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 161st edsrzf 🇳🇿 852 142 382ms 19 Feb 2026 162nd MeWhenI 🇻🇦 851 96 13ms 1 Mar 2022 162nd stefangimmillaro 851 96 12ms 24 Jul 2022 162nd Irratix 🇳🇱 851 96 13ms 8 Dec 2022 165th lynn 851 137 1,560ms 30 Nov 2021 166th m-tkach 🇺🇦 850 85 44ms 28 Sep 2021 167th primo-ppcg 🇹🇭 849 110 5ms 30 Aug 2023 168th GrayJoKing 🇦🇺 848 55 3ms 15 Dec 2022 169th Shanethegamer 🇺🇸 848 78 539ms 16 Jan 2024 170th canissimia 🇦🇶 848 170 5ms 4 Mar 2023 171st primo-ppcg 🇹🇭 847 89 1,907ms 18 Sep 2021 172nd GrayJoKing 🇦🇺 846 107 136ms 31 May 2022 173rd nwellnhof 🇩🇪 846 143 398ms 18 Dec 2022 174th emplv 🇱🇻 845 94 8ms 23 Aug 2021 175th sean-niemann 🇺🇸 845 112 43ms 18 Sep 2023 176th sean-niemann 🇺🇸 844 68 38ms 26 Jul 2024 176th anter69 🇭🇺 844 68 43ms 20 days ago 178th Shanethegamer 🇺🇸 844 120 508ms 14 Jul 2023 179th primo-ppcg 🇹🇭 844 146 42ms 11 Jun 2025 180th primo-ppcg 🇹🇭 843 144 32ms 4 Mar 2022 180th emplv 🇱🇻 843 144 26ms 30 Nov 2022 182nd Shanethegamer 🇺🇸 842 97 15ms 1 Apr 2022 182nd thisishowmymindworks 🇳🇴 842 97 13ms 25 Jun 2024 184th nwellnhof 🇩🇪 842 121 70ms 5 Dec 2022 185th nwellnhof 🇩🇪 840 74 270ms 4 Jul 2023 186th plcc0 840 86 33ms 31 Jan 2026 187th sean-niemann 🇺🇸 838 90 1,815ms 26 Jul 2024 188th JayXon 🇺🇸 838 184 2,391ms 14 Sep 2025 189th MWI-polygolf 837 111 2ms 6 Dec 2023 190th sean-niemann 🇺🇸 835 122 62ms 8 Jul 2025 191st ovs-code 🇩🇪 835 177 159ms 7 Jul 2024 192nd Waffle3z 834 98 15ms 25 Aug 2021 192nd itsh01 834 98 14ms 16 Nov 2021 194th primo-ppcg 🇹🇭 834 121 504ms 29 Nov 2022 194th sean-niemann 🇺🇸 834 121 398ms 18 Sep 2023 196th lynn 833 42 6ms 3 Jun 2022 197th sean-niemann 🇺🇸 833 101 3ms 7 Dec 2025 198th edsrzf 🇳🇿 833 142 196ms 19 Feb 2026 199th Shanethegamer 🇺🇸 832 69 39ms 27 Aug 2021 200th primo-ppcg 🇹🇭 832 107 483ms 21 Nov 2021 201st MeWhenI 🇻🇦 832 146 34ms 29 Nov 2022 202nd andersk 🇺🇸 832 163 183ms 1 Nov 2022 203rd primo-ppcg 🇹🇭 832 296 12ms 21 May 2025 204th m-tkach 🇺🇦 831 155 38ms 12 Jan 2024 205th fkantelberg 830 87 45ms 14 Jul 2023 206th Shanethegamer 🇺🇸 829 75 249ms 8 Feb 2023 207th prplz 🇦🇺 828 98 2ms 3 May 2022 208th Steffan153 🇫🇮 828 123 69ms 5 May 2024 209th sean-niemann 🇺🇸 828 131 863ms 24 Sep 2025 210th GrayJoKing 🇦🇺 827 104 100ms 9 Dec 2023 211th MeWhenI 🇻🇦 827 122 430ms 25 Dec 2022 212th rucin93 🇵🇱 825 99 13ms 9 Jun 2023 213th lynn 824 108 483ms 21 Nov 2021 213th sean-niemann 🇺🇸 824 108 534ms 9 Aug 2024 215th Shanethegamer 🇺🇸 824 297 1,895ms 11 Apr 2025 216th emplv 🇱🇻 823 111 149ms 6 Dec 2022 217th GrayJoKing 🇦🇺 823 115 48ms 7 Jul 2023 218th emplv 🇱🇻 823 147 388ms 18 Jan 2022 219th emgordon154 822 144 170ms 3 Dec 2025 220th TFeld00 🇩🇰 821 88 43ms 21 Apr 2022 220th CornerMercury 🇬🇧 821 88 14ms 21 Nov 2025 222nd canissimia 🇦🇶 821 326 10ms 24 Nov 2023 223rd anter69 🇭🇺 820 92 1,944ms 20 days ago 224th MeWhenI 🇻🇦 820 114 6ms 23 May 2023 225th MeWhenI 🇻🇦 820 148 3ms 12 Sep 2022 226th MeWhenI 🇻🇦 820 188 2,007ms 7 Nov 2025 227th MeWhenI 🇻🇦 818 76 248ms 28 Jan 2023 228th Elkfoot2 817 100 12ms 25 Jan 2026 229th MeWhenI 🇻🇦 817 103 2ms 25 Jul 2024 230th Shanethegamer 🇺🇸 817 109 482ms 26 Mar 2024 230th Steffan153 🇫🇮 817 109 465ms 9 Aug 2024 230th prplz 🇦🇺 817 109 484ms 23 Jan 2025 233rd Shanethegamer 🇺🇸 815 114 2ms 28 Nov 2022 233rd Waffle3z 815 114 3ms 14 Dec 2022 235th lynn 815 158 33ms 11 Jul 2023 235th Shanethegamer 🇺🇸 815 158 38ms 10 Feb 2026 237th GrayJoKing 🇦🇺 814 43 5ms 5 Jun 2025 238th lifthrasiir 🇰🇷 814 296 11ms 19 Dec 2024 239th keelimeguy 🇺🇸 812 89 40ms 12 Nov 2023 239th albanian-laundromat 812 89 13ms 24 Jun 2025 First Prev 161–240 of 1,317 Next Last