The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. Why not try and solve them ahead of time?
Levenshtein Distance 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 401st m-tkach 🇺🇦 785 127 37ms 13 Feb 2024 402nd jared-hughes 783 183 5ms 23 Oct 2022 403rd DialFrost 🇸🇬 781 167 236ms 1 Dec 2025 404th jared-hughes 780 288 187ms 6 Jul 2024 405th nwellnhof 🇩🇪 778 45 162ms 22 Sep 2021 405th GrayJoKing 🇦🇺 778 45 179ms 26 Sep 2021 405th primo-ppcg 🇹🇭 778 45 153ms 26 Sep 2021 405th o0lit3 🇺🇸 778 45 166ms 27 Sep 2021 409th KatieLG 🇬🇧 778 107 419ms 15 May 2021 410th KatieLG 🇬🇧 778 124 13ms 5 Oct 2025 411th MeWhenI 🇻🇦 778 227 45ms 17 May 2023 412th MeWhenI 🇻🇦 776 188 411ms 13 Oct 2023 413th Yewzir 🇧🇪 775 110 224ms 15 May 2023 413th dokutan 775 110 220ms 14 Oct 2024 413th emgordon154 775 110 215ms 7 Jan 2025 416th Omega65536 🇩🇪 775 261 175ms 24 Nov 2022 417th arcage 🇯🇵 773 88 1,468ms 11 Jun 2021 418th roavin 773 189 495ms 27 Jul 2023 419th namelessiw 773 235 638ms 7 Oct 2025 420th Argeento 🇵🇱 772 125 18ms 24 Nov 2020 420th dmrichwa 🇺🇸 772 125 33ms 18 May 2022 420th Steffan153 🇫🇮 772 125 17ms 2 Mar 2023 423rd argusdusty 🇺🇸 772 262 216ms 21 Aug 2022 424th inventshah 771 186 7ms 5 Jun 2025 425th Florian-Mt 770 70 4ms 14 Nov 2023 426th btnlq 770 108 368ms 8 Mar 2021 427th marcin7Cd 770 165 369ms 12 Mar 2021 427th jtnuttall 770 165 301ms 5 Oct 2022 429th inventshah 769 213 2,947ms 30 Jan 2024 430th GolfingSuccess 🇬🇷 769 227 382ms 10 Sep 2022 431st msbranicky 768 111 211ms 1 Sep 2023 432nd voytxt 🇨🇿 768 370 1,566ms 28 Feb 2025 433rd Sp3000 🇦🇺 767 201 6ms 8 Aug 2022 434th DialFrost 🇸🇬 765 84 448ms 31 Dec 2025 434th m-tkach 🇺🇦 765 84 451ms 1 Jan 2026 434th ovs-code 🇩🇪 765 84 482ms 1 Jan 2026 434th GrayJoKing 🇦🇺 765 84 453ms 2 Jan 2026 434th CornerMercury 🇬🇧 765 84 463ms 4 Jan 2026 439th voytxt 🇨🇿 765 126 12ms 2 Feb 2025 440th Shanethegamer 🇺🇸 765 214 1,552ms 10 Jan 2024 441st targrik 765 242 330ms 4 Jul 2025 442nd KatieLG 🇬🇧 761 112 235ms 21 May 2021 443rd GrayJoKing 🇦🇺 759 127 13ms 10 Nov 2020 443rd olivermrose 🇺🇸 759 127 12ms 21 Sep 2021 443rd weliveinhell 🇭🇹 759 127 12ms 16 Nov 2023 446th GolfingSuccess 🇬🇷 758 54 447ms 21 Jan 2022 447th primo-ppcg 🇹🇭 758 158 2,394ms 26 Nov 2021 448th neel11235813 757 90 30ms 22 Jan 2024 448th 4atj 757 90 30ms 12 Jul 2025 448th AlephSquirrel 757 90 32ms 8 Oct 2025 448th ovs-code 🇩🇪 757 90 29ms 8 Oct 2025 448th GolfingSuccess 🇬🇷 757 90 28ms 8 Oct 2025 448th bizy-coder 757 90 31ms 8 Oct 2025 448th Bulmenisaurus 757 90 32ms 9 Oct 2025 448th Natanaelel 🇸🇪 757 90 30ms 9 Oct 2025 448th sisyphus-ppcg 🇦🇺 757 90 36ms 10 Oct 2025 448th GrayJoKing 🇦🇺 757 90 31ms 10 Oct 2025 448th StefanHabel 🇨🇦 757 90 32ms 11 Oct 2025 448th inventshah 757 90 29ms 14 Oct 2025 448th MeWhenI 🇻🇦 757 90 32ms 20 Oct 2025 448th zbreit 🇺🇸 757 90 33ms 30 Oct 2025 448th rschwa6308 🇺🇸 757 90 33ms 30 Oct 2025 448th StardustGogeta 757 90 32ms 30 Oct 2025 448th annaproxy 757 90 30ms 8 Nov 2025 448th HPWiz 🇳🇿 757 90 33ms 26 Nov 2025 448th CaedenHarper 🇨🇦 757 90 32ms 11 Dec 2025 448th nwellnhof 🇩🇪 757 90 33ms 4 Jan 2026 468th dizzyliam 757 110 450ms 28 Oct 2021 469th DialFrost 🇸🇬 757 240 579ms 23 Nov 2025 470th SirBogman 🇺🇸 756 110 320ms 27 Jan 2024 471st DialFrost 🇸🇬 756 231 728ms 3 Apr 2025 472nd snyderek 🇺🇸 755 217 480ms 19 Dec 2024 473rd Lydxn 🇨🇦 754 190 1,060ms 23 Jun 2021 474th ovs-code 🇩🇪 753 128 167ms 20 Nov 2024 475th btjones0 752 269 194ms 2 Jan 2021 476th DialFrost 🇸🇬 752 378 1,646ms 22 Jan 2025 477th m-tkach 🇺🇦 748 66 99ms 18 Jan 2023 478th edsrzf 🇳🇿 748 129 1,255ms 25 Oct 2024 479th JRaspass 🇬🇧 743 117 69ms 2 Mar 2026 480th DialFrost 🇸🇬 743 272 221ms 12 Apr 2025 First Prev 401–480 of 1,188 Next Last