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 317th CornerMercury 🇬🇧 902 227 9ms 22 Dec 2025 317th albanian-laundromat 902 227 10ms 11 Feb 2026 317th blaztoma 🇱🇹 902 227 10ms 22 days ago 317th ComradeSquirrel 902 227 17ms 118 mins ago 325th CatsAreFluffy 901 209 56ms 20 Dec 2022 326th efgen 901 220 9ms 8 Jun 2020 326th revlayle 🇺🇸 901 220 11ms 23 Mar 2021 326th jared-hughes 901 220 10ms 5 Apr 2022 326th CallanMcNulty 901 220 9ms 29 Sep 2022 326th DialFrost 🇸🇬 901 220 9ms 19 Jan 2025 326th JOrE20 901 220 10ms 27 Jan 2026 332nd albanian-laundromat 901 223 493ms 11 Feb 2026 333rd 2bular 900 187 7ms 17 Jun 2025 334th DialFrost 🇸🇬 899 269 381ms 18 Nov 2025 335th GolfingSuccess 🇬🇷 899 347 1,425ms 20 Jan 2025 335th albanian-laundromat 899 347 1,436ms 15 Oct 2025 337th stefangimmillaro 898 216 35ms 14 Feb 2022 338th bricknellj 898 228 16ms 28 Nov 2022 338th Emutis 🇱🇹 898 228 9ms 20 days ago 340th sisyphus-ppcg 🇦🇺 898 248 118ms 19 Feb 2023 341st jakobwitte 897 221 9ms 23 Mar 2018 341st EFHIII 897 221 10ms 7 Aug 2020 343rd inventshah 897 245 2ms 18 Nov 2022 344th Shanethegamer 🇺🇸 897 348 1,424ms 16 Feb 2025 345th GrayJoKing 🇦🇺 896 253 38ms 21 Jun 2022 346th anter69 🇭🇺 895 223 1,267ms 18 Sep 2024 346th pardouin 🇫🇷 895 223 1,279ms 26 Aug 2025 348th Natanaelel 🇸🇪 894 217 33ms 12 days ago 349th schlopp 894 229 17ms 8 Sep 2021 349th janbehrens 🇩🇪 894 229 17ms 17 Jun 2023 349th Camaendir 894 229 9ms 4 Apr 2025 352nd inventshah 894 270 428ms 23 Jan 2023 353rd p01 893 222 10ms 30 Oct 2017 353rd cywong-amino 🇭🇰 893 222 10ms 7 Oct 2020 353rd janbehrens 🇩🇪 893 222 11ms 17 Jun 2023 353rd Lv0Sys 🇵🇱 893 222 10ms 19 Feb 2026 357th AlephSquirrel 893 225 521ms 16 Jan 2024 358th Shanethegamer 🇺🇸 893 250 9ms 17 Feb 2025 359th MeWhenI 🇻🇦 892 350 1,397ms 9 Feb 2025 360th Jaykul 891 213 275ms 28 Apr 2024 361st inventshah 890 230 10ms 13 Sep 2022 361st plcc0 890 230 10ms 30 Mar 2025 361st Lv0Sys 🇵🇱 890 230 10ms 19 Feb 2026 364th omurakazuaki 🇯🇵 889 223 10ms 11 Feb 2021 364th olleicua 🇺🇸 889 223 12ms 15 Feb 2024 364th hacker112 🇸🇪 889 223 11ms 16 Jun 2024 364th Salutations45 889 223 9ms 10 Nov 2024 368th MeWhenI 🇻🇦 887 236 306ms 15 Feb 2023 369th jbbarth 🇫🇷 886 219 35ms 28 Sep 2021 370th lynn 886 231 10ms 4 Mar 2021 370th jascotm 886 231 10ms 1 Apr 2021 370th lucky-lilypad 886 231 10ms 4 Apr 2021 370th johnathanleung18 886 231 10ms 3 Oct 2021 370th TobyBoyne 🇬🇧 886 231 17ms 7 Dec 2023 375th PatrickStephansen 🇿🇦 885 224 10ms 5 Oct 2020 375th LucasMartinsUthi 885 224 11ms 2 Jul 2025 377th emgordon154 885 227 496ms 3 May 2025 378th NewDefectus 🇮🇱 884 197 3ms 28 May 2021 378th scpchicken 🇵🇼 884 197 3ms 4 Feb 2023 378th DialFrost 🇸🇬 884 197 4ms 22 Jan 2025 381st dloscutoff 883 237 532ms 27 Nov 2018 382nd SirBogman 🇺🇸 883 268 95ms 15 Feb 2020 383rd olleicua 🇺🇸 882 220 39ms 15 Feb 2024 384th shelerr 882 232 10ms 3 Jul 2022 384th AlephSquirrel 882 232 10ms 3 Jan 2023 384th janlelis 882 232 17ms 25 Aug 2025 387th Attero 🇸🇪 882 263 1ms 14 Mar 2020 388th typeswitch-dev 🇵🇹 882 295 3ms 21 Jul 2023 389th lynn 881 191 2ms 25 Jan 2022 390th Joshua0127 881 225 10ms 15 Sep 2019 390th rgthree 881 225 11ms 22 Aug 2023 392nd SirBogman 🇺🇸 881 228 508ms 20 Jan 2024 393rd Romain-1 🇫🇷 880 235 376ms 2 May 2022 394th rucin93 🇵🇱 879 224 149ms 28 Oct 2024 394th sean-niemann 🇺🇸 879 224 172ms 28 Oct 2024 396th GolfingSuccess 🇬🇷 879 230 5ms 16 Aug 2024 397th MeWhenI 🇻🇦 879 238 4ms 13 Oct 2023 398th MeWhenI 🇻🇦 879 251 151ms 1 May 2023 399th Lydxn 🇨🇦 879 310 25ms 9 Jul 2021 400th SirBogman 🇺🇸 878 221 33ms 29 Dec 2021 First Prev 321–400 of 3,937 Next Last