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 274th QuincyNash 🇺🇸 968 19 1ms 21 Jan 2022 274th Bonjour27891 🇻🇳 968 19 1ms 27 Jan 2022 274th gurglemurgle5 968 19 1ms 25 Feb 2022 274th Alex-x90 🇺🇸 968 19 1ms 15 Mar 2022 274th Super-Pizza 🇨🇦 968 19 1ms 6 Apr 2022 274th voytxt 🇨🇿 968 19 1ms 9 Apr 2022 274th jared-hughes 968 19 1ms 18 Apr 2022 274th saito-ta 🇯🇵 968 19 1ms 18 May 2022 274th solmyr2000 968 19 1ms 12 Jun 2022 274th dvargas46 🇺🇸 968 19 1ms 23 Jun 2022 274th michael-pruglo 🇺🇦 968 19 1ms 6 Jul 2022 274th 4hg 🇺🇸 968 19 1ms 17 Sep 2022 274th Steffan153 🇫🇮 968 19 1ms 25 Sep 2022 274th DialFrost 🇸🇬 968 19 1ms 8 Nov 2022 274th trist224 🇫🇷 968 19 1ms 28 Nov 2022 274th DaCuteRaccoon 968 19 1ms 1 Dec 2022 274th MCausc78 🇺🇦 968 19 1ms 5 Jan 2023 274th BREMAUCY 🇫🇷 968 19 1ms 12 Jan 2023 274th Pimveha 968 19 1ms 16 Jan 2023 274th Betuaredead 968 19 1ms 18 Jan 2023 274th neel11235813 968 19 1ms 4 Feb 2023 274th Yewzir 🇧🇪 968 19 2ms 5 Feb 2023 274th stonethurg 968 19 1ms 10 Feb 2023 274th jmerle 🇳🇱 968 19 1ms 11 Feb 2023 274th gilufin 968 19 1ms 27 Mar 2023 274th klixel 🇨🇦 968 19 1ms 4 May 2023 274th signorovitch 968 19 1ms 5 Jun 2023 274th ndren 968 19 1ms 31 Jul 2023 274th adamnielson42 🇺🇸 968 19 1ms 16 Aug 2023 274th Siri-chan 968 19 1ms 17 Aug 2023 274th snoozingnewt 🇨🇦 968 19 1ms 15 Sep 2023 274th weliveinhell 🇭🇹 968 19 1ms 24 Sep 2023 274th CornerMercury 🇬🇧 968 19 1ms 27 Sep 2023 274th FlyingPenguin223 968 19 1ms 29 Sep 2023 274th madeforlosers 968 19 1ms 3 Nov 2023 274th minhtrancccp 968 19 1ms 2 Dec 2023 274th nsprd 968 19 1ms 24 Jan 2024 274th dokutan 968 19 1ms 26 Jan 2024 274th TheBaconPug 968 19 1ms 18 Feb 2024 274th siltyy 968 19 1ms 20 Mar 2024 274th sciencejiho 968 19 1ms 26 Apr 2024 274th HumanoidCPU 968 19 1ms 12 May 2024 274th xPMo 968 19 1ms 28 Jun 2024 274th Ralac07 🇦🇺 968 19 1ms 4 Jul 2024 274th elttil 968 19 2ms 10 Jul 2024 274th pardouin 🇫🇷 968 19 1ms 19 Jul 2024 274th helbling 🇨🇭 968 19 1ms 24 Jul 2024 274th CaedenHarper 🇨🇦 968 19 1ms 6 Aug 2024 274th Jacob385 968 19 1ms 6 Sep 2024 274th duckyluuk 🇳🇱 968 19 1ms 19 Sep 2024 274th b-illy 🇬🇧 968 19 1ms 29 Sep 2024 274th xyangst 968 19 1ms 8 Oct 2024 274th edsrzf 🇳🇿 968 19 1ms 23 Oct 2024 274th GolfingSuccess 🇬🇷 968 19 1ms 8 Nov 2024 274th lifthrasiir 🇰🇷 968 19 1ms 9 Nov 2024 274th wh3n3v3r 🇨🇿 968 19 1ms 18 Nov 2024 274th LostSyntax21 🇬🇧 968 19 1ms 21 Nov 2024 274th nomennescio 968 19 1ms 12 Dec 2024 274th Salutations45 968 19 1ms 12 Jan 2025 274th KasperKivimaeki 🇫🇮 968 19 1ms 25 Feb 2025 274th JunkIce 968 19 1ms 26 Feb 2025 274th plcc0 968 19 1ms 31 Mar 2025 274th commandz0 🇺🇸 968 19 1ms 3 May 2025 274th fuzzylojik-golf 🇺🇸 968 19 1ms 21 May 2025 274th gigaprofisi 🇺🇸 968 19 1ms 29 Jun 2025 274th ridingqwerty 🇺🇸 968 19 1ms 3 Aug 2025 274th qpwoeirut 968 19 1ms 23 Aug 2025 274th albanian-laundromat 968 19 1ms 7 Oct 2025 274th Babafaba 968 19 2ms 22 Oct 2025 274th luuumine 🇫🇷 968 19 2ms 28 Oct 2025 274th FortuiteMan 🇫🇷 968 19 1ms 1 Nov 2025 274th JOrE20 968 19 2ms 7 Nov 2025 274th emgordon154 968 19 1ms 18 Jan 2026 274th anter69 🇭🇺 968 19 2ms 1 Feb 2026 274th SectorCorruptor 968 19 2ms 5 Feb 2026 274th aksyristos 968 19 2ms 23 hours ago 477th error256 964 12 57ms 1 Feb 2026 478th xsot 🇸🇬 961 25 34ms 28 Mar 2018 478th ConorOBrien-Foxx 961 25 32ms 10 Apr 2018 478th thospel 961 25 35ms 1 May 2018 First Prev 401–480 of 5,781 Next Last
