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?
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 401st SirBogman 🇺🇸 878 221 33ms 29 Dec 2021 401st jared-hughes 878 221 42ms 12 Sep 2022 401st OhmNomNom 878 221 35ms 20 Oct 2022 404th voytxt 🇨🇿 878 226 10ms 14 May 2023 405th lenabradley 878 233 9ms 1 Dec 2019 405th tpaxman 🇨🇦 878 233 10ms 15 Dec 2020 405th Just4FunCoder 878 233 11ms 22 Jan 2024 405th FortuiteMan 🇫🇷 878 233 10ms 13 days ago 409th GrayJoKing 🇦🇺 878 264 1ms 19 Jan 2023 410th lynn 877 241 2ms 28 Sep 2021 411th MeWhenI 🇻🇦 877 451 19ms 19 Jul 2025 412th UnderKoen 🇳🇱 876 302 2ms 20 Jan 2025 413th sean-niemann 🇺🇸 875 229 2ms 21 Jul 2023 414th idoweinstein 875 234 10ms 7 Aug 2022 414th SirBogman 🇺🇸 875 234 17ms 5 Feb 2023 414th jhu04 875 234 10ms 18 Jan 2024 414th emgordon154 875 234 10ms 3 May 2025 418th GrayJoKing 🇦🇺 875 253 489ms 27 Sep 2023 419th caasinehc 874 227 10ms 16 Oct 2018 419th ShiraJoseph 🇺🇸 874 227 11ms 4 May 2022 419th Andrey-Plotnikov 874 227 10ms 1 Jan 2023 422nd MeWhenI 🇻🇦 874 242 2ms 26 May 2023 423rd Shanethegamer 🇺🇸 874 260 4ms 17 Feb 2025 424th ovs-code 🇩🇪 874 269 65ms 12 Sep 2024 425th plcc0 873 185 37ms 24 Feb 2025 426th MeWhenI 🇻🇦 873 225 6ms 3 Jul 2023 427th kumavale 873 287 240ms 21 Nov 2025 428th lifthrasiir 🇰🇷 872 193 2ms 27 Nov 2024 429th janbehrens 🇩🇪 872 240 251ms 17 Jun 2023 430th TetraPengwin 872 266 2ms 14 Mar 2025 431st romero126 871 218 307ms 25 Apr 2024 432nd Attero 🇸🇪 871 235 10ms 28 Oct 2020 432nd olavaga 871 235 10ms 15 Aug 2021 432nd pxeger 🇬🇧 871 235 18ms 18 Mar 2022 435th sean-niemann 🇺🇸 871 260 40ms 21 Apr 2023 436th owenoclee 870 228 10ms 7 Oct 2017 436th saramaebee 870 228 11ms 15 Oct 2018 438th sean-niemann 🇺🇸 870 246 88ms 14 Feb 2024 439th MeWhenI 🇻🇦 870 304 15ms 16 May 2023 440th clockworknazo 868 186 62ms 18 Sep 2022 441st dcgjb 867 219 276ms 25 Jan 2024 442nd raspofabs 867 236 10ms 15 Jul 2024 443rd namelessiw 867 279 470ms 6 Oct 2025 444th janbehrens 🇩🇪 866 227 6ms 2 Jul 2023 445th mintypython 866 229 9ms 15 Oct 2018 445th didion0 🇺🇸 866 229 9ms 14 Jan 2021 445th ForkKILLET 🇨🇳 866 229 10ms 18 Feb 2021 445th fitzdotlol 🇺🇸 866 229 9ms 28 Mar 2022 445th DayDun 🇸🇪 866 229 10ms 20 Jan 2023 445th ComradeSquirrel 866 229 10ms 2 days ago 451st MeWhenI 🇻🇦 866 247 91ms 13 Dec 2022 452nd evnu 866 270 86ms 26 Oct 2025 453rd MeWhenI 🇻🇦 865 239 396ms 8 Dec 2022 453rd namelessiw 865 239 399ms 25 Oct 2024 455th Waffle3z 865 268 2ms 11 Jan 2021 456th stefangimmillaro 864 231 1,220ms 3 Nov 2022 457th FlorianCassayre 🇫🇷 864 237 10ms 28 Oct 2022 457th mikehanus 864 237 10ms 20 Nov 2023 457th Anonymousellama21 864 237 9ms 6 Mar 2024 457th Johnor12 864 237 10ms 4 Jun 2024 457th fourth-bit 864 237 10ms 27 Jul 2024 457th yanjs 864 237 17ms 3 Jul 2025 463rd liemvo 🇻🇳 864 274 110ms 11 May 2021 464th juliansiebert 🇩🇪 863 220 304ms 22 Dec 2023 465th lynn 862 202 3ms 4 May 2021 465th neel11235813 862 202 3ms 9 Mar 2023 467th fitzdotlol 🇺🇸 862 225 35ms 25 May 2021 467th beirigo 🇧🇷 862 225 36ms 16 Jul 2024 469th albanian-laundromat 862 230 9ms 21 Feb 2026 470th FlyingPenguin223 862 269 2ms 14 Mar 2025 471st DialFrost 🇸🇬 862 362 1,529ms 29 Jan 2025 472nd postie77 861 240 431ms 21 Nov 2021 472nd tdkkdt 🇷🇺 861 240 435ms 21 Nov 2021 474th error256 861 273 797ms 18 May 2024 475th MeWhenI 🇻🇦 861 284 1,284ms 8 Jun 2023 476th MeWhenI 🇻🇦 860 233 2ms 29 Apr 2023 477th Irratix 🇳🇱 860 238 11ms 28 Apr 2022 477th neel11235813 860 238 16ms 8 Jan 2023 477th RYNO8 860 238 11ms 22 Aug 2023 477th ndren 860 238 17ms 30 Jan 2024 First Prev 401–480 of 3,938 Next Last