The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Morse Encoder 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 640th vgamula 🇺🇦 397 345 10ms 7 Jul 2025 642nd shreyasminocha 395 345 11ms 2 Aug 2020 643rd nephila-nacrea 🇬🇧 394 275 3ms 24 Jun 2020 644th OllieBoyne 🇬🇧 393 349 11ms 23 Jan 2021 644th SB-945 393 349 17ms 4 Sep 2023 644th Jacob385 393 349 13ms 1 May 2024 647th DaCoolOne 393 387 2ms 27 Feb 2020 648th Natanaelel 🇸🇪 390 312 3ms 23 Jun 2023 649th MeWhenI 🇻🇦 390 731 1,494ms 9 Feb 2025 650th SoliGhost 389 352 12ms 8 Jun 2025 651st masflam 388 309 548ms 6 May 2021 652nd jgbaldwinbrown 387 437 323ms 9 Jul 2021 653rd kjhughes097 🇬🇧 386 344 486ms 9 Dec 2020 654th aksyristos 386 355 10ms 14 Mar 2023 654th codewrite 🇬🇧 386 355 10ms 12 Jul 2025 656th ozkxr 385 354 10ms 27 Apr 2020 657th ian-h-chamberlain 🇺🇸 385 455 228ms 4 Aug 2022 658th arcpolaris 384 346 453ms 11 Nov 2025 659th juliansiebert 🇩🇪 383 298 417ms 15 Jun 2025 660th tomh1012 383 347 477ms 21 Sep 2022 661st jfallon1997 383 358 10ms 13 May 2024 662nd LucaArgentiUCF 🇮🇹 383 484 46ms 25 Jan 2021 663rd jahakari 382 348 426ms 21 Nov 2021 664th betaveros 382 359 9ms 1 Jan 2023 665th dzshn 381 360 10ms 25 Nov 2020 665th stordev 381 360 12ms 26 Feb 2021 665th richard-oelze 🇩🇪 381 360 10ms 20 Mar 2021 665th 77Tigers 381 360 10ms 28 May 2021 669th LSWdigital 381 403 14ms 15 Dec 2021 670th jerrandolph 381 444 362ms 3 Nov 2023 671st Yewzir 🇧🇪 381 475 1,899ms 7 May 2024 672nd Blendi-Goose 380 401 2ms 5 Oct 2025 673rd tobeannouncd 380 493 128ms 29 Apr 2024 674th biinari 378 294 35ms 25 Mar 2018 675th pandapawskat 378 339 1ms 22 Sep 2021 676th labster 378 352 5ms 10 Mar 2018 677th yzhs 🇩🇪 377 295 36ms 20 Jul 2022 678th dokutan 376 296 36ms 21 Apr 2025 679th acollett89 376 363 11ms 5 Aug 2025 680th 0xjac 🇨🇭 376 450 316ms 9 Jun 2025 681st dijs 375 364 11ms 20 Dec 2019 681st madeforlosers 375 364 10ms 30 Nov 2023 683rd marcin7Cd 375 439 5ms 5 Apr 2021 684th eiburns 373 367 10ms 8 May 2023 685th SpareManiKatti 372 367 10ms 14 Oct 2021 686th temoto 371 369 10ms 20 Sep 2018 687th CaedenHarper 🇨🇦 370 370 10ms 10 Oct 2024 688th BuBuaBu 369 412 1ms 30 Aug 2023 689th modellking 368 362 5ms 22 Mar 2018 690th brochmann 🇸🇪 368 372 10ms 9 Feb 2022 690th ridingqwerty 🇺🇸 368 372 11ms 3 Dec 2023 692nd PotatoSaladOverlord 367 373 9ms 16 Jan 2024 693rd TheZwierzLF 🇵🇱 366 336 541ms 8 Dec 2025 694th pickerj 366 374 11ms 5 Jun 2024 695th CheeseCake628 🇳🇴 365 337 524ms 18 Oct 2025 696th ChrisTheisen 365 364 435ms 19 Dec 2022 697th ragerin 365 375 17ms 21 Feb 2018 698th croc54 364 376 10ms 14 Jan 2025 699th msbranicky 363 466 367ms 31 Aug 2023 700th m42km 362 378 12ms 23 Oct 2023 700th klixel 🇨🇦 362 378 9ms 23 Jan 2025 702nd scpchicken 🇵🇼 362 417 5ms 19 Apr 2023 702nd dokutan 362 417 4ms 2 Apr 2024 704th Jacob385 361 341 814ms 1 May 2024 705th bac0id 361 368 443ms 4 Jul 2024 706th unfinishedprogram 361 378 11ms 28 Nov 2023 707th pandapawskat 360 308 2ms 27 Aug 2021 708th krencl 360 370 5ms 28 Apr 2020 709th 4ndyJ 🇬🇧 360 380 10ms 19 Jun 2025 710th Waffle3z 359 310 36ms 22 Jan 2021 711th mokymok 🇺🇸 359 382 11ms 1 Dec 2021 712th ian-odonnell 357 382 10ms 14 Mar 2018 713th dsntzn 🇸🇰 356 383 11ms 2 Mar 2021 714th msbranicky 355 372 3,714ms 11 Jan 2025 715th wrhm 354 387 11ms 12 Dec 2020 716th KevinMarquette 🇺🇸 353 323 283ms 23 Apr 2022 717th jackkav 353 386 11ms 14 Apr 2018 718th michelebastione 🇮🇹 351 390 11ms 21 Mar 2022 719th CaedenHarper 🇨🇦 349 353 805ms 19 Jan 2025 720th TimCurwick 🇺🇸 348 328 264ms 29 Jul 2020 First Prev 641–720 of 1,009 Next Last
