The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 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 321st GolfingSuccess 🇬🇷 884 348 6ms 11 Mar 2025 322nd dvargas46 🇺🇸 884 403 2ms 2 Feb 2023 323rd MeWhenI 🇻🇦 884 439 1ms 11 Nov 2022 323rd xsot 🇸🇬 884 439 1ms 31 Aug 2024 325th jasonphicks 884 441 230ms 9 Jun 2020 326th tayloia 🇬🇧 884 454 13ms 12 Jan 2023 326th lukegustafson 🇺🇸 884 454 9ms 7 Dec 2023 326th emgordon154 884 454 9ms 10 Aug 2024 329th annaproxy 884 497 14ms 15 Jun 2023 330th saracen 884 509 289ms 7 Dec 2020 331st timvermeulen 884 511 168ms 4 Jan 2020 332nd primo-ppcg 🇹🇭 884 567 1,747ms 9 Jun 2024 333rd lifthrasiir 🇰🇷 883 423 7ms 19 Dec 2024 334th Bubbler-4 883 425 33ms 29 Nov 2021 335th Shanethegamer 🇺🇸 883 470 1,311ms 16 Mar 2023 336th janlelis 882 431 31ms 2 Feb 2021 336th olivermrose 🇺🇸 882 431 37ms 27 Aug 2021 336th ovs-code 🇩🇪 882 431 33ms 16 Mar 2024 339th stefangimmillaro 882 439 1,271ms 3 Nov 2022 340th REOScotte 882 442 287ms 12 Jan 2026 341st omurakazuaki 🇯🇵 882 455 10ms 21 Sep 2019 341st SubsTheTechnomancer 882 455 11ms 2 Mar 2023 341st neel11235813 882 455 10ms 26 Mar 2024 344th pardouin 🇫🇷 882 463 2,726ms 10 Jun 2025 345th btjones0 882 512 161ms 26 Dec 2020 346th Yewzir 🇧🇪 882 534 33ms 6 days ago 347th Steffan153 🇫🇮 881 363 10ms 16 Feb 2026 348th albanian-laundromat 881 464 2ms 26 Oct 2025 349th GolfingSuccess 🇬🇷 881 483 1ms 29 Jan 2024 350th frosster 🇨🇦 881 484 1ms 22 Jan 2026 351st nwellnhof 🇩🇪 881 511 304ms 9 Oct 2020 351st kkoenig 881 511 291ms 7 Sep 2025 353rd clockworknazo 880 431 3ms 27 Oct 2022 354th dwayneparton 880 432 37ms 6 May 2020 354th tatzyr 🇯🇵 880 432 35ms 18 Nov 2024 356th taimanh229 880 456 11ms 30 Dec 2020 356th Liniarc 880 456 10ms 21 Nov 2024 358th sean-niemann 🇺🇸 880 472 80ms 10 Aug 2023 359th yanqui-uxo 880 491 134ms 5 Sep 2018 360th GrayJoKing 🇦🇺 879 443 7ms 7 Dec 2025 361st primo-ppcg 🇹🇭 879 485 1ms 5 Oct 2020 362nd MeWhenI 🇻🇦 879 512 269ms 26 Aug 2023 363rd scpchicken 🇵🇼 879 514 251ms 19 May 2022 364th ovs-code 🇩🇪 878 432 3ms 10 Feb 2023 364th error256 878 432 3ms 16 Jun 2024 366th DaCuteRaccoon 878 444 257ms 1 Oct 2022 366th DialFrost 🇸🇬 878 444 261ms 7 Jan 2023 366th PowershellKnut 🇳🇴 878 444 286ms 13 Jan 2023 366th Jaykul 878 444 259ms 29 Apr 2024 366th 5quiwyrm 878 444 301ms 2 Sep 2025 371st MeWhenI 🇻🇦 878 473 1,268ms 8 Jun 2023 372nd snoozingnewt 🇨🇦 878 486 114ms 1 Dec 2025 373rd dpethes 878 528 57ms 10 Jan 2024 374th Steffan153 🇫🇮 877 349 40ms 22 Aug 2024 375th GolfingSuccess 🇬🇷 877 408 2ms 13 Jan 2022 375th Bubbler-4 877 408 2ms 19 Jan 2022 377th GolfingSuccess 🇬🇷 877 444 6ms 30 Dec 2024 378th Ashikpaul 🇮🇳 877 458 9ms 26 Apr 2021 378th coreynash 877 458 9ms 26 Sep 2023 378th jbt 877 458 9ms 24 Dec 2023 378th olleicua 🇺🇸 877 458 10ms 10 Jan 2024 378th xyangst 877 458 9ms 23 Sep 2024 383rd peeveen 🇬🇧 877 474 390ms 8 Sep 2023 384th CarsonChr 🇺🇸 877 515 286ms 24 Dec 2023 384th tylerlaprade 877 515 172ms 13 Jun 2025 386th MeWhenI 🇻🇦 876 365 10ms 13 Dec 2023 387th Natanaelel 🇸🇪 876 442 1,264ms 28 Jul 2021 388th sean-niemann 🇺🇸 876 452 5ms 20 May 2025 389th Yewzir 🇧🇪 876 486 1ms 8 Jun 2024 390th namelessiw 876 511 451ms 6 Oct 2025 390th kmathis22 876 511 526ms 14 Oct 2025 392nd jared-hughes 875 434 31ms 20 Sep 2022 393rd zhiayang 875 459 10ms 29 Aug 2020 393rd AnAwesomGuy 875 459 10ms 17 Sep 2025 393rd voytxt 🇨🇿 875 459 10ms 29 Nov 2025 396th MeWhenI 🇻🇦 875 461 153ms 7 Jun 2023 397th MEAN-stack 875 494 119ms 8 Feb 2021 398th dokutan 874 434 3ms 3 Dec 2025 399th JRaspass 🇬🇧 874 443 1,257ms 18 Jan 2023 400th ryanlanegit 874 446 269ms 23 Jun 2022 First Prev 321–400 of 4,083 Next Last
