The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 23 mins. Why not try and solve them ahead of time?
12 Days of Christmas 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 sean-niemann 🇺🇸 909 463 157ms 14 Nov 2023 402nd lynn 909 522 27ms 11 Jul 2023 403rd textninja 908 429 35ms 26 Sep 2020 404th Frowny 908 432 33ms 13 May 2021 405th okhoel 🇳🇴 908 439 255ms 21 Sep 2022 406th DynamiteBear 908 452 10ms 24 Nov 2022 406th minhtrancccp 908 452 10ms 2 Oct 2023 406th blaztoma 🇱🇹 908 452 10ms 22 Sep 2025 406th ahmetdemirag 🇨🇾 908 452 11ms 3 Oct 2025 410th DialFrost 🇸🇬 907 354 6ms 21 Jan 2025 411th olivermrose 🇺🇸 907 444 1,269ms 28 Oct 2021 412th cywong-amino 🇭🇰 907 449 9ms 7 Oct 2020 413th BlankSpruce 907 466 439ms 27 Nov 2024 414th Steffan153 🇫🇮 907 475 113ms 29 Mar 2023 415th saracen 907 509 289ms 7 Dec 2020 416th Shanethegamer 🇺🇸 907 523 25ms 28 Dec 2022 417th SirBogman 🇺🇸 906 433 33ms 16 Apr 2022 418th hasan1st 906 440 223ms 16 Jun 2022 419th BlankSpruce 906 450 10ms 27 Aug 2024 420th kg583 🇺🇸 906 453 10ms 17 Nov 2022 420th albanian-laundromat 906 453 10ms 11 Nov 2025 420th sudhackar 906 453 10ms 26 Feb 2026 423rd namelessiw 906 468 375ms 26 Oct 2024 424th yanqui-uxo 906 491 134ms 5 Sep 2018 425th h3ra993huskp 🇯🇵 906 504 488ms 30 Nov 2025 426th dokutan 906 546 76ms 3 days ago 427th Salutations45 905 450 9ms 26 Dec 2024 428th CaedenHarper 🇨🇦 905 464 1,144ms 6 Sep 2025 429th marcus-gomes-v 🇧🇷 904 355 6ms 14 Dec 2021 430th janlelis 904 431 31ms 2 Feb 2021 430th olivermrose 🇺🇸 904 431 37ms 27 Aug 2021 430th ovs-code 🇩🇪 904 431 33ms 16 Mar 2024 433rd jasonphicks 904 441 230ms 9 Jun 2020 434th orthoplex 🇨🇽 904 454 10ms 14 Jan 2022 434th paralysedforce 904 454 9ms 7 Aug 2023 434th aditya-u 904 454 9ms 6 Jul 2024 434th Emutis 🇱🇹 904 454 10ms 26 Dec 2024 434th Kyogre-Primal 🇺🇦 904 454 10ms 16 May 2025 434th zhaohm14 904 454 10ms 16 May 2025 440th sean-niemann 🇺🇸 904 469 366ms 30 Oct 2024 441st Shanethegamer 🇺🇸 904 477 108ms 31 Oct 2024 442nd frosster 🇨🇦 904 484 1ms 22 Jan 2026 443rd timvermeulen 904 511 166ms 4 Jan 2020 444th KrausRaus 🇺🇸 903 451 10ms 18 Dec 2022 444th apreg 903 451 9ms 20 May 2023 444th snoozingnewt 🇨🇦 903 451 9ms 13 Oct 2025 447th primo-ppcg 🇹🇭 903 485 1ms 5 Oct 2020 448th dokutan 903 492 2ms 30 Nov 2025 449th primo-ppcg 🇹🇭 903 506 428ms 1 Aug 2021 450th nwellnhof 🇩🇪 903 511 304ms 9 Oct 2020 450th kkoenig 903 511 291ms 7 Sep 2025 452nd dwayneparton 902 432 37ms 6 May 2020 452nd tatzyr 🇯🇵 902 432 35ms 18 Nov 2024 454th GrayJoKing 🇦🇺 902 445 453ms 16 Jan 2024 454th m-tkach 🇺🇦 902 445 447ms 21 Jan 2024 454th MeWhenI 🇻🇦 902 445 501ms 24 May 2024 454th error256 902 445 498ms 12 Aug 2024 458th myfatemi04 902 455 10ms 1 Mar 2018 458th neihousaigaai 902 455 10ms 26 Dec 2021 458th AlephSquirrel 902 455 9ms 7 Jan 2023 458th SubsTheTechnomancer 902 455 11ms 28 Feb 2023 458th chartung17 902 455 10ms 31 Dec 2023 458th neel11235813 902 455 10ms 26 Mar 2024 458th FranklinJiaChen 902 455 9ms 12 Jun 2024 458th souta-1326 902 455 11ms 27 Mar 2025 458th Baroniket 902 455 10ms 13 Aug 2025 467th inventshah 902 473 2ms 19 Aug 2023 468th btjones0 902 512 161ms 26 Dec 2020 468th MeWhenI 🇻🇦 902 512 269ms 26 Aug 2023 470th REOScotte 901 442 287ms 12 Jan 2026 471st BBoehm 🇩🇪 901 452 8ms 11 Feb 2021 471st dwayneparton 901 452 9ms 8 Sep 2021 471st uttumuttu 🇫🇮 901 452 10ms 4 Jan 2022 474th sean-niemann 🇺🇸 901 469 576ms 11 Nov 2025 475th MCausc78 🇺🇦 901 494 300ms 5 Jan 2023 476th NewDefectus 🇮🇱 900 456 9ms 8 Nov 2020 476th yanjs 900 456 9ms 1 Oct 2021 476th Irratix 🇳🇱 900 456 9ms 29 Apr 2022 476th stefangimmillaro 900 456 11ms 18 Nov 2022 476th GolfingSuccess 🇬🇷 900 456 10ms 25 Dec 2023 First Prev 401–480 of 4,087 Next Last
