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 401st dokutan 639 207 3,370ms 6 Nov 2024 402nd dloscutoff 634 189 754ms 23 Nov 2018 403rd msrawson 631 217 10ms 1 Sep 2018 403rd PatrickStephansen 🇿🇦 631 217 17ms 23 Aug 2023 405th janbehrens 🇩🇪 631 250 542ms 27 Jul 2022 406th roavin 630 211 398ms 23 Jun 2022 407th emgordon154 628 210 169ms 9 Aug 2024 408th Indivicivet 628 218 19ms 19 Oct 2021 409th primo-ppcg 🇹🇭 626 252 656ms 18 Oct 2021 410th hoodadam 623 220 12ms 12 Jun 2019 411th snoozingnewt 🇨🇦 623 235 92ms 17 Feb 2026 412th janbehrens 🇩🇪 622 174 3ms 23 Sep 2021 413th Natanaelel 🇸🇪 622 185 34ms 18 Nov 2023 414th KatieLG 🇬🇧 621 195 1,571ms 25 Apr 2021 415th BREMAUCY 🇫🇷 618 215 427ms 20 Jan 2023 416th dokutan 614 184 1,433ms 29 Aug 2025 417th jupj 🇫🇮 614 209 1ms 31 Aug 2022 418th frobinsonj 612 223 10ms 28 Mar 2018 419th ArmaanAS 612 224 11ms 26 Mar 2021 420th alexsave 609 224 10ms 13 Dec 2025 421st lacroixjonathan87 608 219 4ms 15 Sep 2020 422nd MeWhenI 🇻🇦 608 262 1,440ms 25 Jun 2023 423rd kaascevich 607 298 198ms 22 Jul 2025 424th adamnielson42 🇺🇸 606 226 10ms 21 Aug 2023 425th dokutan 605 223 2ms 26 Sep 2025 426th adamnielson42 🇺🇸 603 184 2ms 5 Dec 2023 427th andrewjc2000 603 227 10ms 18 Jul 2025 428th Lv0Sys 🇵🇱 602 199 245ms 30 Nov 2025 429th scpchicken 🇵🇼 601 221 448ms 6 Apr 2022 430th MeWhenI 🇻🇦 599 309 46ms 30 Dec 2023 431st MarcMush 🇫🇷 596 201 1,005ms 11 Jan 2024 432nd elisherer 🇮🇱 596 229 12ms 13 Apr 2019 433rd Eilonlif 🇮🇱 596 230 11ms 4 Nov 2022 433rd frankgraziano 596 230 16ms 5 Apr 2025 435th dokutan 596 241 528ms 30 Mar 2025 436th ArmaanAS 593 230 17ms 25 Mar 2021 437th amollberg 🇸🇪 593 231 18ms 16 Jan 2022 438th JDiLenarda 🇫🇷 592 269 1,398ms 29 Nov 2023 439th dokutan 591 217 1ms 30 Mar 2025 440th blaztoma 🇱🇹 591 268 133ms 1 Dec 2025 441st zuparnowa 585 234 10ms 8 Feb 2019 441st mathisfun271 585 234 12ms 18 Dec 2023 441st yuchuehw 585 234 10ms 4 Jan 2024 444th Alex-x90 🇺🇸 584 246 59ms 30 Dec 2022 445th Alex-x90 🇺🇸 583 220 2ms 30 Dec 2022 446th argusdusty 🇺🇸 583 235 17ms 11 Jan 2021 446th moustave 583 235 10ms 28 Mar 2025 448th jaredcrystal 🇺🇸 580 192 35ms 14 Dec 2020 449th alexkunin 580 235 12ms 4 Jul 2019 450th Mabeloid 🇳🇴 580 236 10ms 21 Sep 2024 451st coreynash 576 237 11ms 28 May 2024 452nd abailey2020 🇺🇸 571 328 121ms 20 Aug 2020 453rd rvdnieuwendijk 🇳🇱 567 201 298ms 26 Jun 2020 454th megaturbo 564 300 310ms 25 Jun 2020 455th boxjelly 564 332 141ms 23 Feb 2021 456th annaproxy 561 237 421ms 3 May 2022 457th Phanabani 🇺🇸 561 244 10ms 22 Oct 2020 458th James-Oswald 🇺🇸 559 257 420ms 10 Sep 2024 459th skps2010 557 246 17ms 29 Dec 2018 459th StefanHabel 🇨🇦 557 246 10ms 19 days ago 461st xkacer 🇨🇿 557 283 624ms 25 Jan 2021 462nd kevinmchung 555 247 18ms 24 Feb 2018 462nd b10011 🇫🇮 555 247 11ms 30 Dec 2022 462nd froggy2001 555 247 17ms 16 Feb 2023 465th yokasuretsu 554 208 134ms 4 May 2018 466th janbehrens 🇩🇪 554 261 3ms 9 Jun 2021 467th Andrey-Plotnikov 552 247 17ms 9 Nov 2024 468th bastienvoirin 🇫🇷 552 248 12ms 30 Nov 2020 469th mhsaul 548 250 12ms 10 Apr 2023 469th ceeb9 548 250 13ms 14 Jun 2024 471st BisheruBlade888 546 263 58ms 14 Jan 2022 472nd olleicua 🇺🇸 543 205 36ms 1 Apr 2024 473rd MeWhenI 🇻🇦 542 265 443ms 7 May 2023 474th gastropner 541 237 2ms 25 Dec 2020 475th emgordon154 540 245 3,290ms 17 May 2025 476th Lwi-Sandwich 539 254 11ms 20 Jul 2023 477th Waffle3z 538 283 2ms 1 Feb 2021 478th MeWhenI 🇻🇦 536 227 3ms 25 Dec 2025 479th bwat2 535 295 502ms 10 Feb 2022 480th MeWhenI 🇻🇦 534 522 7ms 28 Nov 2023 First Prev 401–480 of 1,009 Next Last
