The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 33 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 razetime 464 65 2ms 26 Jan 2022 721st Shanethegamer 🇺🇸 464 65 2ms 20 May 2022 721st bwenstar 464 65 2ms 11 Aug 2022 721st trist224 🇫🇷 464 65 2ms 28 Nov 2022 721st rucin93 🇵🇱 464 65 2ms 3 May 2023 721st snoozingnewt 🇨🇦 464 65 2ms 7 Sep 2023 721st neel11235813 464 65 2ms 20 Nov 2023 721st FortuiteMan 🇫🇷 464 65 2ms 10 Oct 2024 721st LostSyntax21 🇬🇧 464 65 2ms 19 Jan 2025 721st CornerMercury 🇬🇧 464 65 2ms 28 Jan 2026 731st dokutan 463 217 38ms 4 Oct 2024 732nd quimey 462 136 11ms 12 Jun 2023 732nd cingulataluke 462 136 9ms 26 Aug 2023 734th msbranicky 462 212 2ms 3 Oct 2023 735th Shanethegamer 🇺🇸 462 341 1,433ms 13 Jan 2025 735th KatieLG 🇬🇧 462 341 1,456ms 13 Jan 2025 735th HumanoidCPU 462 341 1,419ms 13 Jan 2025 735th dokutan 462 341 1,418ms 13 Jan 2025 735th CaedenHarper 🇨🇦 462 341 1,433ms 25 Jan 2025 735th MeWhenI 🇻🇦 462 341 1,445ms 10 Feb 2025 741st shinh 461 116 34ms 25 Jun 2022 742nd dokutan 461 186 1ms 1 Apr 2024 743rd bac0id 461 241 72ms 23 Feb 2024 744th Shanethegamer 🇺🇸 460 50 32ms 25 Jan 2022 744th scpchicken 🇵🇼 460 50 33ms 13 Mar 2022 744th yzhs 🇩🇪 460 50 32ms 6 Jun 2022 744th neel11235813 460 50 33ms 12 Feb 2023 748th thisishowmymindworks 🇳🇴 460 176 11ms 2 Jul 2024 749th KatieLG 🇬🇧 460 327 7ms 12 Mar 2023 749th msbranicky 460 327 6ms 15 Sep 2023 751st HumanoidCPU 458 170 69ms 28 Apr 2024 752nd retrohun 458 184 20ms 30 Jan 2022 753rd JunkIce 456 138 17ms 23 Jan 2025 753rd dokutan 456 138 17ms 27 Dec 2025 755th frankgraziano 454 203 6ms 8 Feb 2026 756th Shanethegamer 🇺🇸 452 307 4ms 7 Feb 2026 756th CaedenHarper 🇨🇦 452 307 2ms 9 days ago 758th HumanoidCPU 451 308 2ms 1 Jan 2026 758th KatieLG 🇬🇧 451 308 2ms 21 Feb 2026 760th hamhub7 450 226 374ms 12 Aug 2022 761st CatsAreFluffy 450 247 92ms 12 Feb 2023 762nd SniperSmiley 🇺🇸 449 140 12ms 29 Aug 2023 763rd MeWhenI 🇻🇦 449 158 3ms 16 Apr 2023 764th dokutan 449 245 127ms 6 Nov 2024 765th dokutan 448 195 4ms 19 Aug 2024 766th Bonjour27891 🇻🇳 446 141 21ms 15 Jul 2022 767th TobyBoyne 🇬🇧 443 142 9ms 29 Jan 2022 767th Grrisly 443 142 17ms 25 Mar 2024 767th CutSandstone 443 142 10ms 5 Jul 2024 770th dokutan 442 137 403ms 14 Feb 2026 771st DaCuteRaccoon 441 256 464ms 15 May 2022 772nd MeWhenI 🇻🇦 440 90 38ms 24 Aug 2022 773rd Andrey-Plotnikov 440 184 11ms 27 Sep 2025 773rd snoozingnewt 🇨🇦 440 184 14ms 5 Oct 2025 775th JunkIce 439 138 433ms 23 Jan 2025 776th Msleizak 🇫🇷 439 555 11ms 4 Nov 2022 777th HumanoidCPU 438 185 14ms 26 Apr 2024 778th PickausernamePi 437 144 10ms 23 Dec 2022 778th Just4FunCoder 437 144 10ms 24 Sep 2025 780th taind772 437 252 184ms 27 Jan 2022 781st olleicua 🇺🇸 436 186 10ms 2 Feb 2024 782nd nstearns96 🇬🇧 431 146 9ms 15 Jul 2024 782nd Pyroan 431 146 10ms 20 Mar 2025 784th MeWhenI 🇻🇦 431 176 1,022ms 15 Sep 2025 785th madex 🇩🇪 429 234 40ms 2 hours ago 786th tri1212 🇻🇳 428 147 19ms 5 Jul 2024 787th JRaspass 🇬🇧 427 311 37ms 13 Jun 2022 787th MeWhenI 🇻🇦 427 311 36ms 14 Jun 2022 787th CaedenHarper 🇨🇦 427 311 34ms 22 Jan 2025 790th jhpaques 🇫🇷 425 148 10ms 30 Jul 2022 791st dokutan 425 207 38ms 29 Oct 2024 792nd KatieLG-Transpiler 🇬🇧 425 312 35ms 23 Jun 2022 792nd KatieLG 🇬🇧 425 312 36ms 30 Sep 2024 794th dokutan 424 144 253ms 9 Apr 2024 795th eranws 424 191 10ms 2 Sep 2023 796th BlankSpruce 422 149 10ms 15 Aug 2024 797th dokutan 422 192 11ms 27 Apr 2025 798th Msleizak 🇫🇷 422 357 6ms 26 Apr 2023 799th h3ra993huskp 🇯🇵 421 276 467ms 30 Nov 2025 800th guilhem-roy 🇫🇷 419 150 10ms 22 Feb 2022 First Prev 721–800 of 1,790 Next Last