The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 hours. 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 721st rowan-OzRunways 880 507 98ms 15 Aug 2020 721st HumanoidCPU 880 507 92ms 5 May 2024 723rd Attero 🇸🇪 880 519 446ms 1 May 2020 724th Shanethegamer 🇺🇸 880 525 183ms 11 Dec 2022 725th NewDefectus 🇮🇱 880 546 25ms 1 Sep 2021 726th aspett 879 448 71ms 16 May 2022 727th neel11235813 879 457 504ms 16 Mar 2024 727th Shanethegamer 🇺🇸 879 457 520ms 13 Sep 2024 729th BobbyGerace 879 463 10ms 21 May 2021 729th raphaelimahorn 879 463 10ms 17 Aug 2021 729th olivermrose 🇺🇸 879 463 8ms 10 Oct 2021 729th stefangimmillaro 879 463 9ms 23 Apr 2023 729th ryanocf 879 463 9ms 16 Jan 2024 729th two-bad 🇬🇧 879 463 10ms 3 Feb 2024 729th targrik 879 463 9ms 7 Feb 2025 729th dokutan 879 463 9ms 20 Apr 2025 737th TheAristos 879 467 10ms 25 Oct 2019 737th reedwilemon 879 467 9ms 12 Jun 2020 737th georgehulme 879 467 10ms 26 Jan 2022 737th SniperSmiley 🇺🇸 879 467 11ms 5 Dec 2022 737th nstearns96 🇬🇧 879 467 9ms 13 Jan 2023 737th isorlab49 879 467 10ms 24 May 2023 737th yzhs 🇩🇪 879 467 9ms 23 Jun 2023 737th LocNgu 879 467 9ms 13 Jul 2023 737th CorporalCrawdad 879 467 10ms 5 Sep 2024 737th andrewjc2000 879 467 10ms 25 Feb 2025 737th qpwoeirut 879 467 10ms 2 Oct 2025 737th jet689 879 467 10ms 3 Jan 2026 749th dokutan 879 485 2ms 21 Apr 2025 750th JOrE20 879 506 122ms 1 Nov 2025 751st sean-niemann 🇺🇸 879 511 56ms 17 Jan 2022 752nd lynn 878 447 34ms 3 Apr 2021 753rd jahakari 878 483 389ms 21 Nov 2021 753rd SmartK8 🇨🇿 878 483 423ms 30 Oct 2022 753rd speles 🇺🇦 878 483 1ms 29 Oct 2023 756th msbranicky 878 526 199ms 6 Oct 2023 756th dokutan 878 526 130ms 17 Oct 2024 758th gutierrezm00 877 444 34ms 16 Apr 2020 758th Shanethegamer 🇺🇸 877 444 34ms 28 Jul 2021 760th didion0 🇺🇸 877 464 9ms 8 Jan 2021 760th CatsAreFluffy 877 464 9ms 18 Dec 2022 760th iliazeus 877 464 10ms 10 Mar 2023 760th owen-c-parker 🇺🇸 877 464 8ms 29 Mar 2023 760th crammond 877 464 9ms 14 Aug 2023 760th Maznek 877 464 8ms 27 Dec 2023 760th thadeucity 877 464 8ms 23 May 2025 760th alexsave 877 464 9ms 16 Sep 2025 768th xorraxrax 877 468 10ms 31 Oct 2019 768th Crambor 877 468 9ms 9 Jan 2020 768th vort3 877 468 10ms 1 May 2020 768th urojony 🇵🇱 877 468 10ms 4 Jan 2021 768th NanduBC 877 468 10ms 14 Mar 2021 768th osmith93 877 468 10ms 31 Jul 2021 768th face0xff 877 468 10ms 28 Dec 2021 768th joshmoody24 877 468 10ms 4 Mar 2022 768th pascscha 877 468 10ms 9 May 2022 768th MaxElf999 877 468 10ms 29 Sep 2022 768th fredrik-bakke 🇳🇴 877 468 30ms 5 Oct 2022 768th za3k 877 468 10ms 12 Oct 2022 768th Troon 877 468 9ms 25 Oct 2022 768th commandz0 🇺🇸 877 468 10ms 21 Nov 2022 768th mathb0y512 877 468 10ms 20 Jan 2023 768th eddvrs 877 468 10ms 22 Dec 2023 768th JorgiEagle 877 468 10ms 8 Feb 2024 768th SB-945 877 468 10ms 17 Apr 2024 768th EnTerr 877 468 10ms 8 Sep 2024 768th lhulinsky 877 468 10ms 31 Oct 2024 768th dokutan 877 468 9ms 20 Apr 2025 768th jtyliu 877 468 9ms 6 Aug 2025 790th retrohun 877 476 4ms 20 Dec 2023 791st CaedenHarper 🇨🇦 877 521 485ms 10 Oct 2025 792nd thantos 876 465 8ms 21 Feb 2018 792nd m1el 876 465 9ms 28 Aug 2020 792nd CaedenHarper 🇨🇦 876 465 9ms 6 Sep 2025 795th iznax 876 484 389ms 21 Nov 2021 795th leth4 876 484 375ms 5 Jul 2023 797th Irratix 🇳🇱 876 508 116ms 18 Nov 2021 798th KatieLG 🇬🇧 876 527 331ms 25 Sep 2022 798th kimbo 🇺🇸 876 527 300ms 11 Jan 2023 800th DialFrost 🇸🇬 875 445 36ms 1 Jun 2024 First Prev 721–800 of 4,087 Next Last
