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?
All holes in Perl 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 Holes Points Bytes Submitted 321st sanscheese 1 589 107 21 Jul 2023 322nd raphaelimahorn 1 585 41 3 Aug 2021 323rd nayakrujul 1 583 48 3 Jan 2023 324th bwat2 1 583 72 6 Apr 2022 325th kmathis22 1 583 84 5 Sep 2025 326th rai-gaurav 1 580 612 12 Jul 2020 327th andybearman 1 575 73 29 Sep 2017 327th aliakseikalosha 1 575 73 22 Apr 2021 329th awnion 1 571 42 20 Oct 2022 330th knileuh 1 564 629 22 Dec 2017 331st amazingalek 🇳🇴 1 560 75 16 Dec 2025 332nd speles 🇺🇦 1 558 43 12 Nov 2023 333rd rvdnieuwendijk 🇳🇱 2 557 1,073 21 Oct 2020 334th georg-mavridis 2 556 422 14 May 2020 335th Voltrifrodec 🇸🇰 1 554 112 23 Apr 2025 336th Starwort 🇬🇧 1 553 38 22 Oct 2018 337th caynraiser 1 553 76 7 Dec 2021 338th jngbsn 1 552 67 11 Mar 2019 339th SpareManiKatti 3 551 2,162 19 Apr 2022 340th hyvyys 1 549 51 21 Sep 2020 341st copoer 1 545 77 27 Feb 2023 342nd Erendis42 1 538 78 14 Apr 2020 343rd ashtraypettingzoo 🇺🇸 1 533 45 14 Feb 2023 343rd epic-programmer-guy 1 533 45 20 Dec 2023 345th p-vf 🇨🇭 1 527 55 28 Oct 2021 346th edsrzf 🇳🇿 1 522 46 18 Sep 2024 346th desecaw13 1 522 46 24 Jan 2025 348th pizie11 1 519 81 12 Jan 2024 349th juntuu 1 518 56 25 Mar 2019 349th Unknownuserfrommars 1 518 56 5 Aug 2025 351st paudr 1 512 41 7 May 2019 351st PkmnQ 1 512 41 10 Apr 2024 351st RYSF13 🇨🇳 1 512 41 17 May 2025 354th owen-c-parker 🇺🇸 1 511 47 24 Nov 2022 355th jacobly0 🇺🇸 1 501 527 15 Aug 2023 355th LHLaurini 🇧🇷 1 501 527 14 Jul 2024 355th prestosilver 🇺🇸 1 501 527 20 days ago 358th MichaelMBradley 🇨🇦 1 500 48 6 Apr 2022 359th orifu 1 500 82 24 Feb 2021 360th rholliday 1 500 84 24 Feb 2021 360th RoscoeDaWah 🇬🇧 1 500 84 17 Sep 2023 362nd deejayy 1 494 85 1 May 2019 362nd dmoa 1 494 85 29 Nov 2019 364th oceko 1 490 49 26 Nov 2022 364th CheeseCake628 🇳🇴 1 490 49 14 Feb 2023 364th jacekwladzinski 1 490 49 2 Oct 2025 367th zapwai 1 488 86 20 Aug 2024 368th ConorOBrien-Foxx 1 483 58 2 Mar 2019 369th ZakkkkAttackkkk 🇵🇭 1 477 44 14 Dec 2021 369th fredrik-bakke 🇳🇴 1 477 44 29 Sep 2022 371st buddy1616 1 468 79 26 Apr 2019 372nd KyanJeuring 1 467 90 7 Sep 2022 372nd vhoulbreque 🇫🇷 1 467 90 24 Jan 2026 374th gurviche 1 462 52 30 Apr 2018 375th weliveinhell 🇭🇹 1 457 46 1 Oct 2023 376th eiburns 1 453 53 7 Sep 2023 376th Zach1031 1 453 53 16 Nov 2025 378th gabrieldhofer 1 444 54 6 Nov 2020 379th ehulinsky 🇺🇸 2 442 1,111 26 Mar 2025 380th GolfGPT 1 440 84 19 Nov 2023 381st KaeruCT 1 439 66 7 Oct 2020 382nd tomh1012 1 431 65 13 Oct 2020 382nd Bejofo 1 431 65 2 Apr 2021 384th RedzGoose 🇦🇺 1 429 98 11 Jun 2024 385th Chesium 2 420 1,061 6 Aug 2020 386th ArturLukianov 1 416 101 17 Dec 2020 387th Maximizer02 1 414 58 1 Oct 2023 388th CedricGebistorf 1 407 59 6 Feb 2022 389th jiaminglimjm 🇲🇾 1 407 113 11 Dec 2019 390th sirhalos 2 406 963 17 Sep 2017 391st pengu1n-master 1 404 104 20 May 2022 392nd davidl2 1 394 71 9 Sep 2019 393rd kittrz9 5 390 4,218 7 Dec 2017 394th andrew3600 1 389 54 20 Aug 2018 395th pique0822 1 389 72 26 Jan 2023 396th twocatsinatrenchcoat 1 389 108 25 Apr 2022 397th puzzleninja 1 385 109 18 Jul 2019 398th rick-gnous 1 381 63 4 Sep 2021 398th martinnorling 🇸🇪 1 381 63 7 Apr 2022 400th GWStuart 2 378 1,127 15 Sep 2023 First Prev 321–400 of 490 Next Last