The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Medal Tally 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 MeWhenI 🇻🇦 817 142 14ms 10 Jan 2025 162nd Shanethegamer 🇺🇸 817 143 168ms 24 May 2025 163rd GrayJoKing 🇦🇺 816 155 109ms 6 Jun 2023 164th edsrzf 🇳🇿 816 168 404ms 17 Aug 2025 165th Steffan153 🇫🇮 815 98 11ms 12 Feb 2026 166th lynn 815 211 35ms 16 Jul 2023 167th saito-ta 🇯🇵 814 144 2ms 8 Jun 2023 167th KasperKivimaeki 🇫🇮 814 144 2ms 15 Nov 2025 169th albanian-laundromat 813 191 3ms 7 Oct 2025 170th emplv 🇱🇻 812 199 319ms 20 Jun 2023 170th stefangimmillaro 812 199 298ms 5 May 2025 172nd edsrzf 🇳🇿 811 153 23ms 61 mins ago 173rd adyache 🇺🇸 809 127 11ms 25 Jul 2023 174th AdrienHache 🇫🇷 808 154 498ms 16 Dec 2025 175th GrayJoKing 🇦🇺 804 214 32ms 4 Jun 2023 176th nwellnhof 🇩🇪 802 89 9ms 21 May 2024 177th GrayJoKing 🇦🇺 802 97 404ms 23 Jul 2024 178th sean-niemann 🇺🇸 802 182 3ms 19 Nov 2025 179th Yewzir 🇧🇪 802 352 1,981ms 20 May 2024 180th SirBogman 🇺🇸 801 62 3ms 4 Jun 2023 181st edsrzf 🇳🇿 801 161 133ms 26 Jun 2025 182nd edsrzf 🇳🇿 801 218 49ms 12 mins ago 183rd ovs-code 🇩🇪 800 79 34ms 22 Feb 2025 184th SirBogman 🇺🇸 800 379 181ms 30 Dec 2023 185th Shanethegamer 🇺🇸 799 151 2,703ms 26 Oct 2024 186th sean-niemann 🇺🇸 798 100 12ms 13 Jan 2025 187th MeWhenI 🇻🇦 796 97 1,293ms 7 Jun 2023 188th GrayJoKing 🇦🇺 795 148 15ms 12 Jun 2023 189th sean-niemann 🇺🇸 795 207 655ms 24 Sep 2025 190th sean-niemann 🇺🇸 794 89 2ms 12 Aug 2023 191st lifthrasiir 🇰🇷 794 98 404ms 2 Dec 2024 192nd GrayJoKing 🇦🇺 794 143 14ms 2 Jun 2023 192nd ovs-code 🇩🇪 794 143 9ms 2 Jun 2023 194th sisyphus-ppcg 🇦🇺 793 90 4ms 1 Jun 2023 195th stefangimmillaro 793 181 129ms 12 Nov 2023 196th stefangimmillaro 791 203 279ms 12 Nov 2023 197th stefangimmillaro 788 158 422ms 10 Apr 2025 198th jared-hughes 788 289 14ms 6 Jul 2024 199th Irratix 🇳🇱 787 127 11ms 1 Jun 2023 200th ovs-code 🇩🇪 787 149 2ms 10 Jul 2024 201st snoozingnewt 🇨🇦 786 99 411ms 20 Feb 2026 202nd SirBogman 🇺🇸 785 100 391ms 18 May 2024 203rd CLOStrophobic 🇮🇹 785 158 28ms 7 Mar 2025 204th duckyluuk 🇳🇱 784 148 14ms 9 Jan 2025 205th annaproxy 784 150 15ms 15 Jun 2023 206th ovs-code 🇩🇪 783 114 153ms 29 May 2024 207th MeWhenI 🇻🇦 783 210 665ms 7 Nov 2025 208th GrayJoKing 🇦🇺 781 194 20ms 21 days ago 209th nwellnhof 🇩🇪 780 81 39ms 10 Jun 2023 210th Shanethegamer 🇺🇸 778 160 429ms 7 Jun 2023 210th namelessiw 778 160 420ms 9 Apr 2025 212th Shanethegamer 🇺🇸 778 180 148ms 1 Jun 2023 213th Shanethegamer 🇺🇸 776 64 3ms 5 Jun 2023 214th DialFrost 🇸🇬 776 159 5ms 8 Dec 2023 215th MeWhenI 🇻🇦 776 185 133ms 12 Aug 2023 216th ovs-code 🇩🇪 774 101 292ms 7 Jan 2024 217th ovs-code 🇩🇪 774 152 14ms 3 Jul 2024 218th saito-ta 🇯🇵 773 97 18ms 19 Jun 2023 219th revlayle 🇺🇸 773 161 427ms 6 Jun 2023 220th saito-ta 🇯🇵 772 57 68ms 6 Jun 2023 220th emgordon154 772 57 48ms 19 Oct 2025 222nd lynn 772 208 194ms 11 Jul 2024 223rd Shanethegamer 🇺🇸 771 82 36ms 6 Jun 2023 224th nwellnhof 🇩🇪 766 98 14ms 19 Jun 2023 225th tobeannouncd 766 183 152ms 5 Jan 2024 226th Shanethegamer 🇺🇸 765 211 295ms 6 Jun 2023 227th thisishowmymindworks 🇳🇴 757 132 14ms 27 Jun 2024 228th ndren 756 115 12ms 3 Aug 2025 229th albanian-laundromat 755 103 401ms 4 Aug 2025 230th dcgjb 755 104 402ms 3 May 2024 231st tomtheisen 🇺🇸 755 165 422ms 6 Feb 2025 232nd Alex-x90 🇺🇸 755 207 454ms 11 May 2024 233rd duckyluuk 🇳🇱 754 160 2,746ms 25 Oct 2024 234th stefangimmillaro 753 84 37ms 30 Mar 2024 234th MeWhenI 🇻🇦 753 84 38ms 27 Jul 2025 236th edsrzf 🇳🇿 753 168 102ms 22 Aug 2025 237th DialFrost 🇸🇬 751 114 1,319ms 3 Sep 2025 238th duckyluuk 🇳🇱 751 133 11ms 6 Jan 2026 238th Lv0Sys 🇵🇱 751 133 10ms 25 Feb 2026 240th Shanethegamer 🇺🇸 749 164 1,047ms 22 Oct 2024 First Prev 161–240 of 617 Next Last