The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 321st KatieLG 🇬🇧 707 256 109ms 15 Jan 2023 322nd SniperSmiley 🇺🇸 706 194 10ms 23 Jun 2021 322nd quimey 706 194 12ms 17 Jul 2023 322nd davecame 706 194 11ms 22 Nov 2023 322nd ndren 706 194 11ms 26 Nov 2025 326th MeWhenI 🇻🇦 706 214 4ms 6 Aug 2023 327th nathanadams 🇳🇿 703 194 10ms 7 Sep 2021 327th Natanaelel 🇸🇪 703 194 10ms 9 Jun 2023 329th mateusz-sterczewski 702 195 11ms 20 Nov 2024 330th didroe 700 159 37ms 20 Nov 2024 331st MeWhenI 🇻🇦 700 195 10ms 3 Aug 2024 332nd billings7 🇬🇧 699 190 438ms 21 Nov 2021 332nd primo-ppcg 🇹🇭 699 190 435ms 21 Nov 2021 334th benwilliamgraham 699 196 10ms 26 Jan 2019 334th dzhang314 699 196 17ms 15 Aug 2019 334th 5quiwyrm 699 196 10ms 28 Jan 2026 337th janbehrens 🇩🇪 697 172 238ms 13 Jul 2022 338th rzv-me 697 191 4ms 30 Sep 2024 339th lynn 696 115 3ms 27 May 2022 340th mrxz 🇳🇱 696 196 12ms 27 Jun 2019 341st DialFrost 🇸🇬 693 173 357ms 21 Feb 2024 342nd MeWhenI 🇻🇦 692 192 4ms 12 Aug 2024 343rd albanian-laundromat 692 228 41ms 5 Dec 2025 344th janbehrens 🇩🇪 689 193 5ms 2 Jul 2023 345th Informagier 688 199 18ms 16 Sep 2020 346th Ripick 687 234 386ms 11 Aug 2024 347th stefangimmillaro 686 255 197ms 13 Nov 2023 348th MeWhenI 🇻🇦 686 264 45ms 4 Sep 2024 349th stefangimmillaro 685 194 421ms 11 Oct 2023 350th tayloia 🇬🇧 685 199 11ms 17 Jan 2023 351st olivermrose 🇺🇸 683 163 35ms 4 Feb 2022 352nd m-tkach 🇺🇦 682 201 10ms 13 Feb 2023 353rd emgordon154 680 178 1,451ms 20 Aug 2024 354th KatieLG 🇬🇧 680 181 520ms 19 Apr 2025 355th dokutan 680 232 450ms 24 Sep 2025 356th jacklynnepenick 678 202 12ms 28 Aug 2021 357th MeWhenI 🇻🇦 673 161 3ms 16 Apr 2023 358th annaproxy 671 229 20ms 22 Feb 2023 359th dokutan 670 356 3ms 3 Dec 2025 360th voytxt 🇨🇿 669 204 11ms 30 Jul 2024 360th emgordon154 669 204 9ms 9 Aug 2024 362nd albanian-laundromat 669 240 2ms 6 Nov 2025 363rd o0lit3 🇺🇸 668 162 4ms 14 Oct 2020 364th lelbal 668 205 10ms 8 Oct 2024 365th KatieLG 🇬🇧 666 167 36ms 10 Apr 2022 365th Lv0Sys 🇵🇱 666 167 35ms 30 Nov 2025 367th KatieLG 🇬🇧 665 205 12ms 16 Apr 2021 368th StardustGogeta 665 206 17ms 5 Aug 2020 368th zbreit 🇺🇸 665 206 10ms 5 Aug 2020 368th rschwa6308 🇺🇸 665 206 11ms 6 Aug 2020 371st h3ra993huskp 🇯🇵 663 238 723ms 30 Nov 2025 372nd albanian-laundromat 662 207 10ms 6 Nov 2025 373rd janbehrens 🇩🇪 661 201 400ms 17 Jun 2023 374th scpchicken 🇵🇼 660 164 3ms 25 Feb 2023 375th bluebear94 659 175 142ms 2 Mar 2018 376th dokutan 659 182 274ms 6 Nov 2024 377th inventshah 658 185 278ms 12 Jul 2022 378th albanian-laundromat 656 172 1,589ms 22 Nov 2025 379th thisishowmymindworks 🇳🇴 656 208 11ms 5 Oct 2020 380th MeWhenI 🇻🇦 653 173 1,331ms 15 Sep 2025 381st MeWhenI 🇻🇦 652 207 1ms 13 Oct 2023 382nd sambirnbaum1 652 210 10ms 13 Oct 2019 382nd j-Ewan 652 210 10ms 3 Mar 2022 384th user189032 650 210 10ms 29 May 2019 385th emgordon154 647 172 35ms 20 Aug 2024 386th scpchicken 🇵🇼 647 178 154ms 25 Feb 2023 387th BambooleanLogic 🇸🇪 647 211 11ms 19 Oct 2022 388th davitf 646 212 11ms 31 Oct 2018 388th RYNO8 646 212 10ms 14 Oct 2021 390th dokutan 645 249 2ms 8 Sep 2025 391st KatieLG 🇬🇧 644 428 2ms 16 Jan 2023 392nd Lv0Sys 🇵🇱 643 212 10ms 30 Nov 2025 393rd Troon 643 213 10ms 18 Apr 2025 394th janbehrens 🇩🇪 643 217 464ms 24 Mar 2022 395th tdkkdt 🇷🇺 642 207 452ms 21 Nov 2021 396th stuartcarnie 642 282 163ms 18 Apr 2020 397th IISResetMe 641 178 317ms 29 Dec 2025 398th phdphil 640 180 109ms 9 Apr 2018 399th marcin7Cd 640 214 10ms 14 Mar 2020 399th Pulencode 🇨🇨 640 214 10ms 17 Nov 2024 First Prev 321–400 of 1,009 Next Last
