The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. Why not try and solve them ahead of time?
Rule 110 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 561st Shanethegamer 🇺🇸 609 118 10ms 21 Apr 2023 562nd Frowny 609 129 148ms 5 Dec 2018 563rd abailey2020 🇺🇸 609 241 7ms 18 Apr 2020 564th Natanaelel 🇸🇪 608 94 1,317ms 6 Aug 2023 565th lionbryce 608 170 4ms 8 Aug 2024 566th marcin7Cd 607 168 114ms 8 Feb 2021 567th rambox11 606 116 11ms 6 Dec 2019 567th coreynash 606 116 11ms 19 Feb 2024 569th HumanoidCPU 605 92 415ms 17 Feb 2025 570th firegene 🇮🇪 603 96 11ms 21 days ago 571st SirBogman 🇺🇸 603 363 18ms 23 Nov 2022 572nd lynn 602 128 6ms 21 Mar 2022 573rd PatrickStephansen 🇿🇦 601 117 12ms 8 Mar 2021 574th DialFrost 🇸🇬 601 177 405ms 19 Nov 2025 575th orthoplex 🇨🇽 600 66 33ms 27 Feb 2020 576th inventshah 598 82 8ms 11 Sep 2022 577th yzhs 🇩🇪 597 97 18ms 25 Oct 2020 577th wh3n3v3r 🇨🇿 597 97 18ms 20 Nov 2024 577th JunkIce 597 97 18ms 24 Jan 2025 577th ryyyn 🇺🇸 597 97 15ms 5 Nov 2025 581st MateuszPietrzak 🇵🇱 595 160 444ms 11 Jan 2024 582nd Shanethegamer 🇺🇸 595 162 137ms 27 Feb 2023 582nd klixel 🇨🇦 595 162 132ms 10 May 2023 584th primo-ppcg 🇹🇭 594 179 436ms 14 Jul 2020 585th retrohun 593 121 5ms 12 Nov 2022 586th MeWhenI 🇻🇦 593 179 4ms 24 Jul 2023 587th qpwoeirut 591 98 11ms 11 Aug 2025 588th omurakazuaki 🇯🇵 591 119 10ms 15 Mar 2021 588th alexsave 591 119 10ms 4 Nov 2025 590th janAkali 🇷🇺 590 175 364ms 16 Nov 2025 591st tatzyr 🇯🇵 589 92 69ms 10 Dec 2024 591st denkyuu1 589 92 45ms 24 days ago 593rd Shanethegamer 🇺🇸 589 97 1,307ms 27 Feb 2023 594th tsunderu 🇯🇵 588 131 6ms 25 Aug 2021 594th Mandrzejy 🇵🇱 588 131 6ms 27 Feb 2024 596th Shanethegamer 🇺🇸 587 63 6ms 6 Feb 2022 597th o0lit3 🇺🇸 586 72 11ms 3 Oct 2020 598th MeWhenI 🇻🇦 586 208 106ms 7 Jun 2023 599th roguh 🇬🇹 585 99 12ms 22 Feb 2024 600th proton 🇩🇪 583 93 44ms 10 Jun 2020 600th razetime 583 93 40ms 25 Jan 2021 600th olivermrose 🇺🇸 583 93 41ms 24 Oct 2021 600th scpchicken 🇵🇼 583 93 42ms 22 Apr 2023 604th anter69 🇭🇺 583 98 1,290ms 24 Feb 2023 605th UnderKoen 🇳🇱 582 271 35ms 20 Jan 2025 606th thisishowmymindworks 🇳🇴 581 121 12ms 15 Aug 2020 606th XenThe 🇬🇧 581 121 11ms 1 Jul 2025 608th Shanethegamer 🇺🇸 581 223 25ms 25 Mar 2022 609th Indivicivet 580 133 6ms 16 Mar 2021 610th Shanethegamer 🇺🇸 578 136 134ms 20 May 2022 611th janbehrens 🇩🇪 578 184 460ms 15 Nov 2022 612th MeWhenI 🇻🇦 577 156 42ms 2 Jun 2024 613th jbt 576 122 12ms 26 Dec 2023 614th TimCurwick 🇺🇸 575 109 268ms 30 Jul 2020 615th JunkIce 574 97 454ms 24 Jan 2025 616th SirBogman 🇺🇸 574 137 181ms 27 Nov 2021 617th RockOfStone 574 180 3ms 10 Mar 2024 618th abailey2020 🇺🇸 573 101 11ms 12 Dec 2020 618th marcin7Cd 573 101 19ms 16 Dec 2020 618th fgrosshans 🇫🇷 573 101 19ms 22 Jul 2024 618th AstroOrbis 573 101 10ms 11 Feb 2026 622nd alexkunin 572 123 10ms 3 Jul 2019 623rd MeWhenI 🇻🇦 570 126 11ms 3 Jul 2023 624th cmayer777 570 167 60ms 21 Oct 2022 625th ian-h-chamberlain 🇺🇸 570 169 128ms 8 Oct 2020 626th edsrzf 🇳🇿 570 176 1,343ms 29 Apr 2025 627th Alex-x90 🇺🇸 570 222 288ms 19 Sep 2024 628th leon-w 568 102 12ms 4 Jan 2019 629th BBoehm 🇩🇪 567 124 14ms 10 Nov 2020 630th emgordon154 567 174 10ms 10 days ago 631st iczelia 🇩🇪 566 139 141ms 19 Oct 2025 632nd bac0id 565 140 407ms 4 Jul 2024 633rd funnsam 🇭🇰 564 171 138ms 12 Aug 2024 634th galloj 🇨🇿 562 103 11ms 24 Jan 2021 634th luuumine 🇫🇷 562 103 11ms 17 Oct 2025 636th guliyevemil1 🇦🇿 562 225 293ms 16 Apr 2020 637th MeWhenI 🇻🇦 561 141 406ms 19 Jun 2025 638th janbehrens 🇩🇪 561 158 472ms 15 Nov 2022 639th msbranicky 561 165 9ms 3 Oct 2024 640th msbranicky 558 227 299ms 30 Aug 2023 First Prev 561–640 of 1,659 Next Last