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 chars. 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 Chars Time Submitted 641st Shanethegamer 🇺🇸 624 494 514ms 25 Sep 2025 642nd chunky 624 719 2ms 1 Oct 2020 643rd Irratix 🇳🇱 623 508 116ms 18 Nov 2021 644th DaCuteRaccoon 623 533 162ms 2 Oct 2022 644th wackbyte 623 533 136ms 7 Nov 2023 644th blaztoma 🇱🇹 623 533 157ms 17 Aug 2025 647th GrayJoKing 🇦🇺 622 327 5ms 15 Feb 2023 647th blaztoma 🇱🇹 622 327 7ms 4 hours ago 649th dokutan 621 497 458ms 30 Nov 2025 650th 09cf 621 534 128ms 4 Oct 2023 651st ChristophHornung 620 395 393ms 12 May 2020 651st fleischa 620 395 375ms 12 May 2020 653rd Shanethegamer 🇺🇸 620 511 133ms 9 Jun 2022 654th ian-h-chamberlain 🇺🇸 620 535 162ms 26 Jul 2022 655th dbdr 619 536 128ms 5 Jan 2020 655th deltaphc 619 536 134ms 7 Jan 2020 655th fantaize 619 536 157ms 19 days ago 658th roelderickx 618 537 136ms 20 days ago 659th dokutan 617 491 118ms 12 Dec 2025 660th JDiLenarda 🇫🇷 617 508 1,309ms 7 Oct 2020 661st deerawj 617 538 157ms 7 Apr 2024 662nd bwenstar 616 307 10ms 11 Aug 2022 663rd SirBogman 🇺🇸 616 496 121ms 18 Jan 2020 664th raphaelimahorn 616 501 408ms 17 days ago 665th janbehrens 🇩🇪 615 442 5ms 3 Jul 2023 666th Liibe 614 502 458ms 25 Sep 2025 666th stefangimmillaro 614 502 480ms 6 Oct 2025 668th TheWhoAreYouPerson 614 540 154ms 4 Jan 2020 668th CatsAreFluffy 614 540 148ms 25 Nov 2024 670th annaproxy 613 497 14ms 15 Jun 2023 671st msbranicky 613 498 97ms 15 Sep 2023 672nd h3ra993huskp 🇯🇵 612 504 488ms 30 Nov 2025 673rd MeWhenI 🇻🇦 612 517 118ms 17 Sep 2024 674th NoUselessTech 612 542 140ms 20 Dec 2022 674th aumptl 🇦🇺 612 542 141ms 13 Nov 2024 674th elituf 612 542 140ms 4 Jan 2025 674th TannerJ07 🇺🇸 612 542 140ms 6 Apr 2025 678th Creative0708 🇨🇦 611 543 125ms 16 Dec 2023 679th gdyr 610 544 224ms 3 Mar 2023 680th primo-ppcg 🇹🇭 609 506 428ms 1 Aug 2021 681st Hillsoft 609 520 123ms 31 Jul 2022 682nd lacroixjonathan87 608 447 4ms 4 Aug 2020 683rd Luna1996 🇨🇳 608 524 4ms 9 Jan 2022 684th fraserli 🇦🇺 608 546 154ms 2 Jan 2022 685th olleicua 🇺🇸 607 304 34ms 10 Jan 2024 686th MWI-polygolf 607 503 105ms 6 Dec 2023 687th dokutan 606 578 113ms 3 Jul 2025 688th daisy-lau 605 356 10ms 3 Jul 2020 689th johnnythedoggie 605 505 99ms 10 Oct 2020 690th BlankSpruce 604 492 300ms 24 Nov 2024 691st namelessiw 604 511 451ms 6 Oct 2025 691st kmathis22 604 511 526ms 14 Oct 2025 693rd okaponta 604 549 146ms 13 Jan 2024 694th rak1507 🇬🇧 603 528 3ms 1 Apr 2021 695th rowan-OzRunways 602 507 98ms 15 Aug 2020 695th HumanoidCPU 602 507 100ms 5 May 2024 697th mattiapenati 602 551 160ms 28 Nov 2020 697th mad4j 🇮🇹 602 551 144ms 3 Jul 2021 699th aDwarfNamedUrist 601 552 129ms 21 Dec 2022 700th msbranicky 601 583 27ms 3 Jan 2024 701st dokutan 601 613 7ms 27 Oct 2023 702nd yujqiao 600 315 11ms 15 Dec 2025 703rd CallanMcNulty 600 359 11ms 20 Mar 2022 704th MeWhenI 🇻🇦 600 453 5ms 3 Jul 2023 705th adamnielson42 🇺🇸 600 531 4ms 10 Jan 2024 706th neel11235813 599 510 90ms 16 Mar 2024 706th snoozingnewt 🇨🇦 599 510 88ms 30 Apr 2024 706th dokutan 599 510 86ms 23 Sep 2024 709th TeodorDyakov 🇧🇬 599 515 449ms 21 Jan 2026 710th dokutan 598 311 533ms 30 Apr 2024 711th skrivy 598 454 4ms 31 Oct 2020 712th SubsTheTechnomancer 598 529 120ms 28 Mar 2023 712th snoozingnewt 🇨🇦 598 529 116ms 23 Sep 2023 712th neel11235813 598 529 118ms 26 Mar 2024 715th wlciii 🇺🇸 597 556 127ms 17 Nov 2021 716th Steffan153 🇫🇮 596 349 40ms 22 Aug 2024 717th dokutan 596 526 1,367ms 24 Mar 2025 718th germania 595 558 139ms 6 Jan 2020 719th dokutan 595 718 18ms 23 Feb 2026 720th try-except-try-accept 🇹🇭 594 318 10ms 9 Jul 2022 First Prev 641–720 of 4,056 Next Last
