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 721st jhpaques 🇫🇷 348 394 10ms 29 Jul 2022 722nd dokutan 345 910 11ms 24 Dec 2024 723rd Openstreetmapler 344 398 11ms 23 Nov 2019 724th titpetric 344 492 304ms 20 Apr 2020 725th SteveL-MSFT 343 333 270ms 10 Jun 2020 726th madex 🇩🇪 342 401 10ms 23 Jun 2024 727th KatieLG 🇬🇧 341 390 377ms 21 Nov 2021 728th Pena86 340 403 11ms 30 Dec 2021 728th ellis-rix 340 403 10ms 12 Jun 2023 730th Mikey-Beep 🇬🇧 339 404 11ms 25 Aug 2023 731st WalrusesAreAwesome 338 380 2ms 20 Feb 2026 732nd shaunjc 338 403 10ms 10 Jun 2021 733rd jotslo 🇬🇧 337 407 12ms 5 Jul 2021 734th rambox11 336 406 15ms 6 Dec 2019 735th bsoyka 🇺🇸 336 408 10ms 9 Jan 2022 736th lukehewittvandy 336 470 649ms 15 Jun 2020 737th The-Wolfson 336 539 106ms 1 Nov 2024 738th madex 🇩🇪 334 408 11ms 23 Jun 2024 739th madex 🇩🇪 333 363 1,586ms 23 Jun 2024 740th arcage 🇯🇵 333 364 1,410ms 10 Aug 2021 741st p-vf 🇨🇭 333 399 528ms 29 Sep 2021 742nd not-optikk 🇺🇸 332 459 1ms 16 Oct 2020 743rd denkyuu1 331 336 35ms 27 days ago 744th lrustand 331 414 11ms 19 Feb 2018 745th msbranicky 330 409 2ms 14 Oct 2023 746th Kibble 329 414 11ms 13 Jul 2020 747th dokutan 327 554 695ms 3 Feb 2026 748th Chinay-Domitrix 🇺🇸 322 411 3,508ms 25 Feb 2026 749th dokutan 322 885 1,531ms 12 Jan 2025 750th galloj 🇨🇿 319 381 3ms 31 Aug 2022 751st markbyrne 319 429 11ms 25 Oct 2020 752nd Vaekor 312 439 10ms 16 Nov 2020 753rd madex 🇩🇪 311 358 39ms 23 Jun 2024 754th HassanAliKadhem 🇧🇭 311 441 18ms 4 Jan 2022 755th GalladeGuy 🇺🇸 311 489 2ms 3 Sep 2018 756th Irratix 🇳🇱 311 603 116ms 21 Nov 2021 757th CallanMcNulty 310 440 11ms 20 Mar 2022 758th d4rkne55 308 432 5ms 1 Mar 2018 759th madex 🇩🇪 308 569 323ms 23 Jun 2024 760th NanduBC 306 447 12ms 23 Mar 2021 761st CutSandstone 306 448 16ms 5 Jul 2024 762nd sergeyz7 🇬🇧 305 374 246ms 18 Nov 2020 763rd Trunksistor 🇫🇷 305 449 11ms 19 Apr 2022 764th Laksen 🇩🇰 302 649 25ms 8 Jul 2021 765th b4dpxl 300 456 10ms 4 Dec 2019 765th bbakersmith 300 456 10ms 19 Jul 2021 767th Yewzir 🇧🇪 299 458 10ms 19 May 2023 767th Andrey2001 299 458 11ms 31 Jan 2026 769th jgbaldwinbrown 298 430 2ms 9 Jul 2021 770th Starwort 🇬🇧 298 459 12ms 4 Mar 2019 771st MeWhenI 🇻🇦 296 511 1,024ms 28 Mar 2022 772nd RJFuller 295 465 10ms 23 Feb 2024 773rd Maximizer02 295 581 7ms 10 Sep 2025 774th Agazoth 291 392 318ms 12 Jun 2020 775th vaughad 290 624 99ms 21 Jan 2020 776th johnennewdeeson 289 472 10ms 6 Apr 2020 777th rollershutter 289 474 10ms 19 Jul 2023 778th JunkIce 288 475 16ms 12 Feb 2025 779th boxjelly 285 391 37ms 12 Feb 2021 780th lahell 284 401 283ms 8 Jun 2020 781st Cr3aHal0 284 480 12ms 28 Jun 2019 782nd 21zz 284 483 10ms 2 Dec 2022 783rd DmytroLynda 282 471 445ms 21 Nov 2024 784th SiddharthShyniben 282 483 11ms 10 Aug 2021 785th eddvrs 282 485 12ms 20 Aug 2022 786th MeWhenI 🇻🇦 282 664 141ms 22 Mar 2024 787th MeWhenI 🇻🇦 282 979 2ms 8 Feb 2022 788th aglahir1 279 491 13ms 21 Jul 2022 789th shaunjc 277 481 5ms 11 Jun 2021 790th d4rkne55 277 492 10ms 28 Feb 2018 791st moshiba 277 494 10ms 18 Apr 2018 791st Re-Adventures 🇮🇳 277 494 10ms 1 Feb 2023 793rd mothcolada 🇺🇸 277 495 10ms 11 Mar 2021 794th dokutan 277 705 103ms 5 days ago 795th brandon-04 273 487 416ms 11 Nov 2025 796th Michiocre 272 501 11ms 18 Jun 2024 797th luuumine 🇫🇷 271 505 11ms 27 Oct 2025 798th valgardg 🇮🇸 271 506 10ms 10 Aug 2021 798th twocatsinatrenchcoat 271 506 10ms 10 May 2022 800th jtaxen 270 508 10ms 6 May 2024 First Prev 721–800 of 1,009 Next Last
