🇪 654 127 19ms 18 Oct 2022 657th 4ndyJ 🇬🇧 654 127 12ms 7 Jan 2023 657th yuchuehw 654 127 17ms 24 Jan 2024 663rd fgrosshans 🇫🇷 648 128 12ms 10 Jan 2022 663rd winstonDeGreef 648 128 12ms 11 Jan 2022 663rd j-Ewan 648 128 11ms 1 Mar 2022 663rd karhuthebear 648 128 19ms 4 May 2022 663rd jroscoe5 648 128 12ms 10 Aug 2022 663rd wa1ker38552 648 128 12ms 24 May 2023 663rd DGipe 648 128 12ms 2 Jul 2024 663rd PaulB06 648 128 11ms 7 Nov 2024 671st glassala 643 129 11ms 25 Dec 2024 671st kadamkaustubh 643 129 12ms 25 Sep 2025 673rd JohannaWarnqvist 638 130 12ms 12 Feb 2022 673rd MathieuIko 638 130 65ms 21 Feb 2022 673rd JuanGomez12 638 130 12ms 12 Jan 2023 673rd Wildst 638 130 11ms 6 Jul 2023 673rd Jacob-Gendelman 638 130 11ms 26 Jul 2023 673rd diquah 638 130 11ms 13 Nov 2023 673rd Zach10za 638 130 11ms 19 Jan 2024 673rd ItsMeNoobieboy 638 130 11ms 12 Jun 2024 673rd ffelixm 638 130 12ms 25 May 2025 673rd TheZwierzLF 🇵🇱 638 130 12ms 29 May 2025 683rd goGuru 634 131 11ms 26 Dec 2022 683rd Gpopcorn 634 131 11ms 12 Jul 2023 683rd rexvelde 634 131 11ms 18 Aug 2024 683rd Unknownuserfrommars 634 131 11ms 20 Nov 2024 683rd benvreeves 634 131 11ms 29 Jul 2025 683rd cthierfelder 🇲🇨 634 131 12ms 4 Sep 2025 689th RandGuy 629 132 12ms 30 Jun 2022 689th MatthewBarroso 629 132 12ms 3 Jan 2024 689th vtilde 629 132 11ms 8 Jan 2024 689th JakeDaCake36 629 132 17ms 19 Feb 2024 689th martindotexe 🇳🇴 629 132 68ms 23 Feb 2025 694th Smetalo 624 133 10ms 25 Aug 2022 694th PotatoSaladOverlord 624 133 11ms 7 Apr 2023 694th jdsp522 624 133 11ms 15 Jul 2023 694th wiebecommajonas 624 133 17ms 2 May 2024 694th FVDurumMixto 624 133 12ms 3 Apr 2025 694th EnisEfe0 624 133 11ms 18 May 2025 694th clayboll99 624 133 11ms 14 Jul 2025 694th Maashau 624 133 21ms 9 Dec 2025 702nd hymanimy 619 134 11ms 4 Dec 2021 702nd virtualnerd2 619 134 11ms 5 Dec 2021 702nd OppositeShark 619 134 55ms 7 Apr 2022 702nd GulgDev 619 134 13ms 21 Mar 2023 702nd ztuned 619 134 10ms 2 Oct 2023 702nd Amheus 619 134 11ms 7 Oct 2023 702nd nooby31415 619 134 12ms 15 Jul 2025 709th jlundstedt 615 135 11ms 27 Dec 2021 709th vinkami 615 135 12ms 25 May 2023 709th JesseNoEyes 🇺🇸 615 135 11ms 20 Sep 2024 712th felixcroc 610 136 12ms 15 Apr 2022 712th jhpaques 🇫🇷 610 136 18ms 2 Aug 2022 712th Naruto-333 610 136 11ms 17 Feb 2024 715th ConnorSMorrison 606 137 12ms 28 Apr 2022 715th unexpectedferret 606 137 18ms 12 May 2022 715th jessegyger 606 137 11ms 8 Nov 2022 715th crhenley 🇺🇸 606 137 13ms 30 Oct 2023 715th Barry-Other-Barry 606 137 12ms 29 Jul 2025 720th Matthewhine8 601 138 11ms 26 Aug 2025 First Prev 641–720 of 879 Next Last
