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 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 239th snoozingnewt 🇨🇦 796 156 11ms 20 Feb 2026 239th Flekay 🇩🇪 796 156 11ms 13 days ago 243rd lynn 796 217 194ms 11 Jul 2024 244th GrayJoKing 🇦🇺 795 200 20ms 21 days ago 245th SirBogman 🇺🇸 794 130 743ms 16 Jan 2024 245th xsot 🇸🇬 794 130 456ms 7 Apr 2024 247th Shanethegamer 🇺🇸 794 172 429ms 7 Jun 2023 247th namelessiw 794 172 420ms 9 Apr 2025 249th nwellnhof 🇩🇪 793 110 14ms 19 Jun 2023 250th DialFrost 🇸🇬 793 117 1,319ms 3 Sep 2025 251st MeWhenI 🇻🇦 793 213 665ms 7 Nov 2025 252nd inventshah 791 157 11ms 23 Sep 2023 253rd MeWhenI 🇻🇦 791 197 133ms 12 Aug 2023 254th revlayle 🇺🇸 790 173 427ms 6 Jun 2023 255th Shanethegamer 🇺🇸 788 214 295ms 6 Jun 2023 256th sean-niemann 🇺🇸 787 154 160ms 6 Jan 2025 257th commandz0 🇺🇸 786 158 12ms 3 Jun 2023 258th amollberg 🇸🇪 781 159 13ms 4 Jan 2024 258th mathisfun271 781 159 30ms 9 Feb 2024 258th KatieLG 🇬🇧 781 159 12ms 7 Feb 2026 261st tobeannouncd 781 195 152ms 5 Jan 2024 262nd sisyphus-ppcg 🇦🇺 779 99 39ms 1 Jun 2023 262nd GrayJoKing 🇦🇺 779 99 36ms 5 Jun 2023 264th voytxt 🇨🇿 779 153 13ms 3 Jun 2023 264th Yax42 🇫🇷 779 153 11ms 20 Jan 2026 266th Shanethegamer 🇺🇸 779 163 2,703ms 26 Oct 2024 267th GrayJoKing 🇦🇺 776 133 489ms 6 Mar 2024 268th jeff-at-tamer-dot-codes 🇺🇸 776 160 11ms 1 Jun 2023 269th JOrE20 774 154 11ms 5 Feb 2026 270th SirBogman 🇺🇸 773 114 368ms 30 Dec 2023 271st tomtheisen 🇺🇸 772 177 422ms 6 Feb 2025 272nd AlephSquirrel 771 161 11ms 1 Jun 2023 273rd kg583 🇺🇸 770 134 520ms 26 Jun 2024 274th MeWhenI 🇻🇦 769 155 12ms 3 Jul 2023 275th edsrzf 🇳🇿 769 174 102ms 22 Aug 2025 276th SirBogman 🇺🇸 766 89 33ms 8 Jun 2025 277th celiendonze 🇨🇭 762 163 18ms 6 Jun 2023 277th shelerr 762 163 85ms 21 Aug 2025 279th Shanethegamer 🇺🇸 761 179 18ms 31 Oct 2024 280th ritwinnarra 757 164 17ms 11 Jun 2023 280th CommandLeo 🇮🇹 757 164 10ms 18 Jan 2026 282nd BambooleanLogic 🇸🇪 754 158 11ms 27 Jun 2023 283rd Alex-x90 🇺🇸 754 219 454ms 11 May 2024 284th emgordon154 753 137 725ms 22 Apr 2025 285th MeWhenI 🇻🇦 753 165 11ms 7 Dec 2023 286th duckyluuk 🇳🇱 751 169 2,871ms 26 Oct 2024 287th lynn 750 76 72ms 6 Jun 2023 288th DialFrost 🇸🇬 748 162 156ms 28 Oct 2024 289th MichalMarsalek 🇨🇿 748 166 12ms 1 Jun 2023 290th annaproxy 746 204 145ms 21 Aug 2023 291st DialFrost 🇸🇬 745 173 5ms 21 Feb 2024 292nd inventshah 744 167 2ms 22 Jul 2024 293rd edsrzf 🇳🇿 744 169 13ms 21 days ago 294th MeWhenI 🇻🇦 744 396 1,730ms 7 Nov 2025 295th GolfingSuccess 🇬🇷 743 139 501ms 20 Jan 2024 296th YAJUE114514 743 205 180ms 30 Jul 2025 297th MichalMarsalek 🇨🇿 742 200 452ms 12 Jun 2023 298th SirBogman 🇺🇸 741 104 36ms 14 Jan 2025 299th pardouin 🇫🇷 741 114 1,481ms 23 Sep 2025 300th dcgjb 741 119 346ms 3 May 2024 301st lyphyser 740 161 14ms 3 Jun 2023 301st alexsave 740 161 11ms 25 Dec 2025 303rd fourth-bit 739 168 32ms 11 Jul 2023 303rd StefanHabel 🇨🇦 739 168 13ms 8 days ago 305th DialFrost 🇸🇬 737 140 427ms 21 Feb 2024 306th MeWhenI 🇻🇦 737 227 3ms 12 Aug 2023 307th tayloia 🇬🇧 736 162 10ms 2 Jun 2023 307th itsh01 736 162 11ms 20 Jun 2023 307th targrik 736 162 11ms 22 Mar 2025 310th DialFrost 🇸🇬 731 163 10ms 4 Aug 2024 311th jared-hughes 731 170 11ms 18 Jun 2023 311th ahmetdemirag 🇨🇾 731 170 18ms 22 Feb 2025 313th Shanethegamer 🇺🇸 730 139 12ms 16 Dec 2023 314th snoozingnewt 🇨🇦 730 240 106ms 6 Dec 2025 315th scpchicken 🇵🇼 729 110 9ms 15 Nov 2023 316th edsrzf 🇳🇿 728 245 10ms 21 Feb 2025 317th LukeBridges 🇬🇧 727 164 10ms 28 Aug 2024 318th Shanethegamer 🇺🇸 727 176 1,047ms 22 Oct 2024 319th DialFrost 🇸🇬 727 182 468ms 10 Jul 2024 320th annaproxy 723 189 413ms 12 Jun 2023 First Prev 241–320 of 619 Next Last