The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 12 hours. Why not try and solve them ahead of time?
Number Spiral 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 721st madex 🇩🇪 471 213 46ms 11 hours ago 722nd janbehrens 🇩🇪 470 130 1,727ms 23 Feb 2022 723rd OllieBoyne 🇬🇧 469 134 10ms 14 Apr 2022 724th arctouch-cristiannevianna 467 218 440ms 4 Mar 2024 725th stefangimmillaro 466 135 14ms 10 Nov 2023 725th RaBa21 🇭🇺 466 135 10ms 18 Jul 2025 725th Lv0Sys 🇵🇱 466 135 14ms 27 Feb 2026 728th CaedenHarper 🇨🇦 466 164 82ms 11 Aug 2025 729th violeta-desantis 466 192 1ms 27 Apr 2024 730th jerrandolph 465 277 280ms 20 Oct 2023 731st razetime 464 65 2ms 26 Jan 2022 731st Shanethegamer 🇺🇸 464 65 2ms 20 May 2022 731st bwenstar 464 65 2ms 11 Aug 2022 731st trist224 🇫🇷 464 65 2ms 28 Nov 2022 731st rucin93 🇵🇱 464 65 2ms 3 May 2023 731st snoozingnewt 🇨🇦 464 65 2ms 7 Sep 2023 731st neel11235813 464 65 2ms 20 Nov 2023 731st FortuiteMan 🇫🇷 464 65 2ms 10 Oct 2024 731st LostSyntax21 🇬🇧 464 65 2ms 19 Jan 2025 731st CornerMercury 🇬🇧 464 65 2ms 28 Jan 2026 741st dokutan 463 217 38ms 4 Oct 2024 742nd quimey 462 136 11ms 12 Jun 2023 742nd cingulataluke 462 136 9ms 26 Aug 2023 744th msbranicky 462 212 2ms 3 Oct 2023 745th shinh 461 116 34ms 25 Jun 2022 746th dokutan 461 186 2ms 1 Apr 2024 747th bac0id 461 241 69ms 23 Feb 2024 748th Shanethegamer 🇺🇸 460 50 32ms 25 Jan 2022 748th scpchicken 🇵🇼 460 50 33ms 13 Mar 2022 748th yzhs 🇩🇪 460 50 32ms 6 Jun 2022 748th neel11235813 460 50 33ms 12 Feb 2023 752nd GolfingSuccess 🇬🇷 460 161 4ms 16 Aug 2024 753rd thisishowmymindworks 🇳🇴 460 176 10ms 2 Jul 2024 754th KatieLG 🇬🇧 460 327 7ms 12 Mar 2023 754th msbranicky 460 327 6ms 15 Sep 2023 756th Shanethegamer 🇺🇸 460 341 1,433ms 13 Jan 2025 756th KatieLG 🇬🇧 460 341 1,449ms 13 Jan 2025 756th HumanoidCPU 460 341 1,419ms 13 Jan 2025 756th dokutan 460 341 1,418ms 13 Jan 2025 756th CaedenHarper 🇨🇦 460 341 1,411ms 25 Jan 2025 756th MeWhenI 🇻🇦 460 341 1,445ms 10 Feb 2025 762nd retrohun 458 184 20ms 30 Jan 2022 763rd JunkIce 456 138 17ms 23 Jan 2025 763rd dokutan 456 138 17ms 27 Dec 2025 765th frankgraziano 454 203 6ms 8 Feb 2026 766th hamhub7 450 226 374ms 12 Aug 2022 767th dokutan 450 245 124ms 6 Nov 2024 768th CatsAreFluffy 450 247 86ms 12 Feb 2023 769th SniperSmiley 🇺🇸 449 140 12ms 29 Aug 2023 770th MeWhenI 🇻🇦 449 158 3ms 16 Apr 2023 771st HumanoidCPU 449 170 69ms 28 Apr 2024 772nd Bonjour27891 🇻🇳 446 141 21ms 15 Jul 2022 773rd Shanethegamer 🇺🇸 446 307 4ms 7 Feb 2026 773rd CaedenHarper 🇨🇦 446 307 2ms 10 days ago 775th HumanoidCPU 445 308 2ms 1 Jan 2026 775th KatieLG 🇬🇧 445 308 2ms 21 Feb 2026 777th TobyBoyne 🇬🇧 443 142 9ms 29 Jan 2022 777th Grrisly 443 142 17ms 25 Mar 2024 777th CutSandstone 443 142 10ms 5 Jul 2024 780th dokutan 442 137 403ms 14 Feb 2026 781st DaCuteRaccoon 441 256 464ms 15 May 2022 782nd MeWhenI 🇻🇦 440 90 38ms 24 Aug 2022 783rd Andrey-Plotnikov 440 184 9ms 27 Sep 2025 783rd snoozingnewt 🇨🇦 440 184 12ms 5 Oct 2025 785th JunkIce 439 138 433ms 23 Jan 2025 786th Msleizak 🇫🇷 439 555 11ms 4 Nov 2022 787th HumanoidCPU 438 185 12ms 26 Apr 2024 788th PickausernamePi 437 144 10ms 23 Dec 2022 788th Just4FunCoder 437 144 10ms 24 Sep 2025 790th taind772 437 252 182ms 27 Jan 2022 791st olleicua 🇺🇸 436 186 10ms 2 Feb 2024 792nd nstearns96 🇬🇧 431 146 9ms 15 Jul 2024 792nd Pyroan 431 146 10ms 20 Mar 2025 794th MeWhenI 🇻🇦 431 176 1,099ms 15 Sep 2025 795th tri1212 🇻🇳 428 147 19ms 5 Jul 2024 796th JRaspass 🇬🇧 427 311 37ms 13 Jun 2022 796th MeWhenI 🇻🇦 427 311 36ms 14 Jun 2022 796th CaedenHarper 🇨🇦 427 311 34ms 22 Jan 2025 799th jhpaques 🇫🇷 425 148 10ms 30 Jul 2022 800th dokutan 425 207 38ms 29 Oct 2024 First Prev 721–800 of 1,809 Next Last