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 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 302nd GolfingSuccess 🇬🇷 919 81 472ms 30 Dec 2024 302nd fuzzylojik-golf 🇺🇸 919 81 497ms 17 Jun 2025 302nd duckyluuk 🇳🇱 919 81 422ms 9 Jul 2025 302nd CornerMercury 🇬🇧 919 81 426ms 21 Jan 2026 325th FlorianCassayre 🇫🇷 918 89 14ms 24 Sep 2023 326th Alex-x90 🇺🇸 917 93 2ms 16 Apr 2023 326th nwellnhof 🇩🇪 917 93 2ms 17 Apr 2023 326th inventshah 917 93 2ms 13 May 2023 326th Lydxn 🇨🇦 917 93 2ms 13 May 2023 326th JayXon 🇺🇸 917 93 2ms 14 May 2023 326th ovs-code 🇩🇪 917 93 2ms 24 Aug 2023 326th rhdqor213 917 93 2ms 18 Sep 2023 326th JohandeRuiter 🇳🇱 917 93 2ms 28 Nov 2023 326th KasperKivimaeki 🇫🇮 917 93 3ms 21 Dec 2023 326th Steffan153 🇫🇮 917 93 2ms 10 Aug 2024 326th xsot 🇸🇬 917 93 2ms 10 Aug 2024 326th sean-niemann 🇺🇸 917 93 2ms 10 Aug 2024 338th canissimia 🇦🇶 916 44 2ms 7 Jan 2026 339th itsh01 911 74 49ms 8 Aug 2023 339th apokryfos 911 74 52ms 21 Aug 2023 339th predyy 911 74 53ms 25 Aug 2023 339th rgthree 911 74 59ms 6 Sep 2023 339th Florian-Mt 911 74 51ms 24 Sep 2023 339th iCyuba 911 74 48ms 25 Oct 2023 339th erikgaal 911 74 47ms 5 Jan 2024 339th thisishowmymindworks 🇳🇴 911 74 54ms 14 Jun 2024 339th dokutan 911 74 52ms 4 Aug 2024 339th Salutations45 911 74 54ms 13 Nov 2024 339th dylanarmstrong 911 74 52ms 19 Dec 2024 339th emgordon154 911 74 51ms 8 May 2025 339th cloudyshoe 911 74 52ms 18 May 2025 339th avavuvu 911 74 54ms 19 Jun 2025 339th randomuser1312 🇨🇭 911 74 53ms 30 Oct 2025 339th KasperKivimaeki 🇫🇮 911 74 57ms 1 Nov 2025 339th Babafaba 911 74 52ms 4 Nov 2025 339th Moreallure 911 74 57ms 17 Feb 2026 339th raphaelimahorn 911 74 52ms 14 days ago 358th rucin93 🇵🇱 908 82 382ms 16 Jan 2024 358th Yewzir 🇧🇪 908 82 441ms 4 Feb 2024 358th lifthrasiir 🇰🇷 908 82 402ms 2 Dec 2024 358th Babafaba 908 82 470ms 26 Nov 2025 358th snoozingnewt 🇨🇦 908 82 385ms 3 Dec 2025 363rd btjones0 908 90 15ms 2 May 2023 364th GrayJoKing 🇦🇺 907 53 70ms 18 Sep 2023 364th chunes3 🇺🇸 907 53 64ms 18 Sep 2023 364th ovs-code 🇩🇪 907 53 69ms 18 Sep 2023 364th primo-ppcg 🇹🇭 907 53 74ms 18 Sep 2023 364th Steffan153 🇫🇮 907 53 69ms 19 Sep 2023 364th Kacarott 🇦🇺 907 53 63ms 26 Sep 2023 364th Yewzir 🇧🇪 907 53 69ms 19 Nov 2023 364th error256 907 53 68ms 20 May 2024 364th edsrzf 🇳🇿 907 53 66ms 25 Sep 2024 364th pardouin 🇫🇷 907 53 69ms 25 Sep 2024 364th Shanethegamer 🇺🇸 907 53 75ms 19 Dec 2024 364th GolfingSuccess 🇬🇷 907 53 73ms 30 Dec 2024 364th sean-niemann 🇺🇸 907 53 66ms 7 Apr 2025 364th DialFrost 🇸🇬 907 53 62ms 10 Apr 2025 364th JayXon 🇺🇸 907 53 65ms 15 Nov 2025 364th snoozingnewt 🇨🇦 907 53 68ms 4 Feb 2026 364th fuzzylojik-golf 🇺🇸 907 53 63ms 9 days ago 381st Adix-null 🇱🇹 905 65 406ms 16 May 2023 381st MeWhenI 🇻🇦 905 65 414ms 26 Jul 2023 381st kkoenig 905 65 389ms 28 Dec 2023 381st Shanethegamer 🇺🇸 905 65 399ms 26 Mar 2024 381st xyangst 905 65 413ms 3 Oct 2024 381st dokutan 905 65 419ms 14 Oct 2024 381st petr-svestka 905 65 452ms 4 Nov 2024 381st voytxt 🇨🇿 905 65 454ms 4 Nov 2024 381st plcc0 905 65 422ms 4 Mar 2025 381st arcpolaris 905 65 428ms 23 Mar 2025 381st snoozingnewt 🇨🇦 905 65 428ms 12 Nov 2025 381st DialFrost 🇸🇬 905 65 428ms 14 Dec 2025 393rd Lydxn 🇨🇦 904 49 1,416ms 6 May 2023 393rd stefangimmillaro 904 49 1,504ms 6 Aug 2023 393rd pardouin 🇫🇷 904 49 1,431ms 10 Apr 2025 396th nwellnhof 🇩🇪 904 118 310ms 24 Aug 2023 396th JayXon 🇺🇸 904 118 290ms 24 Aug 2023 396th emplv 🇱🇻 904 118 288ms 25 Aug 2023 396th Steffan153 🇫🇮 904 118 291ms 25 Aug 2023 396th Lydxn 🇨🇦 904 118 279ms 28 Aug 2023 First Prev 321–400 of 1,511 Next Last