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 641st prestosilver 🇺🇸 822 282 427ms 20 Jan 2026 642nd wilihybrid 🇫🇮 821 294 65ms 6 Jan 2022 643rd lukechampine 821 329 287ms 16 Apr 2020 644th TomHanra 820 242 10ms 9 Oct 2017 644th ohailstorm 820 242 12ms 18 Jul 2018 644th jburghes 820 242 10ms 13 Apr 2020 644th exortech 820 242 10ms 22 May 2021 644th KatieLG 🇬🇧 820 242 10ms 7 Apr 2022 644th yishayv 820 242 9ms 18 Jan 2023 644th a6166231 🇨🇳 820 242 10ms 20 May 2025 651st wjessop 819 237 37ms 16 Apr 2020 652nd ZakkkkAttackkkk 🇵🇭 819 250 16ms 30 Dec 2021 652nd SomeKitten 🇺🇸 819 250 10ms 5 Jul 2025 654th MeWhenI 🇻🇦 819 283 131ms 15 Nov 2022 655th emgordon154 819 323 2ms 10 Jun 2025 656th ScriptingPro 818 232 279ms 20 Nov 2020 657th neel11235813 818 319 26ms 6 Jan 2023 658th MeWhenI 🇻🇦 818 330 284ms 10 Feb 2023 658th KasperKivimaeki 🇫🇮 818 330 303ms 17 Nov 2025 660th MeWhenI 🇻🇦 817 271 458ms 5 Mar 2022 661st MeWhenI 🇻🇦 817 278 4ms 6 Aug 2023 662nd oliverwoodings 816 243 10ms 21 May 2018 662nd thisishowmymindworks 🇳🇴 816 243 10ms 5 Oct 2020 662nd jn-lp 🇺🇦 816 243 12ms 31 Oct 2020 662nd ershadi-sayuri 816 243 10ms 14 Oct 2021 666th Alex-x90 🇺🇸 816 259 2ms 26 Jul 2024 667th MeWhenI 🇻🇦 816 288 67ms 5 Apr 2025 668th andersk 🇺🇸 816 307 131ms 25 Oct 2022 669th KatieLG 🇬🇧 815 238 36ms 10 Apr 2022 669th tatzyr 🇯🇵 815 238 35ms 8 Jan 2025 671st emplv 🇱🇻 815 241 6ms 16 Jan 2024 672nd MeWhenI 🇻🇦 815 274 9ms 25 Aug 2024 673rd frosster 🇨🇦 814 285 2ms 15 Feb 2026 674th Yewzir 🇧🇪 814 434 1,977ms 14 Nov 2025 675th darrylyeo 813 244 10ms 18 Dec 2019 675th SpareManiKatti 813 244 9ms 11 Sep 2021 677th GrayJoKing 🇦🇺 813 321 28ms 9 Mar 2023 678th tobyLovick 812 252 10ms 7 Dec 2023 678th JunkIce 812 252 17ms 5 Mar 2025 678th GodlyProgrammer1 812 252 18ms 22 Nov 2025 681st yzhs 🇩🇪 812 253 8ms 29 Feb 2020 682nd Feniske 🇫🇷 811 234 312ms 9 Nov 2023 683rd Shanethegamer 🇺🇸 811 242 42ms 17 Feb 2025 684th AdrienHache 🇫🇷 811 255 448ms 6 Aug 2025 685th dijs 810 245 9ms 8 Dec 2019 685th jquade7 810 245 10ms 27 May 2023 685th BenScattergood 810 245 11ms 17 Sep 2023 685th CaedenHarper 🇨🇦 810 245 1,402ms 3 Oct 2025 689th Daniikk1012 809 240 33ms 3 Nov 2025 690th PowershellKnut 🇳🇴 809 243 4ms 7 Jan 2024 691st BlankSpruce 809 250 9ms 24 Aug 2024 692nd akhil99 809 253 10ms 14 May 2020 692nd BenBanerjeeRichards 809 253 10ms 6 Nov 2021 692nd guilhem-roy 🇫🇷 809 253 9ms 23 Feb 2022 692nd fgrosshans 🇫🇷 809 253 11ms 5 May 2023 692nd cefqrn 809 253 11ms 15 May 2023 697th b97tsk 809 334 303ms 20 Apr 2020 698th ktheory 808 240 40ms 14 Jan 2020 699th HolmDev 808 289 130ms 3 Sep 2025 700th jacky-tay 🇳🇿 808 293 88ms 18 May 2021 701st KatieLG 🇬🇧 807 249 568ms 15 Jan 2024 702nd jahakari 807 256 420ms 21 Nov 2021 703rd j7126 807 276 119ms 31 Aug 2023 704th paul3412 806 246 11ms 1 Dec 2019 704th targrik 806 246 11ms 16 Apr 2025 704th cloudyshoe 806 246 10ms 15 May 2025 707th SaagarGodithi 806 254 10ms 10 May 2020 707th kenny14231 806 254 12ms 17 Aug 2022 707th jhpaques 🇫🇷 806 254 11ms 30 Nov 2022 707th rollershutter 806 254 11ms 5 May 2024 707th solisolu 806 254 10ms 17 Oct 2025 712th glthomas 🇺🇸 806 300 449ms 25 Feb 2023 713th tflyons 806 335 295ms 17 Apr 2020 714th AlephSquirrel 804 201 40ms 27 Dec 2023 715th RainOrigami 🇩🇪 804 257 417ms 18 Dec 2021 716th dokutan 804 277 122ms 19 Sep 2024 717th jkelly467 804 308 2,813ms 20 Oct 2025 718th choroba 803 217 3ms 21 Oct 2017 718th janbehrens 🇩🇪 803 217 3ms 10 May 2023 720th mcreenan 803 227 138ms 30 Jun 2018 First Prev 641–720 of 3,937 Next Last
