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 801st SimonWahlin 567 326 294ms 15 Jun 2020 802nd MeWhenI 🇻🇦 567 467 303ms 7 Jun 2023 802nd GrayJoKing 🇦🇺 567 467 316ms 1 Aug 2023 802nd prestosilver 🇺🇸 567 467 421ms 2 Feb 2026 805th neihousaigaai 567 544 430ms 27 Dec 2021 806th MWI-polygolf 566 468 310ms 6 Dec 2023 807th eMGeeneer 566 545 432ms 15 Jun 2024 808th MeWhenI 🇻🇦 566 619 25ms 8 Jul 2021 809th Shanethegamer 🇺🇸 565 469 395ms 11 Mar 2022 810th ocefra 565 481 4ms 6 Jan 2025 811th destofr 564 470 308ms 30 Dec 2022 812th KatieLG 🇬🇧 564 527 331ms 25 Sep 2022 812th kimbo 🇺🇸 564 527 300ms 11 Jan 2023 814th kylelemons 563 528 269ms 16 Apr 2020 815th marcin7Cd 562 362 8ms 6 Feb 2021 816th 0xjac 🇨🇭 562 529 304ms 15 Jun 2020 816th CaedenHarper 🇨🇦 562 529 293ms 20 Nov 2025 818th NewDefectus 🇮🇱 561 432 2ms 10 Feb 2021 819th sean-niemann 🇺🇸 561 472 317ms 7 Feb 2025 820th guliyevemil1 🇦🇿 561 530 304ms 16 Apr 2020 821st rbertram90 🇬🇧 560 485 4ms 11 Aug 2023 821st Pimentero 🇷🇺 560 485 4ms 14 Apr 2024 823rd kdaker 560 545 96ms 4 Jun 2020 824th daanpanis 560 551 399ms 22 May 2020 824th mokymok 🇺🇸 560 551 445ms 22 Oct 2021 826th DaCuteRaccoon 560 560 1,200ms 16 Apr 2022 827th CheeseCake628 🇳🇴 559 338 31ms 9 Feb 2023 828th ovs-code 🇩🇪 559 403 35ms 6 Feb 2024 829th MeWhenI 🇻🇦 559 472 1ms 25 Dec 2023 830th fpesce 559 532 290ms 18 Mar 2022 831st deancureton 559 552 440ms 24 Mar 2024 832nd toubsen 🇩🇪 558 487 4ms 21 Oct 2024 833rd SeeminglyScience 557 332 284ms 6 Jun 2020 834th MahlerFive 🇨🇦 557 534 293ms 22 Apr 2020 835th PPKFS 557 568 127ms 8 Dec 2022 836th toombs-caeman 556 340 10ms 2 Mar 2020 837th GinjaNinja32 556 535 300ms 16 Apr 2020 837th janbehrens 🇩🇪 556 535 300ms 20 Jun 2021 837th Shanethegamer 🇺🇸 556 535 297ms 31 Oct 2024 840th mohssenfathi 556 549 642ms 18 Jan 2020 841st HumanEquivalentUnit 556 564 1,365ms 12 Jan 2022 842nd Joe0 555 556 401ms 22 Apr 2020 843rd mokymok 🇺🇸 555 1,045 12ms 7 Oct 2021 844th stackofbears 554 407 34ms 27 Dec 2023 845th stefangimmillaro 554 489 111ms 28 Nov 2022 846th danieldooley 554 537 305ms 21 Apr 2020 847th aneurin-h 554 557 426ms 18 Oct 2022 848th suzhaoqi 553 342 10ms 21 Aug 2024 849th BlankSpruce 553 466 439ms 27 Nov 2024 850th HumanoidCPU 553 479 303ms 14 Mar 2024 850th neel11235813 553 479 308ms 16 Mar 2024 850th snoozingnewt 🇨🇦 553 479 303ms 30 Apr 2024 850th dokutan 553 479 312ms 23 Sep 2024 854th BlankSpruce 552 439 1ms 11 Jun 2025 855th pixelcat-gh 552 492 4ms 29 Nov 2023 856th dokutan 552 812 2ms 15 Oct 2024 857th KrausRaus 🇺🇸 551 479 1ms 23 Oct 2023 858th Brayn7 551 493 4ms 27 May 2021 858th Re-Adventures 🇮🇳 551 493 5ms 7 Jul 2023 860th Yewzir 🇧🇪 551 560 377ms 2 Oct 2025 861st Shanethegamer 🇺🇸 550 494 5ms 2 Jul 2023 862nd b97tsk 550 541 282ms 27 Apr 2020 863rd wazawoo 550 555 728ms 23 Nov 2020 864th aioobe 550 561 429ms 22 Apr 2020 864th SubsTheTechnomancer 550 561 470ms 1 Mar 2023 864th neel11235813 550 561 436ms 26 Mar 2024 867th cryptoriddlerUIO 550 570 1,479ms 24 Feb 2025 868th VegaQ8 549 495 5ms 8 Mar 2024 869th CheeseCake628 🇳🇴 548 338 525ms 17 Jan 2024 870th jerrandolph 548 543 315ms 21 Oct 2023 871st rowechenzhong 548 563 447ms 2 Dec 2021 872nd alexhuntley 547 372 6ms 11 Apr 2021 873rd Ripick 547 484 310ms 15 Jul 2024 874th msbranicky 547 544 304ms 31 Aug 2023 875th Jacob385 547 564 377ms 28 Oct 2025 876th Shanethegamer 🇺🇸 546 472 530ms 31 Oct 2024 877th GolfingSuccess 🇬🇷 546 483 1ms 29 Jan 2024 878th MJKWoolnough 546 545 283ms 10 Aug 2022 879th AaronKreipe 546 559 110ms 30 Jan 2020 880th boxjelly 545 566 422ms 24 Feb 2021 First Prev 801–880 of 4,056 Next Last
