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 chars. 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 Chars Time Submitted 321st janbehrens 🇩🇪 616 177 10ms 18 May 2023 321st weliveinhell 🇭🇹 616 177 10ms 9 days ago 323rd primo-ppcg 🇹🇭 611 151 313ms 16 Dec 2020 324th Natanaelel 🇸🇪 610 132 35ms 9 Jun 2023 325th ryyyn 🇺🇸 609 153 10ms 29 Dec 2025 326th targrik 609 179 11ms 7 Jun 2025 327th stefangimmillaro 606 170 3,143ms 8 Nov 2024 328th blaztoma 🇱🇹 605 154 10ms 12 Feb 2026 329th janbehrens 🇩🇪 605 187 5ms 2 Jul 2023 330th dokutan 603 215 2ms 26 Sep 2025 331st h3ra993huskp 🇯🇵 603 230 723ms 30 Nov 2025 332nd inventshah 602 155 11ms 24 Jan 2023 332nd AlephSquirrel 602 155 11ms 27 Aug 2023 332nd mateusz-sterczewski 602 155 11ms 20 Nov 2024 335th adamnielson42 🇺🇸 601 176 2ms 5 Dec 2023 336th Natanaelel 🇸🇪 601 183 34ms 18 Nov 2023 337th dokutan 597 189 80ms 26 Jan 2026 338th MeWhenI 🇻🇦 593 254 1,440ms 25 Jun 2023 339th MeWhenI 🇻🇦 593 303 46ms 30 Dec 2023 340th kaascevich 592 292 198ms 22 Jul 2025 341st JDiLenarda 🇫🇷 591 255 1,398ms 29 Nov 2023 342nd StardustGogeta 590 158 17ms 5 Aug 2020 342nd zbreit 🇺🇸 590 158 10ms 5 Aug 2020 342nd rschwa6308 🇺🇸 590 158 11ms 6 Aug 2020 342nd thisishowmymindworks 🇳🇴 590 158 10ms 12 Oct 2020 346th billings7 🇬🇧 586 182 438ms 21 Nov 2021 346th primo-ppcg 🇹🇭 586 182 435ms 21 Nov 2021 348th nathanadams 🇳🇿 586 186 10ms 7 Sep 2021 349th tatzyr 🇯🇵 584 138 36ms 24 Feb 2025 350th Flekay 🇩🇪 583 160 10ms 15 Feb 2026 350th aksyristos 583 160 10ms 6 hours ago 352nd MeWhenI 🇻🇦 583 165 1,331ms 15 Sep 2025 353rd dokutan 582 233 528ms 30 Mar 2025 354th Natanaelel 🇸🇪 580 188 10ms 9 Jun 2023 355th emgordon154 579 176 1,451ms 20 Aug 2024 356th dokutan 577 209 1ms 30 Mar 2025 357th MeWhenI 🇻🇦 576 150 538ms 13 Jul 2024 358th alexkunin 571 191 12ms 4 Jul 2019 359th MeWhenI 🇻🇦 570 153 296ms 15 Feb 2023 360th bstrautin 570 162 297ms 26 Jul 2020 361st phdphil 569 128 109ms 9 Apr 2018 362nd marcin7Cd 569 164 10ms 14 Mar 2020 362nd bricknellj 569 164 10ms 20 Feb 2023 364th trinityy-7 568 192 12ms 5 Oct 2023 365th primo-ppcg 🇹🇭 568 244 656ms 18 Oct 2021 365th janbehrens 🇩🇪 568 244 542ms 27 Jul 2022 367th stefangimmillaro 567 188 421ms 11 Oct 2023 368th xkacer 🇨🇿 566 245 624ms 25 Jan 2021 369th AlexDaniel 🇪🇪 565 129 136ms 13 Mar 2018 370th daedals 565 165 10ms 29 May 2019 370th jared-hughes 565 165 11ms 10 Jan 2023 372nd Alex-x90 🇺🇸 565 240 59ms 30 Dec 2022 373rd GrayJoKing 🇦🇺 563 143 34ms 20 Jul 2021 374th Alex-x90 🇺🇸 563 214 2ms 30 Dec 2022 375th abailey2020 🇺🇸 560 320 121ms 20 Aug 2020 376th hiddicop 🇸🇪 559 144 34ms 30 Jan 2021 377th emgordon154 559 222 8ms 12 Dec 2024 378th jakobkordez 🇸🇮 558 167 12ms 31 Oct 2022 379th blaztoma 🇱🇹 558 268 133ms 1 Dec 2025 380th MeWhenI 🇻🇦 557 273 3ms 2 Oct 2022 381st boxjelly 557 322 121ms 23 Feb 2021 382nd stefangimmillaro 556 145 35ms 26 Dec 2024 383rd rucin93 🇵🇱 550 172 176ms 31 Oct 2024 384th roavin 549 194 398ms 23 Jun 2022 384th janbehrens 🇩🇪 549 194 397ms 10 Jul 2023 386th megaturbo 549 294 310ms 25 Jun 2020 387th shelerr 548 170 10ms 21 Aug 2025 388th KatieLG 🇬🇧 548 199 16ms 6 Apr 2022 388th dokutan 548 199 10ms 28 Mar 2025 390th DialFrost 🇸🇬 545 160 357ms 19 Jan 2024 391st Natanaelel 🇸🇪 544 126 3ms 14 Jun 2023 392nd James-Oswald 🇺🇸 544 249 420ms 10 Sep 2024 393rd Natanaelel 🇸🇪 540 135 147ms 9 Jun 2023 394th voytxt 🇨🇿 540 202 11ms 30 Jul 2024 395th Mabeloid 🇳🇴 539 274 2ms 21 Sep 2024 396th jared-hughes 537 150 36ms 20 Sep 2022 397th BambooleanLogic 🇸🇪 537 203 11ms 19 Oct 2022 398th RDShah 536 174 17ms 1 Dec 2019 399th lacroixjonathan87 536 211 4ms 15 Sep 2020 400th user189032 534 204 10ms 29 May 2019 First Prev 321–400 of 1,003 Next Last
