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 315th fuzzylojik-golf 🇺🇸 862 35 3ms 16 May 2025 315th iczelia 🇩🇪 862 35 3ms 21 Sep 2025 315th denkyuu1 862 35 3ms 23 Feb 2026 324th JayXon 🇺🇸 862 98 405ms 9 Jan 2025 325th antimon2 🇯🇵 860 55 267ms 6 Jan 2025 326th Steffan153 🇫🇮 860 82 7ms 2 hours ago 327th lyphyser 858 42 50ms 3 Jan 2025 328th edsrzf 🇳🇿 858 75 105ms 1 Dec 2025 329th evan18c 857 76 10ms 17 Apr 2025 330th error256 857 77 66ms 9 Jan 2025 331st Steffan153 🇫🇮 857 101 31ms 31 mins ago 332nd Steffan153 🇫🇮 856 78 2ms 3 hours ago 333rd JayXon 🇺🇸 856 107 168ms 9 Jan 2025 334th stefangimmillaro 855 102 12ms 2 Jan 2025 334th GolfingSuccess 🇬🇷 855 102 10ms 3 Jan 2025 334th kirjavascript 855 102 10ms 14 Feb 2025 334th junkondo-jp 855 102 13ms 30 May 2025 334th pardouin 🇫🇷 855 102 11ms 28 Jul 2025 339th edsrzf 🇳🇿 854 99 405ms 9 Jul 2025 340th canissimia 🇦🇶 854 113 6ms 10 Mar 2025 341st JayXon 🇺🇸 853 73 279ms 24 May 2025 342nd m-tkach 🇺🇦 853 118 26ms 9 Jan 2025 343rd edsrzf 🇳🇿 852 65 8ms 25 Aug 2025 344th Steffan153 🇫🇮 852 76 137ms 67 mins ago 345th janAkali 🇷🇺 850 20 1,022ms 5 May 2025 345th snoozingnewt 🇨🇦 850 20 1,021ms 4 Dec 2025 347th ovs-code 🇩🇪 850 84 402ms 6 Jan 2025 348th MeWhenI 🇻🇦 849 39 36ms 3 Jan 2025 348th m-tkach 🇺🇦 849 39 37ms 6 Jan 2025 348th KatieLG 🇬🇧 849 39 33ms 7 Jan 2025 348th BREMAUCY 🇫🇷 849 39 36ms 6 Aug 2025 352nd edsrzf 🇳🇿 849 83 28ms 30 Nov 2025 353rd ovs-code 🇩🇪 848 25 62ms 5 Jan 2025 354th canissimia 🇦🇶 848 83 9ms 13 days ago 355th JayXon 🇺🇸 848 118 5ms 11 Jan 2025 356th edsrzf 🇳🇿 847 45 739ms 14 Feb 2026 356th albanian-laundromat 847 45 827ms 17 Feb 2026 356th CaedenHarper 🇨🇦 847 45 722ms 17 Feb 2026 359th error256 847 85 129ms 9 Jan 2025 360th Steffan153 🇫🇮 847 99 442ms 108 mins ago 361st bizy-coder 847 103 9ms 2 Jan 2025 361st DialFrost 🇸🇬 847 103 9ms 2 Jan 2025 361st Shanethegamer 🇺🇸 847 103 12ms 6 Jan 2025 361st dmrichwa 🇺🇸 847 103 10ms 8 Jan 2025 361st KingSkyrock 🇺🇸 847 103 10ms 10 Jan 2025 361st trinityy-7 847 103 10ms 21 Jul 2025 367th HumanoidCPU 846 44 4ms 1 Feb 2025 367th plcc0 846 44 5ms 9 Apr 2025 369th Just4FunCoder 846 77 11ms 24 Sep 2025 370th m-tkach 🇺🇦 846 105 26ms 9 Feb 2026 371st ovs-code 🇩🇪 846 106 16ms 5 Jan 2025 372nd ovs-code 🇩🇪 845 79 4ms 5 Jan 2025 373rd edsrzf 🇳🇿 845 110 17ms 9 Jul 2025 374th frankgraziano 845 111 2,342ms 13 Feb 2026 375th GolfingSuccess 🇬🇷 844 93 25ms 23 days ago 376th primo-ppcg 🇹🇭 843 117 42ms 27 Apr 2025 377th edsrzf 🇳🇿 843 121 167ms 28 Jan 2026 378th JayXon 🇺🇸 842 99 1,307ms 10 Jan 2025 379th Shanethegamer 🇺🇸 842 100 2ms 5 Jan 2025 379th Waffle3z 842 100 2ms 7 Jan 2025 381st edsrzf 🇳🇿 840 130 307ms 25 Aug 2025 381st GolfingSuccess 🇬🇷 840 130 288ms 31 Jan 2026 383rd ovs-code 🇩🇪 839 60 1,370ms 5 Jan 2025 384th m-tkach 🇺🇦 839 104 14ms 7 Jan 2025 384th jared-hughes 839 104 11ms 7 Jan 2025 384th Lv0Sys 🇵🇱 839 104 13ms 22 Feb 2026 387th edsrzf 🇳🇿 839 110 14ms 17 Nov 2025 388th Shanethegamer 🇺🇸 838 36 3ms 4 Jan 2025 389th snyderek 🇺🇸 838 100 60ms 7 Jan 2025 390th j2e2 🇪🇸 838 107 15ms 7 Feb 2025 391st JayXon 🇺🇸 838 147 1,675ms 15 Sep 2025 392nd JayXon 🇺🇸 837 93 119ms 8 Jan 2025 393rd DialFrost 🇸🇬 835 43 100ms 7 Jan 2025 393rd SirBogman 🇺🇸 835 43 98ms 10 Jan 2025 393rd nwellnhof 🇩🇪 835 43 97ms 14 Jan 2025 393rd GrayJoKing 🇦🇺 835 43 106ms 17 Nov 2025 393rd edsrzf 🇳🇿 835 43 105ms 10 Jan 2026 393rd denkyuu1 835 43 89ms 23 Feb 2026 399th ovs-code 🇩🇪 835 66 433ms 3 Jan 2025 399th AlephSquirrel 835 66 463ms 5 Jan 2025 First Prev 321–400 of 1,053 Next Last