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?
99 Bottles of Beer in Python 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 479th MurrayHS 388 304 17ms 28 Sep 2020 479th hidude562 388 304 10ms 19 Oct 2022 479th Stanworld80 388 304 13ms 6 Dec 2023 479th davidheineman 388 304 17ms 1 Jul 2024 479th themoonisacheese 388 304 19ms 3 Mar 2025 486th GG2024 387 305 11ms 6 Aug 2019 486th Pie42 387 305 17ms 7 Apr 2020 486th ihalseide 🇺🇸 387 305 17ms 5 Jun 2021 486th phpboyscout 387 305 16ms 10 Feb 2023 486th tknight00 387 305 17ms 9 Jan 2024 486th imelxr 🇮🇱 387 305 10ms 16 Aug 2024 486th hippopotam00sehead 🇨🇦 387 305 11ms 9 Sep 2024 486th AodhanDalton 387 305 16ms 27 Nov 2024 494th 130N35 386 306 17ms 28 Jan 2020 494th vonKrafft 386 306 10ms 24 Mar 2020 494th anclrii 386 306 10ms 14 Feb 2023 494th tvcv901 386 306 10ms 22 Mar 2023 494th yokasuretsu 386 306 10ms 10 Jan 2025 499th mrmavana 384 307 10ms 16 Dec 2019 499th haydenridd 384 307 10ms 20 Oct 2020 499th markbyrne 384 307 10ms 20 Oct 2020 499th htquach 384 307 11ms 26 Jun 2022 499th ShiniGangrade 384 307 13ms 14 Jul 2022 499th jorisbertram 384 307 19ms 26 Aug 2022 499th TrentGlimp 384 307 9ms 3 Sep 2022 499th TheBlupper 384 307 10ms 8 Nov 2022 499th kistlerf 🇨🇭 384 307 11ms 19 May 2025 508th michelebastione 🇮🇹 383 308 10ms 25 Sep 2019 508th 8davidb8 383 308 11ms 11 Jun 2020 508th jiaminglimjm 🇲🇾 383 308 11ms 5 Jul 2020 508th VilBoub 383 308 11ms 17 Apr 2022 508th badboj40 383 308 10ms 18 Jan 2023 508th markus-rekdal 383 308 18ms 2 Sep 2023 508th azure-blondon 383 308 9ms 10 Dec 2023 508th Trusly 383 308 10ms 24 Feb 2024 508th Europe2048 383 308 9ms 28 Nov 2024 508th nulzo 383 308 10ms 17 Oct 2025 518th evanrittner 382 309 11ms 26 Feb 2021 518th wrose100 382 309 10ms 17 Apr 2022 518th johndixon01 382 309 11ms 20 Sep 2022 518th sbyrne51 382 309 10ms 1 Oct 2022 518th SirFireball3521 382 309 10ms 4 Feb 2023 518th cloudberry-DeaDev 382 309 18ms 23 Dec 2023 518th drochom 382 309 10ms 19 Jun 2024 525th biotinker 381 310 9ms 22 Feb 2018 525th katehuds 381 310 9ms 22 Oct 2020 525th lucasvanmol 381 310 10ms 3 Mar 2021 525th raketexyz 381 310 17ms 29 Dec 2021 525th benjibon 381 310 34ms 14 Nov 2024 525th zobertke 381 310 10ms 22 May 2025 531st evanram 379 311 17ms 4 Feb 2020 531st jess2187 379 311 11ms 4 Feb 2020 531st DarkTemplar5 379 311 10ms 20 Feb 2020 531st pvilimas 379 311 9ms 16 Feb 2021 531st LocNgu 379 311 10ms 16 Jul 2023 531st kejcao 🇨🇦 379 311 17ms 10 May 2024 537th suchwise 378 312 10ms 29 Oct 2019 537th LlamaLad7 🇬🇧 378 312 10ms 15 Mar 2020 537th loserface69 378 312 10ms 15 Mar 2020 537th Giridesh 378 312 17ms 8 Apr 2022 537th Bulmenisaurus 378 312 10ms 21 Feb 2023 537th zpiatt 378 312 9ms 31 Aug 2023 537th kurkale6ka 378 312 11ms 27 Nov 2023 537th chartung17 378 312 10ms 14 Jan 2024 545th JBcoding 377 313 19ms 7 Sep 2020 545th Thinthiner 377 313 16ms 7 Sep 2020 545th bminahan73 377 313 9ms 27 Jun 2022 545th S-Ruban 377 313 11ms 27 Feb 2023 545th Dejgz 377 313 10ms 11 Sep 2023 545th dev-Thae 377 313 16ms 6 Nov 2023 545th martion2007 377 313 10ms 5 Aug 2024 552nd DarkBlueWall 376 314 13ms 29 Apr 2020 552nd Sir-Fancy 376 314 10ms 8 Oct 2020 552nd karhuthebear 376 314 10ms 11 May 2022 552nd RZ781 376 314 10ms 19 Nov 2023 552nd JamesTadleyGreen 376 314 11ms 20 Jun 2024 552nd SodiumFluoride 376 314 10ms 14 Sep 2024 552nd goodrichster 376 314 9ms 18 Dec 2024 552nd WillowWispy 376 314 10ms 13 Apr 2025 552nd ffelixm 376 314 10ms 22 May 2025 First Prev 481–560 of 1,103 Next Last