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 476th Baroniket 860 238 17ms 13 Aug 2025 482nd inventshah 860 246 2ms 23 Jan 2023 483rd davepagurek 859 212 119ms 23 Dec 2017 484th SirBogman 🇺🇸 859 221 304ms 5 Oct 2020 485th vlad-ushakov 859 231 10ms 22 Mar 2023 486th MeWhenI 🇻🇦 858 264 39ms 20 Jun 2022 487th JDiLenarda 🇫🇷 858 285 1,291ms 23 Oct 2020 488th yzhs 🇩🇪 856 239 9ms 8 Feb 2020 488th jakobkordez 🇸🇮 856 239 10ms 30 Nov 2022 488th KatieLG 🇬🇧 856 239 10ms 9 Jan 2026 491st MeWhenI 🇻🇦 855 197 2ms 25 Jan 2022 491st SirBogman 🇺🇸 855 197 2ms 2 Nov 2023 493rd labster 855 213 125ms 4 Feb 2018 494th MeWhenI 🇻🇦 855 222 265ms 28 Jan 2023 495th alexkunin 855 232 11ms 4 Jul 2019 495th vroup 🇩🇰 855 232 10ms 23 Sep 2022 495th TheDarkThatBarks 855 232 9ms 30 Jan 2024 495th lukegustafson 🇺🇸 855 232 10ms 7 Oct 2024 499th Lydxn 🇨🇦 854 283 409ms 7 Jul 2021 499th primo-ppcg 🇹🇭 854 283 454ms 7 Jul 2021 499th rotary-o 🇯🇵 854 283 435ms 14 Aug 2022 502nd nullie 853 240 17ms 20 Jan 2021 502nd kyleclaassen 853 240 10ms 12 Mar 2022 504th Yewzir 🇧🇪 853 245 2ms 17 Oct 2023 505th jared-hughes 852 272 1ms 22 Jun 2022 506th GrayJoKing 🇦🇺 852 276 62ms 20 Sep 2023 507th lifthrasiir 🇰🇷 852 294 121ms 9 Nov 2024 508th sgtdck 851 233 13ms 6 Oct 2018 508th BBoehm 🇩🇪 851 233 10ms 23 Feb 2021 508th PumpedSardines 851 233 10ms 18 Sep 2024 508th XenThe 🇬🇧 851 233 10ms 31 Aug 2025 512th perlebach 🇨🇿 850 205 3ms 19 Aug 2021 513th GolfingSuccess 🇬🇷 850 263 9ms 8 Jan 2025 513th MeWhenI 🇻🇦 850 263 9ms 8 Jan 2025 515th stertooy 🇧🇪 849 241 10ms 13 Jun 2024 515th moustave 849 241 10ms 30 Oct 2024 515th DrakeSeteraO 849 241 11ms 12 Nov 2025 518th tomh1012 848 234 9ms 1 Oct 2020 518th KrausRaus 🇺🇸 848 234 10ms 12 Dec 2020 518th RedstoneTim 848 234 10ms 29 Jun 2021 518th veiko 848 234 10ms 18 Jun 2022 522nd prplz 🇦🇺 847 224 273ms 22 Apr 2021 523rd NewDefectus 🇮🇱 847 229 38ms 16 Feb 2021 524th Pimentero 🇷🇺 847 232 6ms 25 Dec 2023 525th sean-niemann 🇺🇸 847 319 288ms 20 Sep 2023 525th stefangimmillaro 847 319 311ms 13 Dec 2024 527th MeWhenI 🇻🇦 846 191 45ms 29 Jul 2022 528th benson-z 846 242 11ms 3 Dec 2024 529th urojony 🇵🇱 846 250 2ms 21 Nov 2024 530th GrayJoKing 🇦🇺 846 274 400ms 16 Jun 2022 531st dee-gomma 844 235 10ms 30 Mar 2019 531st GeorgeStechman 🇬🇧 844 235 10ms 19 Jun 2022 531st two-bad 🇬🇧 844 235 11ms 23 Jun 2022 531st jbt 844 235 9ms 26 Dec 2023 531st xyangst 844 235 10ms 15 Oct 2024 536th neel11235813 844 238 480ms 15 Jan 2024 537th revlayle 🇺🇸 844 245 417ms 14 Jan 2022 537th strout 844 245 414ms 19 Aug 2022 537th tomh1012 844 245 420ms 3 Dec 2025 537th Yax42 🇫🇷 844 245 384ms 23 Dec 2025 541st fuchen 844 290 1,284ms 10 May 2020 542nd saracen 844 320 279ms 17 Apr 2020 543rd marcin7Cd 843 277 139ms 14 Mar 2021 544th albanian-laundromat 842 238 1ms 19 Dec 2025 545th Crambor 842 243 10ms 9 Jan 2020 545th knutae 🇳🇴 842 243 10ms 29 Nov 2021 547th GrayJoKing 🇦🇺 842 260 2ms 13 Sep 2022 548th lynn 842 283 10ms 17 Nov 2021 549th SirBogman 🇺🇸 841 231 34ms 9 Aug 2023 550th fgrosshans 🇫🇷 841 271 8ms 6 May 2023 551st weliveinhell 🇭🇹 841 321 290ms 6 Oct 2023 552nd primo-ppcg 🇹🇭 841 824 5ms 8 Apr 2019 553rd PowershellKnut 🇳🇴 840 226 275ms 27 Jun 2022 554th Gaspar-Cdv 840 236 12ms 11 Jun 2021 554th niklv 🇷🇺 840 236 10ms 1 Jan 2024 556th daedals 839 244 11ms 25 Apr 2019 556th dzhang314 839 244 10ms 11 Aug 2019 556th pique0822 839 244 11ms 1 Jul 2021 556th TimHuisman1703 839 244 9ms 7 Jan 2022 556th ZoeyKD 839 244 17ms 13 May 2023 First Prev 481–560 of 3,937 Next Last
