The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. 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 801st olleicua 🇺🇸 499 281 65ms 4 Feb 2024 802nd MeWhenI 🇻🇦 498 167 349ms 29 Jan 2023 803rd vezzick 497 137 10ms 8 Mar 2021 804th klixel 🇨🇦 497 407 260ms 26 Aug 2023 805th olleicua 🇺🇸 496 98 708ms 4 Feb 2024 806th CaedenHarper 🇨🇦 495 295 377ms 17 Oct 2025 807th janbehrens 🇩🇪 495 331 3,093ms 20 Nov 2022 808th HumanoidCPU 493 138 10ms 6 Nov 2024 809th madex 🇩🇪 493 354 3ms 13 days ago 810th stellartux 492 280 57ms 24 Dec 2023 811th tdkkdt 🇷🇺 492 297 449ms 21 Nov 2021 812th Schmitt-Very-Cool 492 369 469ms 1 Oct 2025 813th cure-honey 🇯🇵 491 360 43ms 30 Nov 2020 814th rcmlz 486 72 128ms 13 Apr 2024 815th janbehrens 🇩🇪 484 296 2ms 7 Apr 2023 816th KatieLG 🇬🇧 483 369 710ms 9 Oct 2021 817th fitzdotlol 🇺🇸 482 200 10ms 21 Mar 2022 818th heanyang1 482 286 16ms 22 Apr 2025 819th gigaprofisi 🇺🇸 480 201 11ms 10 Aug 2025 820th retrohun 480 364 129ms 26 Dec 2022 821st heanyang1 479 299 1ms 20 Apr 2025 822nd tscherter 477 202 12ms 5 Dec 2020 823rd MeWhenI 🇻🇦 476 86 3ms 18 Jan 2022 824th bzijlema 🇳🇱 476 143 51ms 27 Oct 2025 825th Natanaelel 🇸🇪 474 84 1,237ms 31 Jul 2022 826th Bonjour27891 🇻🇳 473 144 101ms 25 Jan 2022 826th jared-hughes 473 144 42ms 6 Apr 2022 826th Eilonlif 🇮🇱 473 144 1,051ms 15 Sep 2022 826th aksyristos 473 144 50ms 20 Jan 2023 826th rak1507 🇬🇧 473 144 206ms 3 Mar 2023 826th firegene 🇮🇪 473 144 38ms 24 Dec 2023 826th stertooy 🇧🇪 473 144 80ms 17 Jun 2024 826th ahmetdemirag 🇨🇾 473 144 34ms 31 Dec 2024 826th andrewjc2000 473 144 45ms 17 Mar 2025 826th dirckvdende 473 144 350ms 12 Jul 2025 826th klixel 🇨🇦 473 144 41ms 19 Jul 2025 826th wuduculfre 473 144 369ms 22 Jul 2025 826th InigoK 🇺🇸 473 144 116ms 4 Sep 2025 839th gnlow 🇰🇷 473 204 10ms 14 Feb 2021 840th tomh1012 471 212 2ms 4 Feb 2026 841st RYNO8 470 145 46ms 28 Aug 2021 841st davecame 470 145 36ms 30 Apr 2024 841st cefqrn 470 145 37ms 26 May 2024 841st bricknellj 470 145 99ms 27 Jun 2024 841st cros107 🇦🇺 470 145 823ms 21 Nov 2025 846th JRaspass 🇬🇧 469 199 43ms 11 Jun 2022 847th MeWhenI 🇻🇦 469 271 153ms 7 Jul 2021 848th MeWhenI 🇻🇦 468 157 272ms 15 Feb 2023 849th primo-ppcg 🇹🇭 467 164 25ms 12 Feb 2022 850th HumanoidCPU 466 138 446ms 6 Nov 2024 851st Frowny 466 146 69ms 14 Feb 2022 852nd msbranicky 466 434 309ms 6 Oct 2023 853rd dokutan 465 158 523ms 7 Apr 2024 854th davitf 463 147 249ms 24 Nov 2020 854th alesfranek 463 147 215ms 4 Sep 2022 854th mousetail 🇳🇱 463 147 27ms 14 Dec 2022 854th shellbertt 🇨🇦 463 147 30ms 26 Feb 2023 858th madex 🇩🇪 462 216 2ms 13 days ago 859th HumanoidCPU 462 310 2ms 20 Jan 2025 860th hiddicop 🇸🇪 460 148 53ms 26 Jan 2021 860th moustave 460 148 54ms 3 Jul 2025 862nd Lv0Sys 🇵🇱 460 387 919ms 13 Dec 2025 863rd keelimeguy 🇺🇸 460 424 14ms 8 May 2025 864th Shanethegamer 🇺🇸 459 140 806ms 20 Jan 2025 865th MeWhenI 🇻🇦 458 204 5ms 16 Apr 2023 866th andre-lameirinhas 🇵🇹 457 149 273ms 14 Mar 2023 866th SB-945 457 149 11ms 16 Sep 2023 866th RaBa21 🇭🇺 457 149 11ms 18 Jul 2025 869th lynn 456 168 3,144ms 8 Sep 2021 870th MeWhenI 🇻🇦 455 77 126ms 31 Jan 2023 871st o0lit3 🇺🇸 455 205 3ms 15 Apr 2025 872nd stillnotdone 455 261 2ms 29 Aug 2021 873rd dokutan 454 107 39ms 27 Apr 2025 874th lemogne 452 317 2ms 9 Aug 2021 875th Omega65536 🇩🇪 451 151 30ms 22 Nov 2022 875th neihousaigaai 451 151 48ms 11 Oct 2024 875th TheZwierzLF 🇵🇱 451 151 11ms 17 May 2025 878th rodrigosetti 🇧🇷 451 306 297ms 19 Aug 2022 879th JRaspass 🇬🇧 449 78 132ms 29 Jul 2022 880th adoxography 449 215 20ms 22 Dec 2020 First Prev 801–880 of 1,186 Next Last