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?
Day of Week in JavaScript 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 67th randomuser1312 🇨🇭 959 74 53ms 30 Oct 2025 67th KasperKivimaeki 🇫🇮 959 74 57ms 1 Nov 2025 67th Babafaba 959 74 52ms 4 Nov 2025 67th Moreallure 959 74 57ms 17 Feb 2026 67th raphaelimahorn 959 74 52ms 14 days ago 86th Ashikpaul 🇮🇳 947 75 52ms 13 Oct 2024 86th 823126 947 75 48ms 13 Nov 2024 86th n3uromanc3r 947 75 53ms 28 Nov 2024 86th Yax42 🇫🇷 947 75 65ms 5 Sep 2025 90th kkoenig 934 76 56ms 22 Dec 2023 91st NickTheEASDude 🇺🇸 922 77 53ms 26 Jan 2024 91st Protothor 922 77 53ms 3 Jul 2025 93rd cryosis7 910 78 50ms 23 Aug 2023 93rd jbt 910 78 48ms 26 Dec 2023 93rd rastapasta 910 78 51ms 7 Aug 2024 96th Cube14yt 899 79 54ms 19 Nov 2025 97th grospolina 888 80 61ms 2 Oct 2024 98th PowershellKnut 🇳🇴 877 81 66ms 7 Jan 2024 99th gnlow 🇰🇷 855 83 53ms 11 Feb 2025 99th LarsFredrikHolstTry 855 83 49ms 28 Oct 2025 101st Yewzir 🇧🇪 845 84 50ms 5 Nov 2023 101st XenThe 🇬🇧 845 84 60ms 23 Jun 2025 103rd kxwish 🇨🇦 826 86 57ms 12 Sep 2023 103rd Maximizer02 826 86 55ms 17 Sep 2025 103rd jateute 826 86 51ms 27 Oct 2025 106th Sinescape 816 87 74ms 16 Sep 2024 106th BREMAUCY 🇫🇷 816 87 52ms 13 Dec 2025 108th funnyboy-roks 807 88 55ms 15 Jun 2024 109th DanielVenable 789 90 58ms 7 Aug 2025 109th elisherer 🇮🇱 789 90 52ms 3 Nov 2025 111th xnacly 🇩🇪 780 91 57ms 4 Jul 2023 111th vphoebe 780 91 55ms 23 Aug 2024 111th denkyuu1 780 91 76ms 23 Feb 2026 114th Ralac07 🇦🇺 755 94 50ms 4 Jul 2024 115th nathanadams 🇳🇿 732 97 11ms 22 Apr 2023 116th tayloia 🇬🇧 724 98 11ms 1 Jun 2023 117th janbehrens 🇩🇪 717 99 11ms 20 Apr 2023 117th Re-Adventures 🇮🇳 717 99 11ms 21 Apr 2023 117th niklv 🇷🇺 717 99 12ms 22 Apr 2023 117th KrausRaus 🇺🇸 717 99 14ms 22 Apr 2023 117th AutoGPT-code-golfer 717 99 11ms 22 Apr 2023 117th Kesefon 717 99 10ms 24 Apr 2023 117th stefangabos 🇷🇴 717 99 11ms 25 Apr 2023 117th ShiraJoseph 🇺🇸 717 99 11ms 6 May 2023 117th sebipopa 🇷🇴 717 99 11ms 26 May 2023 117th madeforlosers 717 99 12ms 7 Nov 2023 117th uttumuttu 🇫🇮 717 99 11ms 22 Dec 2023 117th epic-programmer-guy 717 99 52ms 29 Dec 2023 117th lewdev 🇺🇸 717 99 12ms 3 Jul 2024 117th non-bin 717 99 11ms 25 Jun 2025 117th gigaprofisi 🇺🇸 717 99 11ms 5 Jul 2025 117th acollett89 717 99 12ms 17 Jul 2025 117th alexsave 717 99 14ms 6 Nov 2025 134th zakariamouhid 710 100 10ms 22 Apr 2023 134th Ephellon 710 100 11ms 16 Dec 2023 134th Ow0cast 710 100 14ms 25 Jun 2024 134th CristhoferT29 710 100 53ms 6 Jul 2024 134th Roachbones 710 100 13ms 17 Jan 2026 139th dteague3989 703 101 10ms 25 May 2023 139th trinityy-7 703 101 10ms 19 Oct 2023 139th iliazeus 703 101 12ms 25 Nov 2025 142nd Mabeloid 🇳🇴 696 102 17ms 13 Oct 2024 143rd dsntzn 🇸🇰 689 103 15ms 15 Sep 2024 143rd kovdmm 689 103 54ms 13 Oct 2024 145th PumpedSardines 683 104 11ms 18 Sep 2024 146th didion0 🇺🇸 676 105 11ms 17 Apr 2023 146th Isaac-NTT 676 105 11ms 28 Jul 2023 146th MyXoToD 🇩🇪 676 105 11ms 8 May 2025 149th efgen 645 110 11ms 4 Jan 2024 150th andrewl64 546 130 10ms 7 Jan 2024 151st AndrewHuffman 490 145 10ms 29 Apr 2024 152nd iSickos 444 160 10ms 1 Sep 2023 First Prev 81–152 of 152
