The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. 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 638th rummik 885 460 11ms 18 Oct 2022 638th trinityy-7 885 460 9ms 2 Oct 2023 638th helbling 🇨🇭 885 460 10ms 24 Feb 2024 644th dzhang314 885 464 10ms 14 Aug 2019 644th DialFrost 🇸🇬 885 464 10ms 9 Feb 2023 644th eiburns 885 464 10ms 26 Oct 2023 644th kurkale6ka 885 464 9ms 3 Dec 2023 644th Vaekor 885 464 10ms 7 Feb 2024 644th l-donovan 885 464 11ms 27 Jun 2024 644th FortuiteMan 🇫🇷 885 464 10ms 17 Oct 2024 644th vhoulbreque 🇫🇷 885 464 11ms 30 Nov 2025 644th KatieLG 🇬🇧 885 464 9ms 9 Jan 2026 653rd EthanSansom 885 488 83ms 17 Oct 2025 654th MeWhenI 🇻🇦 885 522 212ms 13 Nov 2022 654th vidanm 🇫🇷 885 522 196ms 11 Jun 2025 656th Shanethegamer 🇺🇸 884 459 2ms 22 Mar 2023 657th sean-niemann 🇺🇸 884 495 1ms 14 Jul 2025 658th johnnythedoggie 884 505 99ms 10 Oct 2020 659th inventshah 884 508 61ms 16 Sep 2023 660th albanian-laundromat 884 522 293ms 4 Dec 2025 661st UnderKoen 🇳🇱 884 535 2ms 3 Feb 2024 662nd kurkale6ka 883 398 5ms 31 Aug 2021 663rd 386asm 🇺🇸 883 400 51ms 24 Apr 2023 664th Shanethegamer 🇺🇸 883 456 1,330ms 28 Jul 2021 665th user189032 883 461 10ms 29 May 2019 665th ScottHamper 883 461 10ms 25 Jun 2021 665th nathanadams 🇳🇿 883 461 9ms 29 Aug 2021 665th LukeBridges 🇬🇧 883 461 10ms 20 Oct 2022 665th inventshah 883 461 10ms 23 Jan 2023 665th cloudyshoe 883 461 9ms 20 May 2025 671st stordev 883 465 11ms 26 Feb 2021 671st omkarjois 883 465 10ms 17 Oct 2021 671st rickypoon 883 465 10ms 22 Jul 2022 671st DrPiranoid 883 465 10ms 26 Sep 2022 671st joll05 🇸🇪 883 465 10ms 1 Nov 2022 671st SirBogman 🇺🇸 883 465 10ms 5 Jan 2023 671st ehulinsky 🇺🇸 883 465 10ms 7 May 2023 671st erikji 883 465 9ms 3 Feb 2025 671st CornerMercury 🇬🇧 883 465 10ms 26 Oct 2025 680th revlayle 🇺🇸 883 480 374ms 31 May 2022 681st nwellnhof 🇩🇪 883 509 62ms 9 Jan 2022 682nd GinjaNinja32 883 523 210ms 16 Apr 2020 683rd JesperJ 882 452 258ms 9 Jun 2020 683rd rvdnieuwendijk 🇳🇱 882 452 283ms 23 Oct 2020 683rd IISResetMe 882 452 262ms 21 Dec 2025 686th GolfingSuccess 🇬🇷 882 455 448ms 15 Jan 2024 686th snoozingnewt 🇨🇦 882 455 470ms 11 Feb 2024 688th detrumi 🇳🇱 882 471 244ms 25 Oct 2020 688th Lv0Sys 🇵🇱 882 471 599ms 30 Nov 2025 690th SubsTheTechnomancer 881 442 35ms 3 Mar 2023 690th snoozingnewt 🇨🇦 881 442 34ms 23 Sep 2023 692nd p01 881 462 10ms 13 Jan 2018 692nd daifkyou 881 462 10ms 14 Dec 2022 692nd weliveinhell 🇭🇹 881 462 10ms 25 Dec 2023 695th lrustand 881 466 9ms 3 Feb 2018 695th TobyBoyne 🇬🇧 881 466 9ms 1 Jun 2019 695th RDShah 881 466 10ms 2 Feb 2020 695th dim-an 881 466 10ms 8 Dec 2020 695th OllieBoyne 🇬🇧 881 466 9ms 31 Dec 2020 695th ihalseide 🇺🇸 881 466 9ms 5 Jun 2021 695th Anonymousellama21 881 466 9ms 9 May 2022 695th jakobkordez 🇸🇮 881 466 9ms 19 Oct 2022 695th CatsAreFluffy 881 466 10ms 18 Dec 2022 695th PaulMWeiser 881 466 10ms 25 Mar 2023 695th MWI-polygolf 881 466 11ms 6 Dec 2023 695th logvp 881 466 10ms 12 Jan 2024 695th PotatoSaladOverlord 881 466 9ms 19 Jan 2024 695th smilesformiles3 881 466 10ms 11 Jun 2025 695th Aphadion 881 466 10ms 19 Feb 2026 710th tomh1012 881 481 421ms 3 Dec 2025 711th stefangimmillaro 881 489 111ms 28 Nov 2022 712th Attero 🇸🇪 881 497 1ms 3 Apr 2020 713th Natanaelel 🇸🇪 881 505 114ms 11 Mar 2022 713th eddiesmithxyz 881 505 120ms 7 Jan 2023 715th stellartux 880 472 291ms 25 Dec 2023 716th jws305 880 482 381ms 21 Nov 2021 716th RainOrigami 🇩🇪 880 482 382ms 21 Dec 2021 716th sean-niemann 🇺🇸 880 482 1ms 16 Jan 2022 719th rowan-OzRunways 880 507 98ms 15 Aug 2020 719th HumanoidCPU 880 507 100ms 5 May 2024 First Prev 641–720 of 4,082 Next Last
