The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 321st error256 865 100 27ms 10 May 2025 322nd ovs-code 🇩🇪 864 82 450ms 5 Jan 2025 322nd sean-niemann 🇺🇸 864 82 461ms 15 Feb 2026 324th ovs-code 🇩🇪 864 97 457ms 5 Jan 2025 325th MeWhenI 🇻🇦 864 101 12ms 26 Feb 2025 326th ovs-code 🇩🇪 863 54 300ms 15 Jul 2025 327th DialFrost 🇸🇬 862 35 2ms 31 Dec 2024 327th error256 862 35 2ms 13 Jan 2025 327th Natanaelel 🇸🇪 862 35 3ms 14 Jan 2025 327th nwellnhof 🇩🇪 862 35 2ms 14 Jan 2025 327th SirBogman 🇺🇸 862 35 3ms 15 Jan 2025 327th MeWhenI 🇻🇦 862 35 3ms 14 Feb 2025 327th fuzzylojik-golf 🇺🇸 862 35 3ms 16 May 2025 327th iczelia 🇩🇪 862 35 3ms 21 Sep 2025 327th denkyuu1 862 35 3ms 23 Feb 2026 336th error256 862 77 66ms 9 Jan 2025 337th Steffan153 🇫🇮 860 72 251ms 46 hours ago 337th JayXon 🇺🇸 860 72 260ms 45 hours ago 339th Steffan153 🇫🇮 860 82 7ms 3 days ago 340th evan18c 857 76 10ms 17 Apr 2025 341st Steffan153 🇫🇮 857 101 31ms 2 days ago 342nd Steffan153 🇫🇮 856 78 2ms 3 days ago 343rd JayXon 🇺🇸 856 107 136ms 9 Jan 2025 344th Steffan153 🇫🇮 855 81 95ms 18 hours ago 345th stefangimmillaro 855 102 10ms 2 Jan 2025 345th GolfingSuccess 🇬🇷 855 102 10ms 3 Jan 2025 345th kirjavascript 855 102 11ms 14 Feb 2025 345th junkondo-jp 855 102 15ms 30 May 2025 345th pardouin 🇫🇷 855 102 11ms 28 Jul 2025 350th canissimia 🇦🇶 854 113 6ms 10 Mar 2025 351st Steffan153 🇫🇮 853 99 15ms 2 days ago 352nd m-tkach 🇺🇦 853 118 26ms 9 Jan 2025 352nd JayXon 🇺🇸 853 118 5ms 11 Jan 2025 352nd Steffan153 🇫🇮 853 118 5ms 46 hours ago 355th Steffan153 🇫🇮 852 76 137ms 2 days ago 356th ovs-code 🇩🇪 851 84 402ms 6 Jan 2025 357th janAkali 🇷🇺 850 20 1,022ms 5 May 2025 357th snoozingnewt 🇨🇦 850 20 1,021ms 4 Dec 2025 359th MeWhenI 🇻🇦 849 39 36ms 3 Jan 2025 359th m-tkach 🇺🇦 849 39 37ms 6 Jan 2025 359th KatieLG 🇬🇧 849 39 33ms 7 Jan 2025 359th BREMAUCY 🇫🇷 849 39 36ms 6 Aug 2025 363rd edsrzf 🇳🇿 849 83 28ms 30 Nov 2025 364th ovs-code 🇩🇪 848 25 62ms 5 Jan 2025 365th canissimia 🇦🇶 848 83 9ms 16 days ago 366th Steffan153 🇫🇮 847 25 2ms 43 hours ago 367th edsrzf 🇳🇿 847 45 739ms 14 Feb 2026 367th albanian-laundromat 847 45 827ms 17 Feb 2026 367th CaedenHarper 🇨🇦 847 45 722ms 17 Feb 2026 370th antimon2 🇯🇵 847 55 250ms 6 Jan 2025 371st Steffan153 🇫🇮 847 99 425ms 2 days ago 372nd bizy-coder 847 103 10ms 2 Jan 2025 372nd DialFrost 🇸🇬 847 103 11ms 2 Jan 2025 372nd Shanethegamer 🇺🇸 847 103 10ms 6 Jan 2025 372nd dmrichwa 🇺🇸 847 103 10ms 8 Jan 2025 372nd KingSkyrock 🇺🇸 847 103 10ms 10 Jan 2025 372nd trinityy-7 847 103 11ms 21 Jul 2025 378th HumanoidCPU 846 44 4ms 1 Feb 2025 378th plcc0 846 44 5ms 9 Apr 2025 380th Just4FunCoder 846 77 11ms 24 Sep 2025 381st m-tkach 🇺🇦 846 105 26ms 9 Feb 2026 382nd ovs-code 🇩🇪 845 79 4ms 5 Jan 2025 383rd edsrzf 🇳🇿 845 110 17ms 9 Jul 2025 384th frankgraziano 845 111 2,342ms 13 Feb 2026 385th Steffan153 🇫🇮 844 92 101ms 2 days ago 385th JayXon 🇺🇸 844 92 115ms 47 hours ago 387th GolfingSuccess 🇬🇷 844 93 25ms 26 days ago 388th Shanethegamer 🇺🇸 844 100 2ms 5 Jan 2025 388th Waffle3z 844 100 2ms 7 Jan 2025 390th edsrzf 🇳🇿 844 121 175ms 28 Jan 2026 391st primo-ppcg 🇹🇭 843 117 42ms 27 Apr 2025 392nd JayXon 🇺🇸 842 99 1,307ms 10 Jan 2025 393rd Steffan153 🇫🇮 841 100 10ms 47 hours ago 394th ovs-code 🇩🇪 840 60 1,370ms 5 Jan 2025 395th Steffan153 🇫🇮 840 79 70ms 18 hours ago 396th edsrzf 🇳🇿 840 130 307ms 25 Aug 2025 396th GolfingSuccess 🇬🇷 840 130 288ms 31 Jan 2026 398th m-tkach 🇺🇦 839 104 15ms 7 Jan 2025 398th jared-hughes 839 104 11ms 7 Jan 2025 398th Lv0Sys 🇵🇱 839 104 10ms 22 Feb 2026 First Prev 321–400 of 1,077 Next Last