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 313th denkyuu1 862 35 3ms 23 Feb 2026 322nd JayXon 🇺🇸 862 98 405ms 9 Jan 2025 323rd error256 862 100 27ms 10 May 2025 324th antimon2 🇯🇵 860 55 267ms 6 Jan 2025 325th Steffan153 🇫🇮 860 82 7ms 35 mins ago 326th lyphyser 858 42 50ms 3 Jan 2025 327th edsrzf 🇳🇿 858 75 105ms 1 Dec 2025 328th evan18c 857 76 10ms 17 Apr 2025 329th error256 857 77 66ms 9 Jan 2025 330th Steffan153 🇫🇮 856 78 2ms 80 mins ago 331st JayXon 🇺🇸 856 107 168ms 9 Jan 2025 332nd stefangimmillaro 855 102 12ms 2 Jan 2025 332nd GolfingSuccess 🇬🇷 855 102 10ms 3 Jan 2025 332nd kirjavascript 855 102 10ms 14 Feb 2025 332nd junkondo-jp 855 102 13ms 30 May 2025 332nd pardouin 🇫🇷 855 102 11ms 28 Jul 2025 337th edsrzf 🇳🇿 854 99 405ms 9 Jul 2025 338th canissimia 🇦🇶 854 113 6ms 10 Mar 2025 339th JayXon 🇺🇸 853 73 279ms 24 May 2025 340th m-tkach 🇺🇦 853 118 26ms 9 Jan 2025 341st edsrzf 🇳🇿 852 65 8ms 25 Aug 2025 342nd janAkali 🇷🇺 850 20 1,022ms 5 May 2025 342nd snoozingnewt 🇨🇦 850 20 1,021ms 4 Dec 2025 344th ovs-code 🇩🇪 850 84 402ms 6 Jan 2025 345th MeWhenI 🇻🇦 849 39 36ms 3 Jan 2025 345th m-tkach 🇺🇦 849 39 37ms 6 Jan 2025 345th KatieLG 🇬🇧 849 39 33ms 7 Jan 2025 345th BREMAUCY 🇫🇷 849 39 36ms 6 Aug 2025 349th edsrzf 🇳🇿 849 83 28ms 30 Nov 2025 350th ovs-code 🇩🇪 848 25 62ms 5 Jan 2025 351st canissimia 🇦🇶 848 83 9ms 13 days ago 352nd JayXon 🇺🇸 848 118 5ms 11 Jan 2025 353rd edsrzf 🇳🇿 847 45 739ms 14 Feb 2026 353rd albanian-laundromat 847 45 827ms 17 Feb 2026 353rd CaedenHarper 🇨🇦 847 45 722ms 17 Feb 2026 356th error256 847 85 129ms 9 Jan 2025 357th bizy-coder 847 103 9ms 2 Jan 2025 357th DialFrost 🇸🇬 847 103 9ms 2 Jan 2025 357th Shanethegamer 🇺🇸 847 103 12ms 6 Jan 2025 357th dmrichwa 🇺🇸 847 103 10ms 8 Jan 2025 357th KingSkyrock 🇺🇸 847 103 10ms 10 Jan 2025 357th trinityy-7 847 103 10ms 21 Jul 2025 363rd HumanoidCPU 846 44 4ms 1 Feb 2025 363rd plcc0 846 44 5ms 9 Apr 2025 365th Just4FunCoder 846 77 11ms 24 Sep 2025 366th m-tkach 🇺🇦 846 105 26ms 9 Feb 2026 367th ovs-code 🇩🇪 846 106 16ms 5 Jan 2025 368th ovs-code 🇩🇪 845 79 4ms 5 Jan 2025 369th edsrzf 🇳🇿 845 110 17ms 9 Jul 2025 370th frankgraziano 845 111 2,342ms 13 Feb 2026 371st GolfingSuccess 🇬🇷 844 93 25ms 23 days ago 372nd primo-ppcg 🇹🇭 843 117 42ms 27 Apr 2025 373rd edsrzf 🇳🇿 843 121 167ms 28 Jan 2026 374th JayXon 🇺🇸 842 99 1,307ms 10 Jan 2025 375th Shanethegamer 🇺🇸 842 100 2ms 5 Jan 2025 375th Waffle3z 842 100 2ms 7 Jan 2025 377th ovs-code 🇩🇪 839 60 1,370ms 5 Jan 2025 378th m-tkach 🇺🇦 839 104 14ms 7 Jan 2025 378th jared-hughes 839 104 11ms 7 Jan 2025 378th Lv0Sys 🇵🇱 839 104 13ms 22 Feb 2026 381st edsrzf 🇳🇿 839 110 14ms 17 Nov 2025 382nd edsrzf 🇳🇿 839 130 307ms 25 Aug 2025 382nd GolfingSuccess 🇬🇷 839 130 288ms 31 Jan 2026 384th Shanethegamer 🇺🇸 838 36 3ms 4 Jan 2025 385th j2e2 🇪🇸 838 107 15ms 7 Feb 2025 386th JayXon 🇺🇸 838 147 1,675ms 15 Sep 2025 387th JayXon 🇺🇸 837 93 119ms 8 Jan 2025 388th snyderek 🇺🇸 837 100 60ms 7 Jan 2025 389th DialFrost 🇸🇬 835 43 100ms 7 Jan 2025 389th SirBogman 🇺🇸 835 43 98ms 10 Jan 2025 389th nwellnhof 🇩🇪 835 43 97ms 14 Jan 2025 389th GrayJoKing 🇦🇺 835 43 106ms 17 Nov 2025 389th edsrzf 🇳🇿 835 43 105ms 10 Jan 2026 389th denkyuu1 835 43 89ms 23 Feb 2026 395th ovs-code 🇩🇪 835 66 433ms 3 Jan 2025 395th AlephSquirrel 835 66 463ms 5 Jan 2025 395th CaedenHarper 🇨🇦 835 66 422ms 19 Jan 2025 395th emgordon154 835 66 374ms 14 Apr 2025 395th fuzzylojik-golf 🇺🇸 835 66 437ms 7 Jul 2025 395th duckyluuk 🇳🇱 835 66 394ms 9 Jul 2025 First Prev 321–400 of 1,049 Next Last