The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 15 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 321st voytxt 🇨🇿 743 211 1,446ms 26 Jan 2025 322nd CaedenHarper 🇨🇦 742 157 551ms 6 Oct 2025 323rd DialFrost 🇸🇬 741 146 1ms 17 Nov 2023 324th Alex-x90 🇺🇸 741 150 65ms 14 Nov 2022 324th inventshah 741 150 57ms 16 Nov 2022 326th sisyphus-ppcg 🇦🇺 740 85 10ms 26 Jan 2022 326th xnor-gate 740 85 10ms 27 Jan 2022 326th SirBogman 🇺🇸 740 85 10ms 20 Nov 2022 329th DialFrost 🇸🇬 740 151 111ms 2 Dec 2025 330th scpchicken 🇵🇼 739 96 3ms 14 Jun 2023 330th o0lit3 🇺🇸 739 96 3ms 15 Jun 2023 330th saito-ta 🇯🇵 739 96 3ms 4 Aug 2025 333rd Babafaba 738 82 438ms 28 Nov 2025 334th CaedenHarper 🇨🇦 738 138 402ms 19 Oct 2025 335th KrausRaus 🇺🇸 737 110 10ms 3 Jan 2023 336th ovs-code 🇩🇪 736 151 61ms 3 Jun 2024 337th nwellnhof 🇩🇪 735 98 303ms 18 Jun 2024 338th emgordon154 734 150 125ms 27 Feb 2025 339th JohandeRuiter 🇳🇱 733 122 1ms 25 Mar 2024 340th m-tkach 🇺🇦 732 139 366ms 27 Oct 2022 341st m-tkach 🇺🇦 732 152 62ms 27 Oct 2022 342nd ovs-code 🇩🇪 731 54 207ms 8 Jan 2024 343rd Artemis21 🇬🇧 731 86 10ms 10 Jan 2025 343rd plcc0 731 86 10ms 25 Mar 2025 345th w911 731 176 272ms 9 Oct 2024 346th CaedenHarper 🇨🇦 730 111 10ms 29 Aug 2025 347th Re-Adventures 🇮🇳 727 123 1ms 11 Feb 2022 348th JRaspass 🇬🇧 727 177 292ms 7 Feb 2024 349th MeWhenI 🇻🇦 726 165 3ms 1 Nov 2023 350th andersk 🇺🇸 724 152 128ms 30 Oct 2022 351st emgordon154 723 112 9ms 16 Nov 2024 352nd primo-ppcg 🇹🇭 723 159 15ms 16 Feb 2022 353rd MeWhenI 🇻🇦 722 139 42ms 4 Sep 2024 354th pandapawskat 721 124 1ms 29 Feb 2024 355th ovs-code 🇩🇪 719 95 146ms 20 Nov 2024 356th DialFrost 🇸🇬 719 162 389ms 24 Sep 2025 357th Yewzir 🇧🇪 718 157 454ms 21 Dec 2023 358th dmrichwa 🇺🇸 717 113 8ms 4 Oct 2022 359th AdrienHache 🇫🇷 717 142 428ms 18 Aug 2025 360th Yewzir 🇧🇪 715 88 10ms 27 Dec 2023 361st marshallward 🇺🇸 715 123 40ms 6 May 2025 362nd kallmi28 🇨🇿 715 125 1ms 9 Nov 2023 363rd MeWhenI 🇻🇦 713 342 10ms 1 Aug 2023 363rd janbehrens 🇩🇪 713 342 10ms 2 Aug 2023 363rd frankgraziano 713 342 10ms 6 Aug 2025 363rd JOrE20 713 342 10ms 16 Feb 2026 367th sisyphus-ppcg 🇦🇺 712 85 528ms 2 Sep 2024 368th primo-ppcg 🇹🇭 712 139 5ms 29 Jan 2023 369th jared-hughes 711 114 9ms 13 Feb 2023 370th stefangimmillaro 711 181 316ms 31 Aug 2023 371st scpchicken 🇵🇼 711 343 10ms 30 Jan 2022 371st KatieLG 🇬🇧 711 343 9ms 28 Sep 2024 371st BREMAUCY 🇫🇷 711 343 10ms 18 Feb 2025 374th Shanethegamer 🇺🇸 710 150 1,348ms 7 Mar 2023 375th dokutan 710 157 122ms 25 Jun 2024 376th SirBogman 🇺🇸 709 344 10ms 27 Mar 2022 377th Irratix 🇳🇱 708 157 438ms 15 Dec 2022 378th error256 707 89 10ms 10 Dec 2024 379th SirBogman 🇺🇸 706 102 299ms 27 Jan 2024 380th sean-niemann 🇺🇸 706 136 2,480ms 30 Oct 2024 381st verticallity 706 156 142ms 7 Apr 2022 382nd nwellnhof 🇩🇪 705 56 182ms 27 Jan 2022 383rd inventshah 705 139 2ms 19 Aug 2023 384th nwellnhof 🇩🇪 705 177 5ms 10 Jul 2022 385th error256 704 76 36ms 21 May 2025 386th primo-ppcg 🇹🇭 701 131 4ms 6 Aug 2023 387th edsrzf 🇳🇿 701 166 403ms 2 hours ago 388th Yewzir 🇧🇪 699 184 279ms 7 Feb 2024 389th ovs-code 🇩🇪 698 98 64ms 1 Oct 2023 390th itsh01 698 116 9ms 5 Sep 2022 391st emgordon154 696 138 2,527ms 12 Nov 2024 392nd Sakisan 🇧🇪 696 142 118ms 13 Apr 2022 393rd anter69 🇭🇺 695 77 34ms 12 Feb 2024 394th dokutan 695 160 59ms 1 Apr 2024 394th KasperKivimaeki 🇫🇮 695 160 68ms 27 Nov 2025 396th KatieLG-Transpiler 🇬🇧 695 351 10ms 4 Dec 2022 396th lynn 695 351 10ms 17 Oct 2023 398th m-tkach 🇺🇦 693 168 588ms 25 Sep 2025 399th Re-Adventures 🇮🇳 692 117 10ms 11 Feb 2022 400th btjones0 691 91 10ms 15 Jul 2022 First Prev 321–400 of 1,808 Next Last