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 558th jz268 892 460 10ms 6 Jul 2022 558th tooningelaere 892 460 10ms 4 Dec 2022 558th Fracture17 892 460 10ms 2 Apr 2023 558th dscholtz-lab49 892 460 10ms 15 May 2023 558th ndren 892 460 31ms 23 Dec 2023 558th CommandLeo 🇮🇹 892 460 10ms 4 Oct 2025 567th GolfingSuccess 🇬🇷 892 468 168ms 5 Jun 2022 568th D-MOVE 🇵🇭 891 437 35ms 3 Feb 2026 569th TaserTheFox 🇺🇸 891 447 243ms 8 Jun 2023 570th Faweks1 891 461 10ms 3 Aug 2018 570th elldur 891 461 10ms 17 Mar 2019 570th ludwig-n 891 461 9ms 7 Apr 2021 570th Indivicivet 891 461 9ms 26 Oct 2021 570th sultan 891 461 31ms 7 Jun 2022 570th idavidka 🇭🇺 891 461 10ms 17 May 2023 570th driri85 891 461 34ms 16 Feb 2024 570th kalex 891 461 9ms 17 Jul 2024 578th GrayJoKing 🇦🇺 891 463 67ms 17 Oct 2023 579th Attero 🇸🇪 891 476 388ms 21 Nov 2021 579th Gaddy 🇫🇷 891 476 385ms 3 May 2022 579th hemphen 891 476 407ms 28 Aug 2022 582nd user189032 891 499 124ms 29 May 2019 583rd lukechampine 891 518 304ms 16 Apr 2020 583rd edsrzf 🇳🇿 891 518 290ms 4 Mar 2025 585th dokutan 890 454 125ms 27 Dec 2025 586th ovs-code 🇩🇪 890 475 550ms 9 Mar 2022 587th yzhs 🇩🇪 890 500 123ms 24 Jul 2021 587th janAkali 🇷🇺 890 500 127ms 7 Oct 2024 589th AnAwesomGuy 890 513 401ms 10 Jan 2026 590th israem 889 448 274ms 14 Apr 2024 591st Ashikpaul 🇮🇳 889 458 9ms 26 Apr 2021 591st coreynash 889 458 9ms 26 Sep 2023 591st jbt 889 458 9ms 24 Dec 2023 591st olleicua 🇺🇸 889 458 10ms 10 Jan 2024 591st xyangst 889 458 9ms 23 Sep 2024 596th daedals 889 462 10ms 19 Jun 2019 596th xbjfk 889 462 10ms 25 Nov 2020 596th tpaxman 🇨🇦 889 462 10ms 15 Dec 2020 596th myleopard 889 462 10ms 29 Jan 2021 596th inventshah 889 462 10ms 27 Apr 2022 596th Edjyzod 889 462 10ms 3 Oct 2022 596th apreg 889 462 10ms 1 Jun 2023 596th emgordon154 889 462 11ms 14 Apr 2025 596th AnAwesomGuy 889 462 9ms 21 Dec 2025 605th luciaaibarblanco 🇪🇸 889 477 432ms 21 Nov 2021 606th ETHproductions 🇺🇸 888 468 309ms 21 Dec 2018 607th Andriamanitra 🇫🇮 888 475 4ms 13 Jun 2024 608th MeWhenI 🇻🇦 888 476 580ms 4 Mar 2022 609th aditsu 888 479 2,652ms 11 Aug 2025 609th dokutan 888 479 2,496ms 29 Aug 2025 611th Shanethegamer 🇺🇸 888 480 3ms 22 Mar 2023 612th marcin7Cd 887 362 8ms 6 Feb 2021 613th paulhey 887 449 251ms 27 Sep 2021 614th zhiayang 887 459 10ms 29 Aug 2020 614th AnAwesomGuy 887 459 10ms 17 Sep 2025 614th voytxt 🇨🇿 887 459 10ms 29 Nov 2025 617th Fishron 887 463 10ms 28 Dec 2021 617th TaserTheFox 🇺🇸 887 463 11ms 27 Apr 2023 617th jeff-at-tamer-dot-codes 🇺🇸 887 463 10ms 31 May 2023 617th JasonMcCallion 887 463 29ms 20 Dec 2023 617th CaedenHarper 🇨🇦 887 463 10ms 24 Jul 2024 617th jatloe 887 463 9ms 23 Oct 2024 617th snydej 887 463 9ms 29 Dec 2024 624th primo-ppcg 🇹🇭 887 465 68ms 16 Oct 2023 625th MWI-polygolf 887 503 105ms 6 Dec 2023 626th TeodorDyakov 🇧🇬 887 515 449ms 21 Jan 2026 627th makononov 887 521 185ms 28 Feb 2025 627th KasperKivimaeki 🇫🇮 887 521 166ms 7 Oct 2025 629th lynn 886 412 41ms 16 Oct 2023 630th AlephSquirrel 886 453 533ms 22 Jan 2024 631st Attero 🇸🇪 886 459 5ms 25 Sep 2023 632nd AnAwesomGuy 886 480 2,761ms 18 Dec 2025 633rd strout 886 502 121ms 15 Aug 2022 634th MostParsingVex 886 507 62ms 23 Jan 2025 635th SephQ 885 440 34ms 31 Dec 2020 635th JRaspass 🇬🇧 885 440 36ms 18 Jan 2023 637th erdnaxeli 🇫🇷 885 455 1,294ms 17 Apr 2021 638th KatieLG 🇬🇧 885 460 9ms 2 May 2021 638th jordanmbell 885 460 8ms 7 Dec 2021 638th polyrtm 885 460 11ms 17 Mar 2022 First Prev 561–640 of 4,082 Next Last
