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 401st ovs-code 🇩🇪 835 66 433ms 3 Jan 2025 401st AlephSquirrel 835 66 463ms 5 Jan 2025 401st CaedenHarper 🇨🇦 835 66 422ms 19 Jan 2025 401st emgordon154 835 66 374ms 14 Apr 2025 401st fuzzylojik-golf 🇺🇸 835 66 437ms 7 Jul 2025 401st duckyluuk 🇳🇱 835 66 394ms 9 Jul 2025 401st b-illy 🇬🇧 835 66 497ms 13 Jul 2025 401st CornerMercury 🇬🇧 835 66 378ms 12 Oct 2025 401st Babafaba 835 66 446ms 30 Oct 2025 410th MeWhenI 🇻🇦 835 77 58ms 6 Jan 2025 411th pcrav0 835 78 11ms 29 Jan 2025 411th ehulinsky 🇺🇸 835 78 11ms 29 Mar 2025 413th saito-ta 🇯🇵 835 80 4ms 13 Jan 2025 413th GolfingSuccess 🇬🇷 835 80 2ms 24 days ago 415th JayXon 🇺🇸 835 93 119ms 8 Jan 2025 416th sean-niemann 🇺🇸 835 127 42ms 4 Jan 2025 417th GrayJoKing 🇦🇺 834 101 2ms 14 Jul 2025 418th m-tkach 🇺🇦 834 130 12ms 7 Jan 2025 419th MeWhenI 🇻🇦 833 41 19ms 5 Jan 2025 420th DialFrost 🇸🇬 833 55 74ms 1 Jan 2025 420th snoozingnewt 🇨🇦 833 55 74ms 11 Sep 2025 422nd Steffan153 🇫🇮 832 140 94ms 20 hours ago 423rd edsrzf 🇳🇿 831 111 11ms 27 days ago 424th frankgraziano 831 215 3,677ms 11 Aug 2025 425th GolfingSuccess 🇬🇷 830 224 1,721ms 11 Jan 2026 426th DialFrost 🇸🇬 829 46 685ms 15 Feb 2026 427th edsrzf 🇳🇿 829 89 8ms 14 Oct 2025 428th DialFrost 🇸🇬 828 40 35ms 1 Jan 2025 428th jmerle 🇳🇱 828 40 35ms 7 Jan 2025 428th Andriamanitra 🇫🇮 828 40 36ms 12 Jan 2025 428th frankgraziano 828 40 36ms 12 May 2025 428th Just4FunCoder 828 40 33ms 14 Sep 2025 428th albanian-laundromat 828 40 33ms 30 Oct 2025 434th iczelia 🇩🇪 827 45 4ms 21 Sep 2025 435th edsrzf 🇳🇿 827 61 1,312ms 20 Jul 2025 436th primo-ppcg 🇹🇭 827 216 3,737ms 13 Aug 2025 437th yhm138 825 79 10ms 16 Feb 2025 438th m-tkach 🇺🇦 825 81 2ms 7 Jan 2025 438th rhdqor213 825 81 2ms 9 Dec 2025 440th error256 825 122 25ms 8 Jan 2025 441st zacjl 824 105 15ms 8 Jan 2025 442nd kg583 🇺🇸 824 144 40ms 20 Dec 2025 443rd DialFrost 🇸🇬 823 67 476ms 1 Jan 2025 443rd m-tkach 🇺🇦 823 67 428ms 23 Jul 2025 443rd FEZfan 🇦🇺 823 67 428ms 1 Nov 2025 446th voytxt 🇨🇿 823 106 11ms 4 Jan 2025 446th targrik 823 106 11ms 4 Apr 2025 448th stefangimmillaro 822 87 412ms 14 Jan 2025 448th SirBogman 🇺🇸 822 87 428ms 23 Jan 2025 448th tomtheisen 🇺🇸 822 87 409ms 15 Feb 2025 448th namelessiw 822 87 394ms 24 Jul 2025 452nd m-tkach 🇺🇦 822 102 467ms 7 Jan 2025 453rd ovs-code 🇩🇪 820 79 179ms 17 Apr 2025 454th GrayJoKing 🇦🇺 818 96 35ms 25 Nov 2025 455th edsrzf 🇳🇿 818 145 44ms 20 Jul 2025 456th Natanaelel 🇸🇪 816 44 103ms 13 Jan 2025 457th kg583 🇺🇸 816 106 26ms 13 days ago 458th saito-ta 🇯🇵 815 26 56ms 12 Jan 2025 459th DialFrost 🇸🇬 815 87 440ms 1 Jan 2025 459th edsrzf 🇳🇿 815 87 482ms 2 Nov 2025 461st rucin93 🇵🇱 815 89 159ms 7 Dec 2025 461st sean-niemann 🇺🇸 815 89 164ms 7 Dec 2025 463rd JOrE20 815 107 13ms 26 days ago 464th saito-ta 🇯🇵 815 115 20ms 12 Jan 2025 465th GolfingSuccess 🇬🇷 813 26 3ms 20 Mar 2025 466th stefangimmillaro 813 62 1,282ms 4 Jan 2025 467th edsrzf 🇳🇿 812 66 2,660ms 2 Nov 2025 468th Shanethegamer 🇺🇸 811 68 386ms 2 Jan 2025 468th dokutan 811 68 397ms 6 Jan 2025 468th HumanoidCPU 811 68 408ms 7 Jan 2025 468th SirBogman 🇺🇸 811 68 545ms 15 Jan 2025 468th albanian-laundromat 811 68 407ms 4 Aug 2025 468th TheZwierzLF 🇵🇱 811 68 470ms 22 Nov 2025 468th Yewzir 🇧🇪 811 68 377ms 1 Dec 2025 468th snoozingnewt 🇨🇦 811 68 384ms 20 Feb 2026 476th stefangimmillaro 810 126 170ms 14 Jan 2025 477th SirBogman 🇺🇸 809 61 312ms 9 Jan 2025 478th stefangimmillaro 809 135 275ms 2 Jan 2025 479th aksyristos 808 41 36ms 7 Jan 2025 479th CornerMercury 🇬🇧 808 41 36ms 17 Jan 2025 First Prev 401–480 of 1,063 Next Last