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?
Quine in all languages 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 478th somebody1234 961 25 36ms 11 Nov 2018 478th prplz 🇦🇺 961 25 35ms 20 Mar 2019 478th janlelis 961 25 35ms 12 Apr 2019 478th sapphyrus 961 25 34ms 2 Aug 2019 478th TFeld00 🇩🇰 961 25 34ms 7 Aug 2019 478th Lydxn 🇨🇦 961 25 35ms 30 Mar 2020 478th andersk 🇺🇸 961 25 35ms 11 May 2020 478th o0lit3 🇺🇸 961 25 34ms 2 Oct 2020 478th orthoplex 🇨🇽 961 25 36ms 4 Oct 2020 478th KatieLG 🇬🇧 961 25 37ms 26 Nov 2020 478th rak1507 🇬🇧 961 25 34ms 19 Feb 2021 478th BBoehm 🇩🇪 961 25 38ms 23 Feb 2021 478th NewDefectus 🇮🇱 961 25 35ms 4 May 2021 478th olivermrose 🇺🇸 961 25 34ms 23 Aug 2021 478th UladzimirSukharukau 961 25 34ms 15 Sep 2021 478th ozefe 🇹🇷 961 25 35ms 28 Oct 2021 478th SirBogman 🇺🇸 961 25 36ms 19 Nov 2021 478th akshatj27 🇦🇶 961 25 34ms 11 Jan 2022 478th fitzdotlol 🇺🇸 961 25 34ms 21 Mar 2022 478th anter69 🇭🇺 961 25 35ms 1 Apr 2022 478th Super-Pizza 🇨🇦 961 25 33ms 6 Apr 2022 478th voytxt 🇨🇿 961 25 35ms 20 May 2022 478th stefangimmillaro 961 25 34ms 21 May 2022 478th solmyr2000 961 25 35ms 12 Jun 2022 478th shinh 961 25 33ms 28 Jun 2022 478th michael-pruglo 🇺🇦 961 25 37ms 6 Jul 2022 478th jared-hughes 961 25 35ms 10 Sep 2022 478th Steffan153 🇫🇮 961 25 35ms 23 Oct 2022 478th Shanethegamer 🇺🇸 961 25 33ms 25 Oct 2022 478th 4hg 🇺🇸 961 25 34ms 9 Nov 2022 478th antimon2 🇯🇵 961 25 35ms 12 Nov 2022 478th DaCuteRaccoon 961 25 32ms 1 Dec 2022 478th neel11235813 961 25 35ms 23 Mar 2023 478th janbehrens 🇩🇪 961 25 35ms 16 May 2023 478th nwellnhof 🇩🇪 961 25 33ms 17 May 2023 478th weliveinhell 🇭🇹 961 25 35ms 26 Sep 2023 478th olleicua 🇺🇸 961 25 35ms 11 Jan 2024 478th dokutan 961 25 37ms 5 Jul 2024 478th LostSyntax21 🇬🇧 961 25 35ms 21 Aug 2024 478th FlyingPenguin223 961 25 34ms 18 Sep 2024 478th error256 961 25 36ms 17 Jan 2025 478th Lv0Sys 🇵🇱 961 25 34ms 8 Jun 2025 478th Just4FunCoder 961 25 34ms 18 Jun 2025 478th RYSF13 🇨🇳 961 25 35ms 2 Nov 2025 478th JOrE20 961 25 36ms 9 Nov 2025 478th GrayJoKing 🇦🇺 961 25 36ms 25 Dec 2025 478th Natanaelel 🇸🇪 961 25 35ms 25 Dec 2025 478th sean-niemann 🇺🇸 961 25 36ms 25 Dec 2025 478th m-tkach 🇺🇦 961 25 38ms 25 Dec 2025 478th fuzzylojik-golf 🇺🇸 961 25 37ms 25 Dec 2025 478th DialFrost 🇸🇬 961 25 36ms 25 Dec 2025 478th GolfingSuccess 🇬🇷 961 25 36ms 25 Dec 2025 478th CaedenHarper 🇨🇦 961 25 37ms 25 Dec 2025 478th snoozingnewt 🇨🇦 961 25 37ms 25 Dec 2025 478th MeWhenI 🇻🇦 961 25 36ms 25 Dec 2025 478th Yewzir 🇧🇪 961 25 34ms 26 Dec 2025 478th JayXon 🇺🇸 961 25 32ms 26 Dec 2025 478th emgordon154 961 25 32ms 26 Dec 2025 478th BREMAUCY 🇫🇷 961 25 38ms 26 Dec 2025 478th CornerMercury 🇬🇧 961 25 34ms 26 Dec 2025 478th ndren 961 25 35ms 26 Dec 2025 478th pardouin 🇫🇷 961 25 39ms 27 Dec 2025 478th radarek 🇵🇱 961 25 34ms 28 Dec 2025 478th ovs-code 🇩🇪 961 25 39ms 1 Jan 2026 478th primo-ppcg 🇹🇭 961 25 35ms 17 Jan 2026 478th sisyphus-ppcg 🇦🇺 961 25 35ms 2 Feb 2026 547th CatsAreFluffy 960 38 2ms 2 Jan 2023 547th Lydxn 🇨🇦 960 38 2ms 27 days ago 549th JRaspass 🇬🇧 959 21 3ms 3 Jan 2018 549th teebee 959 21 3ms 5 Feb 2018 549th thospel 959 21 3ms 28 Mar 2018 549th primo-ppcg 🇹🇭 959 21 3ms 3 Dec 2018 549th somebody1234 959 21 3ms 5 Dec 2018 549th prplz 🇦🇺 959 21 3ms 20 Mar 2019 549th retrohun 959 21 3ms 15 May 2019 549th TFeld00 🇩🇰 959 21 3ms 7 Aug 2019 549th AkashTandon167 959 21 3ms 15 Oct 2019 549th o0lit3 🇺🇸 959 21 3ms 19 Sep 2020 549th Lydxn 🇨🇦 959 21 3ms 6 Oct 2020 549th GrayJoKing 🇦🇺 959 21 3ms 20 Oct 2020 First Prev 481–560 of 5,781 Next Last
