The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 34 hours. Why not try and solve them ahead of time?
Medal Tally 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 240th saito-ta 🇯🇵 796 156 2ms 8 Jun 2023 240th snoozingnewt 🇨🇦 796 156 11ms 20 Feb 2026 240th Flekay 🇩🇪 796 156 11ms 15 days ago 244th lynn 796 217 194ms 11 Jul 2024 245th GrayJoKing 🇦🇺 795 200 20ms 23 days ago 246th SirBogman 🇺🇸 794 130 743ms 16 Jan 2024 246th xsot 🇸🇬 794 130 456ms 7 Apr 2024 248th Shanethegamer 🇺🇸 794 172 429ms 7 Jun 2023 248th namelessiw 794 172 420ms 9 Apr 2025 250th nwellnhof 🇩🇪 793 110 14ms 19 Jun 2023 251st DialFrost 🇸🇬 793 117 1,319ms 3 Sep 2025 252nd MeWhenI 🇻🇦 793 213 665ms 7 Nov 2025 253rd inventshah 791 157 11ms 23 Sep 2023 254th MeWhenI 🇻🇦 791 197 133ms 12 Aug 2023 255th revlayle 🇺🇸 790 173 427ms 6 Jun 2023 256th Shanethegamer 🇺🇸 788 214 295ms 6 Jun 2023 257th sean-niemann 🇺🇸 787 154 160ms 6 Jan 2025 258th commandz0 🇺🇸 786 158 12ms 3 Jun 2023 259th amollberg 🇸🇪 781 159 13ms 4 Jan 2024 259th mathisfun271 781 159 30ms 9 Feb 2024 259th KatieLG 🇬🇧 781 159 12ms 7 Feb 2026 262nd tobeannouncd 781 195 152ms 5 Jan 2024 263rd sisyphus-ppcg 🇦🇺 779 99 39ms 1 Jun 2023 263rd GrayJoKing 🇦🇺 779 99 36ms 5 Jun 2023 265th voytxt 🇨🇿 779 153 13ms 3 Jun 2023 265th Yax42 🇫🇷 779 153 11ms 20 Jan 2026 267th Shanethegamer 🇺🇸 779 163 2,703ms 26 Oct 2024 268th GrayJoKing 🇦🇺 776 133 489ms 6 Mar 2024 269th jeff-at-tamer-dot-codes 🇺🇸 776 160 11ms 1 Jun 2023 270th JOrE20 774 154 11ms 5 Feb 2026 271st SirBogman 🇺🇸 773 114 368ms 30 Dec 2023 272nd tomtheisen 🇺🇸 772 177 422ms 6 Feb 2025 273rd AlephSquirrel 771 161 11ms 1 Jun 2023 274th kg583 🇺🇸 770 134 520ms 26 Jun 2024 275th MeWhenI 🇻🇦 769 155 12ms 3 Jul 2023 276th edsrzf 🇳🇿 769 174 102ms 22 Aug 2025 277th SirBogman 🇺🇸 766 89 33ms 8 Jun 2025 278th celiendonze 🇨🇭 762 163 18ms 6 Jun 2023 278th shelerr 762 163 85ms 21 Aug 2025 280th Shanethegamer 🇺🇸 761 179 18ms 31 Oct 2024 281st ritwinnarra 757 164 17ms 11 Jun 2023 281st CommandLeo 🇮🇹 757 164 10ms 18 Jan 2026 283rd BambooleanLogic 🇸🇪 754 158 11ms 27 Jun 2023 284th Alex-x90 🇺🇸 754 219 454ms 11 May 2024 285th emgordon154 753 137 725ms 22 Apr 2025 286th MeWhenI 🇻🇦 753 165 11ms 7 Dec 2023 287th duckyluuk 🇳🇱 751 169 2,871ms 26 Oct 2024 288th lynn 750 76 72ms 6 Jun 2023 289th DialFrost 🇸🇬 748 162 156ms 28 Oct 2024 290th MichalMarsalek 🇨🇿 748 166 12ms 1 Jun 2023 291st annaproxy 746 204 145ms 21 Aug 2023 292nd DialFrost 🇸🇬 745 173 5ms 21 Feb 2024 293rd inventshah 744 167 2ms 22 Jul 2024 294th edsrzf 🇳🇿 744 169 13ms 24 days ago 295th MeWhenI 🇻🇦 744 396 1,730ms 7 Nov 2025 296th GolfingSuccess 🇬🇷 743 139 501ms 20 Jan 2024 297th YAJUE114514 743 205 180ms 30 Jul 2025 298th MichalMarsalek 🇨🇿 742 200 452ms 12 Jun 2023 299th SirBogman 🇺🇸 741 104 36ms 14 Jan 2025 300th pardouin 🇫🇷 741 114 1,481ms 23 Sep 2025 301st dcgjb 741 119 346ms 3 May 2024 302nd lyphyser 740 161 14ms 3 Jun 2023 302nd alexsave 740 161 11ms 25 Dec 2025 304th fourth-bit 739 168 32ms 11 Jul 2023 304th StefanHabel 🇨🇦 739 168 13ms 10 days ago 306th DialFrost 🇸🇬 737 140 427ms 21 Feb 2024 307th MeWhenI 🇻🇦 737 227 3ms 12 Aug 2023 308th tayloia 🇬🇧 736 162 10ms 2 Jun 2023 308th itsh01 736 162 11ms 20 Jun 2023 308th targrik 736 162 11ms 22 Mar 2025 311th DialFrost 🇸🇬 731 163 10ms 4 Aug 2024 312th jared-hughes 731 170 11ms 18 Jun 2023 312th ahmetdemirag 🇨🇾 731 170 18ms 22 Feb 2025 314th Shanethegamer 🇺🇸 730 139 12ms 16 Dec 2023 315th snoozingnewt 🇨🇦 730 240 106ms 6 Dec 2025 316th scpchicken 🇵🇼 729 110 9ms 15 Nov 2023 317th edsrzf 🇳🇿 728 245 10ms 21 Feb 2025 318th LukeBridges 🇬🇧 727 164 10ms 28 Aug 2024 319th Shanethegamer 🇺🇸 727 176 1,047ms 22 Oct 2024 320th DialFrost 🇸🇬 727 182 468ms 10 Jul 2024 First Prev 241–320 of 620 Next Last