The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
99 Bottles of Beer in JavaScript in chars. 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 Chars Time Submitted 240th dsntzn 🇸🇰 518 276 10ms 9 Aug 2020 240th unfinishedprogram 518 276 13ms 28 Jun 2023 240th Cavan-P 518 276 9ms 10 Nov 2024 244th john-nordqvist 516 277 10ms 8 Oct 2021 244th eTrey13 516 277 10ms 3 Feb 2025 246th hyvyys 514 278 10ms 25 Aug 2020 246th vincens2005 🇺🇸 514 278 12ms 25 Mar 2022 246th JustinTaylorWeiss 514 278 10ms 5 Nov 2022 246th Leftykap 514 278 10ms 27 Nov 2022 250th pepulio 513 279 9ms 17 Oct 2017 250th meenie 513 279 9ms 31 Dec 2020 250th omgmog 513 279 10ms 8 Aug 2022 250th magarifullin 513 279 10ms 4 Oct 2024 254th i-a-n 511 280 10ms 8 May 2018 254th Ranner198 511 280 12ms 14 Nov 2019 254th antonioawm 511 280 10ms 9 Apr 2020 254th E2dgar 511 280 9ms 31 Jan 2022 254th CaedenHarper 🇨🇦 511 280 9ms 31 Aug 2025 254th denis-jasselette 511 280 9ms 17 Oct 2025 260th Kibble 509 281 10ms 10 Jul 2020 260th joshop 509 281 10ms 19 Dec 2021 260th henrygagnier 509 281 12ms 20 Nov 2024 263rd sbagasan 507 282 10ms 28 Apr 2020 263rd mackereldev 507 282 11ms 27 Apr 2022 263rd FrederikHutfless 🇩🇪 507 282 10ms 23 Dec 2022 263rd gazhay 507 282 9ms 2 Jan 2025 267th akinonyx 505 283 10ms 24 Mar 2021 268th pg98 504 284 9ms 14 Mar 2018 268th jdweeks 504 284 11ms 26 May 2020 268th jcheritat 504 284 10ms 7 Sep 2020 271st colraw 🇸🇪 502 285 11ms 21 Jan 2023 272nd joakim-ronning 500 286 10ms 23 May 2023 273rd Ivraj 498 287 10ms 9 Aug 2021 273rd TheLazySquid 498 287 9ms 20 Dec 2022 275th haru-24 495 289 11ms 14 Jul 2022 275th stephanie-flower 495 289 10ms 17 Oct 2025 277th pablaber 493 290 10ms 2 Oct 2017 277th eikhr 🇳🇴 493 290 9ms 14 Jun 2021 279th Andrii-A 491 291 10ms 10 Apr 2020 280th bobsbeenjamin 🇺🇸 490 292 10ms 17 Dec 2020 281st coramba 488 293 10ms 7 Apr 2019 281st squadb3 488 293 9ms 31 Aug 2019 281st ahorihan 488 293 10ms 3 Aug 2022 281st krestaino 488 293 9ms 4 Aug 2022 281st cmoedk 488 293 12ms 31 Oct 2022 281st Isaac-NTT 488 293 10ms 16 Jun 2023 287th GiftOfDeath 486 294 9ms 5 Feb 2018 287th mukulkesh 486 294 9ms 9 Dec 2020 287th sech1p 🇵🇱 486 294 12ms 6 Oct 2022 290th synchromic 485 295 10ms 8 May 2020 290th Ashikpaul 🇮🇳 485 295 12ms 9 May 2021 290th pbarath 485 295 9ms 14 Jun 2021 290th gavinmorrow 485 295 9ms 19 Sep 2022 290th LarsFredrikHolstTry 485 295 10ms 30 Oct 2025 295th ethan7g 483 296 11ms 16 Apr 2020 295th boxjelly 483 296 11ms 23 Feb 2021 295th vang1ong7ang 483 296 10ms 29 Oct 2021 295th phpboyscout 483 296 9ms 15 Feb 2023 299th quirked-up 481 297 12ms 2 Sep 2023 299th Kesefon 481 297 10ms 16 Oct 2023 301st ciaranmag 480 298 11ms 25 Jan 2019 301st MrILL 480 298 9ms 31 Oct 2020 301st tommy-dronkers 480 298 10ms 9 Dec 2020 301st NathanGabrielson 480 298 10ms 25 Mar 2022 301st otubby 480 298 12ms 25 Mar 2022 306th IchBinMichMarkus 478 299 11ms 5 Jul 2023 306th AnnoyedArt1256 478 299 13ms 8 Sep 2023 306th GeorgeSG 478 299 9ms 5 Dec 2023 306th SOONwasTaken 478 299 9ms 18 Oct 2025 310th JackWorman 477 300 9ms 11 Aug 2019 310th SpiritAxolotl 🇺🇸 477 300 10ms 22 Mar 2024 310th kydogia 477 300 10ms 28 Mar 2024 313th Great-Gamer 475 301 10ms 23 Feb 2022 314th JulianJJ 474 302 10ms 9 Dec 2020 314th K4rakara 474 302 10ms 12 Dec 2020 316th kwoisphiosm 472 303 10ms 14 May 2021 316th A11yship 472 303 10ms 2 Nov 2023 316th iliazeus 472 303 11ms 15 Feb 2024 316th jateute 472 303 10ms 10 Sep 2025 320th ianpoe 470 304 11ms 14 Mar 2020 First Prev 241–320 of 489 Next Last
