The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
ROT13 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 241st JayXon 🇺🇸 895 114 157ms 3 May 2025 241st acotis 895 114 166ms 21 Sep 2025 241st kumavale 895 114 168ms 24 Nov 2025 244th Steffan153 🇫🇮 894 60 2,700ms 13 hours ago 244th JayXon 🇺🇸 894 60 2,590ms 12 hours ago 246th helbling 🇨🇭 893 73 10ms 4 Jan 2025 247th nwellnhof 🇩🇪 893 80 388ms 27 Jul 2025 248th JayXon 🇺🇸 893 94 391ms 1 Oct 2025 249th JayXon 🇺🇸 892 53 277ms 10 Jan 2025 250th canissimia 🇦🇶 892 84 166ms 5 Jan 2025 250th ovs-code 🇩🇪 892 84 167ms 5 Jan 2025 250th DialFrost 🇸🇬 892 84 175ms 5 Jan 2025 250th Steffan153 🇫🇮 892 84 173ms 18 hours ago 254th nwellnhof 🇩🇪 892 94 438ms 28 Jul 2025 255th emplv 🇱🇻 890 98 12ms 6 Jan 2025 255th rucin93 🇵🇱 890 98 17ms 6 Jan 2025 255th sean-niemann 🇺🇸 890 98 11ms 5 Feb 2025 258th pardouin 🇫🇷 889 62 450ms 5 Jan 2025 258th GolfingSuccess 🇬🇷 889 62 376ms 24 Jan 2025 260th nwellnhof 🇩🇪 888 123 294ms 28 Jul 2025 260th JayXon 🇺🇸 888 123 301ms 28 Jul 2025 260th Steffan153 🇫🇮 888 123 284ms 14 hours ago 263rd JayXon 🇺🇸 887 95 3ms 9 Jan 2025 263rd edsrzf 🇳🇿 887 95 2ms 9 Jan 2025 265th ovs-code 🇩🇪 886 42 5ms 5 Jan 2025 265th TheLastZombie 886 42 5ms 10 Jan 2025 265th blaztoma 🇱🇹 886 42 5ms 21 Sep 2025 268th pardouin 🇫🇷 885 57 1,239ms 28 Jul 2025 268th Steffan153 🇫🇮 885 57 1,276ms 12 hours ago 270th nwellnhof 🇩🇪 884 95 484ms 25 Sep 2025 271st Steffan153 🇫🇮 882 51 8ms 13 hours ago 272nd SirBogman 🇺🇸 881 24 2ms 9 Jan 2025 273rd ovs-code 🇩🇪 881 52 76ms 3 Jan 2025 273rd sean-niemann 🇺🇸 881 52 79ms 15 Feb 2026 273rd JayXon 🇺🇸 881 52 74ms 16 Feb 2026 273rd Steffan153 🇫🇮 881 52 75ms 16 Feb 2026 277th MeWhenI 🇻🇦 881 85 4ms 4 Jan 2025 277th sisyphus-ppcg 🇦🇺 881 85 4ms 5 Jan 2025 277th retrohun 881 85 4ms 5 Jan 2025 277th saito-ta 🇯🇵 881 85 4ms 12 Jan 2025 277th nwellnhof 🇩🇪 881 85 4ms 23 Jul 2025 277th jared-hughes 881 85 184ms 22 Sep 2025 283rd vlpx 🇫🇮 881 99 11ms 6 Jan 2025 284th kurkale6ka 880 74 12ms 15 Dec 2025 285th ovs-code 🇩🇪 880 118 134ms 5 Jan 2025 285th lynn 880 118 136ms 6 Jan 2025 285th xnor-gate 880 118 128ms 6 Jan 2025 285th Sakisan 🇧🇪 880 118 129ms 6 Jun 2025 285th edsrzf 🇳🇿 880 118 150ms 21 Dec 2025 285th Steffan153 🇫🇮 880 118 138ms 15 hours ago 291st ovs-code 🇩🇪 876 54 300ms 15 Jul 2025 292nd sean-niemann 🇺🇸 875 63 358ms 15 Feb 2026 293rd JayXon 🇺🇸 875 74 143ms 28 Jul 2025 294th Steffan153 🇫🇮 875 81 471ms 15 Feb 2026 294th JayXon 🇺🇸 875 81 444ms 15 Feb 2026 296th KasperKivimaeki 🇫🇮 873 96 441ms 4 Jan 2025 297th ovs-code 🇩🇪 872 100 11ms 7 Jan 2025 298th lynn 872 117 169ms 14 Nov 2025 299th stefangimmillaro 871 38 34ms 31 Dec 2024 299th Natanaelel 🇸🇪 871 38 36ms 3 Jan 2025 299th edsrzf 🇳🇿 871 38 34ms 5 Jan 2025 299th Shanethegamer 🇺🇸 871 38 36ms 5 Jan 2025 299th anter69 🇭🇺 871 38 33ms 6 Jan 2025 299th SirBogman 🇺🇸 871 38 34ms 15 Jan 2025 299th blaztoma 🇱🇹 871 38 42ms 21 Sep 2025 299th snoozingnewt 🇨🇦 871 38 34ms 15 Oct 2025 299th denkyuu1 871 38 33ms 31 Jan 2026 299th D-MOVE 🇵🇭 871 38 34ms 3 Feb 2026 309th andrewl64 869 75 11ms 25 Sep 2025 310th IISResetMe 866 57 299ms 7 Apr 2025 311th error256 865 100 27ms 10 May 2025 312th ovs-code 🇩🇪 864 82 450ms 5 Jan 2025 312th sean-niemann 🇺🇸 864 82 461ms 15 Feb 2026 314th ovs-code 🇩🇪 864 97 457ms 5 Jan 2025 315th MeWhenI 🇻🇦 864 101 12ms 26 Feb 2025 316th JayXon 🇺🇸 863 84 165ms 16 Feb 2026 317th DialFrost 🇸🇬 862 35 2ms 31 Dec 2024 317th error256 862 35 2ms 13 Jan 2025 317th Natanaelel 🇸🇪 862 35 3ms 14 Jan 2025 317th nwellnhof 🇩🇪 862 35 2ms 14 Jan 2025 First Prev 241–320 of 1,059 Next Last