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 161st mcammara 579 247 10ms 26 Jul 2018 162nd LakeThomason 577 248 9ms 1 Jun 2021 162nd olivermrose 🇺🇸 577 248 11ms 17 Apr 2022 162nd coreynash 577 248 10ms 2 Dec 2022 162nd LordSir101 577 248 11ms 26 Jul 2025 166th lowlighter 572 250 10ms 30 Oct 2020 166th DenverCoder1 572 250 10ms 27 Dec 2020 166th taimanh229 572 250 9ms 31 Dec 2020 166th n0es 572 250 9ms 31 Jan 2022 166th martijnckx 572 250 10ms 25 Oct 2023 171st PowershellKnut 🇳🇴 570 251 10ms 7 Jan 2024 172nd Nucaranlaeg 567 252 11ms 8 May 2019 172nd dylanpyle 567 252 10ms 28 Apr 2020 172nd pineapplebox 567 252 10ms 13 Feb 2022 172nd Jannik-dev 567 252 11ms 17 Oct 2023 172nd eMGeeneer 567 252 10ms 31 Jul 2024 177th Sloff 565 253 9ms 16 May 2018 177th mrxz 🇳🇱 565 253 9ms 24 Jun 2019 177th winstonyli 565 253 12ms 10 Oct 2021 177th predyy 565 253 9ms 13 Jul 2022 177th glthomas 🇺🇸 565 253 10ms 2 Nov 2023 177th Flippele 565 253 11ms 29 Jun 2024 183rd jackkav 563 254 10ms 10 Feb 2019 183rd daisy-lau 563 254 10ms 19 May 2020 183rd strattonwhisler 563 254 10ms 27 Mar 2025 186th deniz-blue 561 255 10ms 19 Oct 2023 186th pedro-a-soares 561 255 10ms 5 Dec 2023 186th kordrun 561 255 11ms 3 Apr 2024 189th Plopsi 559 256 10ms 4 Jun 2021 189th blaztoma 🇱🇹 559 256 11ms 24 Aug 2025 191st i-machine 556 257 12ms 28 Aug 2020 191st Pixels4Breakfast 556 257 10ms 11 Feb 2022 191st mckymsh 556 257 10ms 4 Feb 2024 194th oitio 554 258 11ms 13 Feb 2020 194th Johannesd3 554 258 11ms 2 Aug 2020 194th Giga-Bowser 554 258 9ms 5 Jan 2022 197th sultan 552 259 10ms 4 May 2021 197th sebipopa 🇷🇴 552 259 10ms 7 Sep 2022 197th stefangimmillaro 552 259 9ms 19 Oct 2022 200th aralroca 550 260 10ms 15 Aug 2020 201st harrisonfang 548 261 10ms 2 Apr 2021 202nd shaunjc 544 263 11ms 10 Jun 2021 202nd 4very 544 263 12ms 7 Jun 2025 204th baldie 542 264 12ms 26 May 2018 204th boris-gutman 542 264 10ms 14 Oct 2023 204th Xzyaihni 542 264 10ms 19 Jan 2024 204th Michiocre 542 264 9ms 20 Feb 2024 204th junkondo-jp 542 264 10ms 6 May 2024 209th christopherwk210 540 265 10ms 15 Oct 2018 209th lewdev 🇺🇸 540 265 10ms 24 Jul 2021 209th florton 540 265 13ms 7 Jan 2022 209th dwayneparton 540 265 10ms 13 Dec 2022 213th BillyBobFry 538 266 11ms 22 Oct 2021 214th ian-odonnell 536 267 11ms 5 Mar 2018 214th atenfyr 536 267 10ms 21 Jun 2020 214th dzshn 536 267 9ms 15 Mar 2021 214th SiddharthShyniben 536 267 10ms 7 Feb 2022 214th Tejas-H5 536 267 10ms 10 Apr 2022 219th doaboa 534 268 11ms 7 May 2018 219th Designer023 534 268 9ms 8 Feb 2020 219th j7126 534 268 10ms 31 Aug 2023 222nd rodigu 530 270 10ms 15 Jun 2021 222nd wansacis 🇩🇪 530 270 11ms 12 Nov 2021 222nd acollett89 530 270 10ms 21 Jul 2025 225th TheRainTrain 528 271 9ms 29 Aug 2022 226th Nefsen402 526 272 9ms 24 Jan 2019 226th jacklecroy 526 272 10ms 13 Apr 2021 226th ollyspooner 526 272 10ms 23 Nov 2022 226th demonischuk 526 272 11ms 15 Sep 2023 230th MaartenStaa 524 273 10ms 4 Jan 2020 230th Natanaelel 🇸🇪 524 273 10ms 8 Jul 2021 230th GoogleFeud 524 273 10ms 14 Dec 2021 230th adamnielson42 🇺🇸 524 273 14ms 30 May 2023 230th itserasmus 524 273 10ms 25 Jan 2024 230th iczelia 🇩🇪 524 273 10ms 10 Oct 2025 236th rbertram90 🇬🇧 522 274 11ms 13 Apr 2020 236th amazingalek 🇳🇴 522 274 11ms 20 Dec 2025 236th Madhav9897 522 274 9ms 21 Feb 2026 239th daniel-cardone 520 275 11ms 6 Jul 2024 240th nhaynes84 518 276 9ms 14 Feb 2019 First Prev 161–240 of 489 Next Last
