The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
United States in all languages in bytes. 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 Bytes Time Submitted 241st edsrzf 🇳🇿 865 136 101ms 28 Jun 2025 242nd edsrzf 🇳🇿 861 162 2ms 22 Aug 2025 243rd scpchicken 🇵🇼 860 73 100ms 2 Mar 2023 244th IISResetMe 859 95 286ms 7 Mar 2024 245th aliakseikalosha 858 117 11ms 28 Aug 2023 246th ovs-code 🇩🇪 858 119 2ms 16 Feb 2024 247th namelessiw 858 157 871ms 10 Oct 2025 248th canissimia 🇦🇶 857 279 2ms 23 Mar 2022 249th MostParsingVex 856 143 57ms 27 Jul 2024 250th primo-ppcg 🇹🇭 855 158 5ms 9 Jul 2022 251st MeWhenI 🇻🇦 855 199 366ms 9 Feb 2023 252nd emgordon154 855 294 1,741ms 16 Sep 2025 253rd SirBogman 🇺🇸 852 97 34ms 2 Sep 2022 254th DialFrost 🇸🇬 852 120 151ms 4 Aug 2024 255th SirBogman 🇺🇸 852 202 153ms 21 May 2020 256th GrayJoKing 🇦🇺 851 113 3ms 28 May 2021 257th janlelis 851 118 12ms 10 Feb 2021 258th stefangimmillaro 851 200 317ms 26 Sep 2023 258th MeWhenI 🇻🇦 851 200 7ms 29 Dec 2024 260th Jaykul 850 96 303ms 20 Apr 2024 261st Steffan153 🇫🇮 849 215 79ms 118 mins ago 262nd TFeld00 🇩🇰 847 124 15ms 5 Oct 2020 262nd sisyphus-ppcg 🇦🇺 847 124 15ms 5 Dec 2020 262nd argusdusty 🇺🇸 847 124 15ms 2 Jan 2021 262nd NewDefectus 🇮🇱 847 124 18ms 4 Dec 2021 262nd stefangimmillaro 847 124 16ms 8 Jul 2022 262nd Steffan153 🇫🇮 847 124 10ms 27 Nov 2022 262nd DialFrost 🇸🇬 847 124 19ms 20 Dec 2022 262nd sean-niemann 🇺🇸 847 124 10ms 5 Jan 2023 262nd neel11235813 847 124 15ms 15 Jan 2023 262nd scpchicken 🇵🇼 847 124 14ms 2 Mar 2023 262nd prplz 🇦🇺 847 124 14ms 28 May 2023 262nd lynn 847 124 19ms 11 Oct 2023 262nd pardouin 🇫🇷 847 124 15ms 3 Nov 2023 262nd Sp3000 🇦🇺 847 124 15ms 8 Nov 2023 262nd kg583 🇺🇸 847 124 15ms 1 Feb 2024 262nd m-tkach 🇺🇦 847 124 16ms 9 Feb 2024 262nd SirBogman 🇺🇸 847 124 15ms 12 Jun 2024 262nd PixelSoftwareStudios 🇺🇸 847 124 15ms 4 Jul 2024 262nd CaedenHarper 🇨🇦 847 124 16ms 25 Jul 2024 262nd b-illy 🇬🇧 847 124 15ms 7 Aug 2024 262nd ryyyn 🇺🇸 847 124 19ms 31 Jul 2025 262nd namelessiw 847 124 10ms 30 Aug 2025 262nd emgordon154 847 124 14ms 16 Sep 2025 262nd CommandLeo 🇮🇹 847 124 15ms 29 Dec 2025 262nd anter69 🇭🇺 847 124 16ms 1 Feb 2026 262nd Languag3 847 124 15ms 21 days ago 288th elisherer 🇮🇱 843 119 12ms 7 Oct 2021 289th Steffan153 🇫🇮 841 115 5ms 5 Mar 2024 290th edsrzf 🇳🇿 841 135 3ms 12 Nov 2025 291st NewDefectus 🇮🇱 840 83 3ms 4 Dec 2021 291st scpchicken 🇵🇼 840 83 3ms 2 Mar 2023 291st Steffan153 🇫🇮 840 83 3ms 5 Mar 2024 294th anter69 🇭🇺 840 95 1,578ms 1 Feb 2026 295th MeWhenI 🇻🇦 840 125 18ms 8 Jul 2022 295th GrayJoKing 🇦🇺 840 125 17ms 16 Jan 2024 295th duckyluuk 🇳🇱 840 125 16ms 7 Feb 2024 295th KatieLG 🇬🇧 840 125 15ms 1 Apr 2024 295th tperr 840 125 15ms 29 Sep 2024 295th alemelis 840 125 15ms 2 Oct 2024 301st GrayJoKing 🇦🇺 838 122 148ms 4 Aug 2024 302nd ovs-code 🇩🇪 838 146 488ms 27 Jul 2024 303rd AlephSquirrel 837 75 87ms 9 Sep 2024 304th KasperKivimaeki 🇫🇮 837 122 2ms 10 Sep 2025 305th lifthrasiir 🇰🇷 836 437 9ms 19 Dec 2024 306th DialFrost 🇸🇬 835 99 856ms 29 Aug 2025 306th CaedenHarper 🇨🇦 835 99 1,207ms 6 Sep 2025 308th AdrienHache 🇫🇷 834 129 457ms 28 Aug 2025 309th MeWhenI 🇻🇦 834 136 447ms 27 Jul 2024 310th Anonymousellama21 833 126 15ms 15 Jun 2022 310th inventshah 833 126 16ms 7 Jul 2022 310th Irratix 🇳🇱 833 126 19ms 21 Sep 2022 310th davitf 833 126 17ms 24 Jun 2023 310th 051 🇸🇬 833 126 15ms 10 Nov 2023 315th Steffan153 🇫🇮 832 167 30ms 12 Feb 2026 316th Posandu 830 121 12ms 6 Mar 2022 317th jared-hughes 828 91 33ms 11 Sep 2022 318th sean-niemann 🇺🇸 827 117 5ms 24 Sep 2025 319th commandz0 🇺🇸 827 127 15ms 11 Apr 2025 320th MeWhenI 🇻🇦 827 163 651ms 7 Nov 2025 First Prev 241–320 of 1,428 Next Last
