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 801st dokutan 788 280 148ms 18 Sep 2024 802nd janbehrens 🇩🇪 788 281 472ms 24 Mar 2022 803rd dpethes 788 346 26ms 10 Jan 2024 804th Nucaranlaeg 787 252 11ms 8 May 2019 804th dylanpyle 787 252 10ms 28 Apr 2020 804th pineapplebox 787 252 10ms 13 Feb 2022 804th Jannik-dev 787 252 11ms 17 Oct 2023 804th byronknoll 🇺🇸 787 252 10ms 6 May 2024 804th eMGeeneer 787 252 10ms 31 Jul 2024 810th abailey2020 🇺🇸 787 260 10ms 13 Dec 2020 810th InigoK 🇺🇸 787 260 10ms 26 Sep 2025 810th Matter1024 🇮🇳 787 260 10ms 14 Feb 2026 813th adamnielson42 🇺🇸 787 290 9ms 8 Dec 2023 814th graft 786 247 33ms 11 Mar 2018 815th bakkeby 785 295 3ms 24 Sep 2022 816th albanian-laundromat 785 308 463ms 25 Oct 2025 817th SirBogman 🇺🇸 785 319 155ms 15 Feb 2020 818th Sloff 784 253 9ms 16 May 2018 818th mrxz 🇳🇱 784 253 9ms 24 Jun 2019 818th winstonyli 784 253 12ms 10 Oct 2021 818th predyy 784 253 9ms 13 Jul 2022 818th glthomas 🇺🇸 784 253 10ms 2 Nov 2023 818th Flippele 784 253 11ms 29 Jun 2024 824th thisishowmymindworks 🇳🇴 784 261 17ms 5 Oct 2020 824th Bonjour27891 🇻🇳 784 261 17ms 13 Mar 2022 824th MaxElf999 784 261 11ms 28 Sep 2022 824th TaserTheFox 🇺🇸 784 261 17ms 27 Apr 2023 824th Deppyforce 784 261 16ms 12 days ago 829th Yewzir 🇧🇪 784 285 8ms 20 Dec 2023 830th piebot3000 784 298 137ms 13 Sep 2023 831st brunoabpinto 783 251 5ms 30 Jan 2026 832nd DialFrost 🇸🇬 783 267 2ms 8 Nov 2023 832nd albanian-laundromat 783 267 2ms 9 Nov 2025 834th Ripick 783 296 126ms 15 Jul 2024 835th atsushiootani 782 248 36ms 27 Aug 2018 836th ian-h-chamberlain 🇺🇸 782 251 40ms 2 Nov 2025 837th albanian-laundromat 782 353 115ms 27 Nov 2025 838th jackkav 781 254 10ms 10 Feb 2019 838th daisy-lau 781 254 10ms 19 May 2020 838th strattonwhisler 781 254 10ms 27 Mar 2025 841st tnecio 781 262 10ms 29 Aug 2020 841st Indivicivet 781 262 10ms 26 Oct 2021 841st gchenfc 781 262 10ms 21 Jan 2022 841st LogicalJoe 781 262 9ms 26 Sep 2022 841st NDR0216 🇹🇼 781 262 10ms 12 Feb 2023 841st DrPrettyman 781 262 11ms 22 Dec 2025 847th perfunction 781 303 91ms 19 Jan 2020 848th jared-hughes 781 309 78ms 20 Jul 2022 849th ScottHamper 780 310 541ms 30 Nov 2025 850th Aurel300 🇨🇭 780 321 129ms 7 Jun 2024 851st janbehrens 🇩🇪 780 507 15ms 2 Aug 2023 852nd ethzhou 780 547 16ms 12 Nov 2022 853rd katehuds 779 304 92ms 20 Oct 2020 854th SirBogman 🇺🇸 779 353 39ms 3 Jun 2025 855th MaxCastella 🇫🇷 778 244 250ms 20 Oct 2023 856th deniz-blue 778 255 10ms 19 Oct 2023 856th pedro-a-soares 778 255 10ms 5 Dec 2023 856th kordrun 778 255 11ms 3 Apr 2024 856th de1ane1ra 778 255 9ms 22 Jun 2024 860th rplnt 778 263 10ms 20 Apr 2020 860th Koshu 778 263 10ms 2 Dec 2023 860th Troon 778 263 10ms 14 Mar 2025 863rd coffeenotfound 778 322 141ms 18 Aug 2021 863rd MeWhenI 🇻🇦 778 322 162ms 13 Nov 2022 865th rzv-me 777 253 5ms 5 Oct 2024 866th iznax 777 266 391ms 21 Nov 2021 867th jared-hughes 777 272 2ms 18 Sep 2025 868th lboust 777 319 2,593ms 3 Dec 2025 869th T193R-W00D5 776 208 39ms 23 Mar 2025 870th janbehrens 🇩🇪 776 305 87ms 16 Nov 2021 871st neil-ennis 🇦🇺 776 341 2ms 30 Dec 2020 872nd 0xjac 🇨🇭 776 348 308ms 7 Jun 2025 873rd MeWhenI 🇻🇦 775 254 160ms 5 Jan 2025 874th Plopsi 775 256 10ms 4 Jun 2021 874th richard-oelze 🇩🇪 775 256 10ms 14 Oct 2023 874th blaztoma 🇱🇹 775 256 11ms 24 Aug 2025 877th lrustand 775 264 10ms 5 Feb 2018 877th stefangimmillaro 775 264 10ms 20 Dec 2022 877th NOS4A5I 775 264 10ms 28 Dec 2022 877th rehoboth23 775 264 10ms 21 Dec 2023 First Prev 801–880 of 3,936 Next Last