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 Decoder 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 markbyrne 302 429 10ms 26 Oct 2020 641st haydenridd 302 429 10ms 26 Oct 2020 643rd mintypython 300 405 10ms 19 Oct 2018 644th Yewzir 🇧🇪 299 442 10ms 26 Dec 2024 645th ereztaiar 🇮🇱 296 410 13ms 11 Sep 2021 646th zakariamouhid 296 411 11ms 2 Aug 2023 647th ethandhunt 295 439 10ms 21 Jul 2021 648th TheEric0802 🇩🇪 295 583 2ms 22 Sep 2023 649th dokutan 294 510 4ms 9 Dec 2024 650th rollershutter 293 442 10ms 25 May 2024 651st adoxography 292 348 42ms 1 Jun 2018 652nd JoeBigToe 292 392 274ms 5 Jun 2020 653rd joonaspu 292 443 10ms 14 Jun 2023 654th MeWhenI 🇻🇦 291 1,326 38ms 28 Aug 2023 655th madex 🇩🇪 290 350 41ms 13 May 2024 656th sergeyz7 🇬🇧 290 394 283ms 15 Nov 2020 657th martinnorling 🇸🇪 290 446 10ms 20 Jun 2022 657th CutSandstone 290 446 10ms 5 Jul 2024 659th olligobber 🇦🇺 290 631 141ms 22 May 2020 660th dokutan 289 873 2ms 9 Dec 2024 661st evanrittner 284 456 10ms 26 Feb 2021 662nd ques0942 282 459 10ms 2 Oct 2019 663rd Dazza314 🇬🇧 281 460 11ms 4 Nov 2020 664th bsoyka 🇺🇸 281 461 11ms 9 Jan 2022 665th lowlighter 280 434 10ms 1 Nov 2020 666th guliyevemil1 🇦🇿 278 466 10ms 16 Apr 2020 667th lahell 277 413 319ms 2 Jul 2020 668th robin-scragg 277 467 12ms 28 Sep 2025 669th schachmattmatt 276 469 11ms 20 Aug 2021 669th te-chnical 276 469 9ms 18 Jan 2026 671st KevinMarquette 🇺🇸 275 416 301ms 7 Jun 2020 672nd 007lock 275 700 311ms 11 May 2020 673rd june410 🇨🇦 274 472 17ms 5 Jun 2024 674th boxjelly 272 374 35ms 12 Feb 2021 675th retrohun 272 403 2ms 26 Aug 2025 676th frederikb 272 510 711ms 9 Sep 2020 677th JunkIce 270 480 17ms 12 Nov 2024 678th dokutan 270 678 134ms 16 Jan 2026 679th D1CED 267 620 22ms 17 Nov 2021 680th MeWhenI 🇻🇦 266 792 47ms 7 Sep 2024 681st dokutan 265 727 62ms 3 Jul 2025 682nd JunkIce 260 471 925ms 3 Dec 2024 683rd joshvd 260 498 10ms 31 Aug 2019 684th ian-h-chamberlain 🇺🇸 260 705 245ms 12 Oct 2020 685th chunky 259 976 2ms 1 Oct 2020 686th omgardner 257 503 10ms 4 Feb 2019 687th Trunksistor 🇫🇷 256 505 10ms 6 May 2022 688th MeWhenI 🇻🇦 256 585 4ms 16 Apr 2023 689th zuparnowa 255 508 17ms 12 Feb 2019 689th henrytranter 255 508 18ms 20 Sep 2019 691st Andrey2001 254 509 11ms 14 Dec 2025 692nd JOrE20 254 632 160ms 27 Jan 2026 693rd luuumine 🇫🇷 252 514 10ms 29 Oct 2025 694th nlc 250 407 34ms 12 Apr 2018 695th MeWhenI 🇻🇦 249 839 4ms 27 Jul 2023 696th MeWhenI 🇻🇦 247 443 3ms 25 Dec 2025 697th kurkale6ka 247 456 3ms 27 Dec 2023 698th scottJsonar 247 524 11ms 29 Nov 2019 699th gabrielsqw 246 526 11ms 24 Oct 2023 700th Andrey2001 245 501 1,286ms 28 Jan 2026 701st two-bad 🇬🇧 243 500 10ms 25 Feb 2024 702nd dokutan 242 453 3ms 9 Dec 2024 703rd myleopard 242 534 10ms 22 Dec 2022 704th dokutan 242 583 2ms 24 Dec 2024 705th adesanjo 241 537 10ms 30 Oct 2018 705th Mikey-Beep 🇬🇧 241 537 10ms 25 Aug 2023 707th dokutan 241 631 94ms 10 Dec 2024 708th Yewzir 🇧🇪 239 541 10ms 11 Apr 2023 709th schachmattmatt 238 427 35ms 20 Aug 2021 710th varhammer 238 583 8ms 5 Mar 2022 711th twocatsinatrenchcoat 237 546 14ms 12 May 2022 712th The-Wolfson 237 675 740ms 1 Nov 2024 713th Vaekor 236 548 11ms 18 Nov 2020 714th olivi-r 235 550 11ms 9 Aug 2019 715th BBoehm 🇩🇪 233 521 11ms 4 Feb 2021 716th kewegmey 232 558 10ms 17 Apr 2024 717th dokutan 230 836 341ms 4 Feb 2025 718th mothcolada 🇺🇸 228 567 10ms 2 Mar 2021 719th Yewzir 🇧🇪 227 541 802ms 15 Jan 2024 720th jmerle 🇳🇱 225 576 10ms 11 Jul 2023 First Prev 641–720 of 899 Next Last
