The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
99 Bottles of Beer in all languages 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 400th jared-hughes 878 221 42ms 12 Sep 2022 400th OhmNomNom 878 221 35ms 20 Oct 2022 403rd voytxt 🇨🇿 878 226 10ms 14 May 2023 404th lenabradley 878 233 9ms 1 Dec 2019 404th tpaxman 🇨🇦 878 233 10ms 15 Dec 2020 404th Just4FunCoder 878 233 11ms 22 Jan 2024 404th FortuiteMan 🇫🇷 878 233 10ms 11 days ago 408th GrayJoKing 🇦🇺 878 264 1ms 19 Jan 2023 409th lynn 877 241 2ms 28 Sep 2021 410th MeWhenI 🇻🇦 877 451 19ms 19 Jul 2025 411th UnderKoen 🇳🇱 876 302 2ms 20 Jan 2025 412th sean-niemann 🇺🇸 875 229 2ms 21 Jul 2023 413th idoweinstein 875 234 10ms 7 Aug 2022 413th SirBogman 🇺🇸 875 234 17ms 5 Feb 2023 413th jhu04 875 234 10ms 18 Jan 2024 413th emgordon154 875 234 10ms 3 May 2025 417th GrayJoKing 🇦🇺 875 253 489ms 27 Sep 2023 418th caasinehc 874 227 10ms 16 Oct 2018 418th ShiraJoseph 🇺🇸 874 227 11ms 4 May 2022 418th Andrey-Plotnikov 874 227 10ms 1 Jan 2023 421st MeWhenI 🇻🇦 874 242 2ms 26 May 2023 422nd Shanethegamer 🇺🇸 874 260 4ms 17 Feb 2025 423rd ovs-code 🇩🇪 874 269 65ms 12 Sep 2024 424th plcc0 873 185 37ms 24 Feb 2025 425th MeWhenI 🇻🇦 873 225 6ms 3 Jul 2023 426th kumavale 873 287 226ms 21 Nov 2025 427th lifthrasiir 🇰🇷 872 193 2ms 27 Nov 2024 428th janbehrens 🇩🇪 872 240 251ms 17 Jun 2023 429th TetraPengwin 872 266 2ms 14 Mar 2025 430th romero126 871 218 307ms 25 Apr 2024 431st Attero 🇸🇪 871 235 10ms 28 Oct 2020 431st olavaga 871 235 10ms 15 Aug 2021 431st pxeger 🇬🇧 871 235 18ms 18 Mar 2022 434th sean-niemann 🇺🇸 871 260 40ms 21 Apr 2023 435th owenoclee 870 228 10ms 7 Oct 2017 435th saramaebee 870 228 11ms 15 Oct 2018 437th sean-niemann 🇺🇸 870 246 88ms 14 Feb 2024 438th MeWhenI 🇻🇦 870 304 15ms 16 May 2023 439th clockworknazo 868 186 62ms 18 Sep 2022 440th dcgjb 867 219 276ms 25 Jan 2024 441st raspofabs 867 236 10ms 15 Jul 2024 442nd namelessiw 867 279 470ms 6 Oct 2025 443rd janbehrens 🇩🇪 866 227 6ms 2 Jul 2023 444th mintypython 866 229 9ms 15 Oct 2018 444th didion0 🇺🇸 866 229 9ms 14 Jan 2021 444th ForkKILLET 🇨🇳 866 229 10ms 18 Feb 2021 444th fitzdotlol 🇺🇸 866 229 9ms 28 Mar 2022 444th DayDun 🇸🇪 866 229 10ms 20 Jan 2023 449th MeWhenI 🇻🇦 866 247 91ms 13 Dec 2022 450th evnu 866 270 86ms 26 Oct 2025 451st MeWhenI 🇻🇦 865 239 396ms 8 Dec 2022 451st namelessiw 865 239 399ms 25 Oct 2024 453rd Waffle3z 865 268 2ms 11 Jan 2021 454th stefangimmillaro 864 231 1,220ms 3 Nov 2022 455th FlorianCassayre 🇫🇷 864 237 10ms 28 Oct 2022 455th mikehanus 864 237 10ms 20 Nov 2023 455th Anonymousellama21 864 237 9ms 6 Mar 2024 455th Johnor12 864 237 10ms 4 Jun 2024 455th fourth-bit 864 237 10ms 27 Jul 2024 455th yanjs 864 237 17ms 3 Jul 2025 461st liemvo 🇻🇳 864 274 100ms 11 May 2021 462nd juliansiebert 🇩🇪 863 220 304ms 22 Dec 2023 463rd lynn 862 202 3ms 4 May 2021 463rd neel11235813 862 202 3ms 9 Mar 2023 465th fitzdotlol 🇺🇸 862 225 35ms 25 May 2021 465th beirigo 🇧🇷 862 225 36ms 16 Jul 2024 467th albanian-laundromat 862 230 9ms 21 Feb 2026 468th FlyingPenguin223 862 269 2ms 14 Mar 2025 469th DialFrost 🇸🇬 862 362 1,399ms 29 Jan 2025 470th postie77 861 240 431ms 21 Nov 2021 470th tdkkdt 🇷🇺 861 240 435ms 21 Nov 2021 472nd error256 861 273 797ms 18 May 2024 473rd MeWhenI 🇻🇦 861 284 1,284ms 8 Jun 2023 474th MeWhenI 🇻🇦 860 233 2ms 29 Apr 2023 475th Irratix 🇳🇱 860 238 11ms 28 Apr 2022 475th neel11235813 860 238 16ms 8 Jan 2023 475th RYNO8 860 238 11ms 22 Aug 2023 475th ndren 860 238 17ms 30 Jan 2024 475th FranklinJiaChen 860 238 17ms 14 Jun 2024 475th Baroniket 860 238 17ms 13 Aug 2025 First Prev 401–480 of 3,937 Next Last