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 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 641st GrayJoKing 🇦🇺 656 222 21ms 19 Apr 2022 642nd fantaize 656 308 213ms 17 days ago 643rd KatieLG 🇬🇧 655 223 395ms 30 Jul 2024 644th MeWhenI 🇻🇦 655 283 310ms 26 Aug 2023 645th prplz 🇦🇺 654 219 21ms 28 Mar 2021 645th Irratix 🇳🇱 654 219 11ms 30 Sep 2021 647th albanian-laundromat 654 298 81ms 8 Sep 2025 648th luuumine 🇫🇷 654 309 187ms 18 Nov 2025 649th GolfingSuccess 🇬🇷 652 130 2,935ms 17 Feb 2026 650th medzes 652 169 26ms 24 Jul 2023 651st kmathis22 652 280 2ms 28 Jan 2026 652nd elgan65536 🇺🇸 652 310 216ms 19 Mar 2024 653rd retrohun 651 184 576ms 16 Dec 2022 654th RustemB 🇷🇺 649 83 4ms 9 Apr 2021 654th Yewzir 🇧🇪 649 83 4ms 9 Feb 2023 656th CatsAreFluffy 646 222 3ms 6 Mar 2023 657th GolfingSuccess 🇬🇷 644 155 223ms 6 Jan 2026 658th frankgraziano 644 186 60ms 14 Feb 2026 659th primo-ppcg 🇹🇭 640 136 188ms 22 Oct 2021 660th MeWhenI 🇻🇦 640 167 349ms 29 Jan 2023 661st Irratix 🇳🇱 640 256 66ms 3 Aug 2023 662nd janbehrens 🇩🇪 639 143 660ms 1 Nov 2021 663rd michelebastione 🇮🇹 638 229 461ms 26 Dec 2025 664th MeWhenI 🇻🇦 637 202 129ms 16 Oct 2022 665th m33m33 🇫🇷 636 131 420ms 5 Apr 2021 666th marcin7Cd 633 264 207ms 1 Feb 2021 667th JOrE20 631 308 67ms 23 Feb 2026 668th MeWhenI 🇻🇦 631 309 40ms 26 Aug 2023 669th CatsAreFluffy 627 261 176ms 6 Mar 2023 670th Shanethegamer 🇺🇸 626 215 1,709ms 6 Jun 2023 671st ian-h-chamberlain 🇺🇸 626 323 226ms 29 Jun 2022 672nd Bubbler-4 624 84 35ms 9 Dec 2021 673rd varhammer 624 268 113ms 10 Jan 2024 674th JRaspass 🇬🇧 624 297 302ms 20 May 2022 675th stefangimmillaro 622 235 449ms 15 Jul 2023 676th dokutan 621 140 46ms 7 days ago 677th janbehrens 🇩🇪 620 293 576ms 21 Nov 2022 678th quimey 619 87 4ms 23 Mar 2023 679th rifatx 619 236 460ms 12 Jul 2024 680th Shanethegamer 🇺🇸 616 229 41ms 6 Apr 2022 681st Shanethegamer 🇺🇸 616 295 439ms 24 Sep 2025 682nd bac0id 614 238 459ms 4 Jul 2024 683rd Shanethegamer 🇺🇸 613 302 330ms 1 Oct 2021 684th frankgraziano 612 88 4ms 3 Dec 2020 685th MeWhenI 🇻🇦 612 180 28ms 24 Mar 2022 686th bac0id 611 268 3,169ms 3 Jul 2024 687th Natanaelel 🇸🇪 609 84 1,237ms 31 Jul 2022 688th anter69 🇭🇺 608 143 50ms 1 Feb 2023 688th bzijlema 🇳🇱 608 143 51ms 27 Oct 2025 688th plcc0 608 143 93ms 12 Jan 2026 691st msbranicky 608 300 96ms 10 Aug 2023 692nd stefangimmillaro 607 210 3,537ms 16 Nov 2024 693rd jared-hughes 605 198 12ms 18 Jul 2022 694th Bonjour27891 🇻🇳 604 144 101ms 25 Jan 2022 694th jared-hughes 604 144 42ms 6 Apr 2022 694th TFeld00 🇩🇰 604 144 62ms 19 May 2022 694th Eilonlif 🇮🇱 604 144 1,051ms 15 Sep 2022 694th aksyristos 604 144 50ms 20 Jan 2023 694th rak1507 🇬🇧 604 144 206ms 3 Mar 2023 694th vgamula 🇺🇦 604 144 33ms 14 Aug 2023 694th firegene 🇮🇪 604 144 38ms 24 Dec 2023 694th jamopher 604 144 34ms 21 Feb 2024 694th stertooy 🇧🇪 604 144 80ms 17 Jun 2024 694th ahmetdemirag 🇨🇾 604 144 34ms 31 Dec 2024 694th andrewjc2000 604 144 45ms 17 Mar 2025 694th dirckvdende 604 144 350ms 12 Jul 2025 694th klixel 🇨🇦 604 144 41ms 19 Jul 2025 694th wuduculfre 604 144 369ms 22 Jul 2025 694th InigoK 🇺🇸 604 144 116ms 4 Sep 2025 694th JOrE20 604 144 64ms 23 Feb 2026 711th SirBogman 🇺🇸 602 87 189ms 28 Jul 2024 712th dokutan 601 213 134ms 22 Jun 2024 713th RYNO8 600 145 46ms 28 Aug 2021 713th davecame 600 145 36ms 30 Apr 2024 713th cefqrn 600 145 37ms 26 May 2024 713th bricknellj 600 145 99ms 27 Jun 2024 713th lifthrasiir 🇰🇷 600 145 30ms 20 Nov 2024 713th cros107 🇦🇺 600 145 823ms 21 Nov 2025 713th Flekay 🇩🇪 600 145 10ms 6 hours ago 720th Yewzir 🇧🇪 600 406 1,947ms 14 Nov 2025 First Prev 641–720 of 1,189 Next Last