The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 24 hours. Why not try and solve them ahead of time?
Arrows 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 241st Shanethegamer 🇺🇸 811 93 2,049ms 27 Aug 2021 241st stefangimmillaro 811 93 2,034ms 30 Jul 2022 241st MeWhenI 🇻🇦 811 93 1,929ms 13 Nov 2022 244th inventshah 811 100 2ms 25 Mar 2025 245th adyache 🇺🇸 811 127 7ms 5 Jun 2023 245th MeWhenI 🇻🇦 811 127 10ms 29 Dec 2024 247th MeWhenI 🇻🇦 811 137 146ms 25 Dec 2022 248th MeWhenI 🇻🇦 810 125 540ms 4 Mar 2022 249th JOrE20 809 101 14ms 21 Feb 2026 250th MeWhenI 🇻🇦 809 121 9ms 9 May 2024 251st sean-niemann 🇺🇸 809 150 4ms 8 Oct 2024 252nd nwellnhof 🇩🇪 808 73 4ms 30 Nov 2022 253rd inventshah 808 126 62ms 20 Jul 2023 254th duckyluuk 🇳🇱 807 82 527ms 29 Aug 2024 255th Shanethegamer 🇺🇸 807 150 384ms 23 Jun 2022 256th jared-hughes 806 94 11ms 22 Apr 2022 257th MeWhenI 🇻🇦 805 304 1,919ms 28 Mar 2025 258th kg583 🇺🇸 803 90 33ms 22 Jan 2026 259th MeWhenI 🇻🇦 803 99 7ms 28 May 2023 260th ovs-code 🇩🇪 803 101 2ms 4 May 2022 260th Steffan153 🇫🇮 803 101 2ms 18 Jul 2024 260th KasperKivimaeki 🇫🇮 803 101 2ms 2 Apr 2025 263rd Shanethegamer 🇺🇸 803 135 676ms 24 Sep 2025 264th MeWhenI 🇻🇦 802 111 487ms 8 Dec 2022 264th namelessiw 802 111 534ms 7 Jun 2024 266th primo-ppcg 🇹🇭 802 118 39ms 24 Jun 2022 267th jared-hughes 801 102 14ms 22 Apr 2022 268th GrayJoKing 🇦🇺 801 110 4ms 7 Sep 2024 269th snoozingnewt 🇨🇦 800 148 184ms 28 Feb 2026 270th MeWhenI 🇻🇦 800 154 41ms 29 Apr 2025 271st AlephSquirrel 800 160 6ms 21 Oct 2024 272nd jared-hughes 800 301 11ms 8 Jul 2024 273rd Shanethegamer 🇺🇸 799 152 28ms 7 Jul 2022 274th nwellnhof 🇩🇪 797 72 37ms 4 Jul 2023 275th Steffan153 🇫🇮 797 187 82ms 8 days ago 276th emgordon154 797 307 1,791ms 4 Sep 2025 277th lifthrasiir 🇰🇷 795 44 5ms 1 Dec 2024 278th edsrzf 🇳🇿 795 162 32ms 20 Feb 2026 279th neel11235813 794 91 12ms 3 Apr 2024 279th KatieLG 🇬🇧 794 91 19ms 2 Oct 2025 281st stefangimmillaro 794 140 133ms 30 Sep 2023 282nd tayloia 🇬🇧 793 103 15ms 5 Jun 2023 282nd prplz 🇦🇺 793 103 13ms 30 Jan 2024 282nd BalaM314 793 103 13ms 1 Mar 2025 282nd Lv0Sys 🇵🇱 793 103 13ms 28 Feb 2026 286th MeWhenI 🇻🇦 791 59 3ms 15 Dec 2021 287th MeWhenI 🇻🇦 791 102 156ms 3 days ago 288th MeWhenI 🇻🇦 791 137 823ms 7 Nov 2025 289th Shanethegamer 🇺🇸 791 187 161ms 20 Oct 2022 290th nwellnhof 🇩🇪 790 77 47ms 25 Sep 2021 291st primo-ppcg 🇹🇭 790 162 10ms 20 Jan 2023 291st edsrzf 🇳🇿 790 162 30ms 19 Feb 2026 293rd retrohun 789 96 17ms 31 Jan 2026 294th Shanethegamer 🇺🇸 789 128 425ms 28 Nov 2022 295th MeWhenI 🇻🇦 789 129 60ms 7 May 2023 295th ovs-code 🇩🇪 789 129 75ms 8 Jun 2024 297th sean-niemann 🇺🇸 788 141 276ms 27 Jan 2026 298th UnderKoen 🇳🇱 788 149 4ms 7 Mar 2023 299th Shanethegamer 🇺🇸 788 154 3ms 18 Jan 2023 300th sean-niemann 🇺🇸 787 103 2ms 8 Jul 2025 301st leon-w 785 92 11ms 24 Jul 2024 302nd voytxt 🇨🇿 785 104 13ms 4 Apr 2025 303rd stefangimmillaro 784 173 184ms 19 Oct 2023 304th MWI-polygolf 783 129 435ms 6 Dec 2023 305th Shanethegamer 🇺🇸 783 130 72ms 12 Jan 2022 305th m-tkach 🇺🇦 783 130 68ms 25 Aug 2023 307th Shanethegamer 🇺🇸 783 142 433ms 19 May 2023 308th MeWhenI 🇻🇦 783 175 51ms 4 Sep 2024 309th tobeannouncd 782 189 153ms 5 Jan 2024 310th tomtheisen 🇺🇸 781 114 515ms 10 Feb 2025 310th stefangimmillaro 781 114 501ms 10 Apr 2025 312th Shanethegamer 🇺🇸 781 117 160ms 29 Nov 2022 313th stefangimmillaro 780 139 853ms 6 Oct 2025 314th SirBogman 🇺🇸 780 158 44ms 3 Jun 2025 315th CLOStrophobic 🇮🇹 780 164 10ms 8 Mar 2025 316th kg583 🇺🇸 779 85 503ms 22 Jan 2026 317th Shanethegamer 🇺🇸 779 120 6ms 27 Sep 2024 318th Shanethegamer 🇺🇸 779 174 198ms 23 Sep 2022 319th kg583 🇺🇸 779 176 50ms 28 Oct 2025 320th sean-niemann 🇺🇸 776 95 2,313ms 14 Feb 2026 First Prev 241–320 of 1,317 Next Last