The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 74th GolfingSuccess 🇬🇷 946 35 37ms 15 Feb 2026 74th sean-niemann 🇺🇸 946 35 36ms 15 Feb 2026 74th JayXon 🇺🇸 946 35 38ms 15 Feb 2026 74th xsot 🇸🇬 946 35 35ms 16 Feb 2026 85th stefangimmillaro 944 69 10ms 31 Dec 2024 85th DialFrost 🇸🇬 944 69 10ms 1 Jan 2025 85th bizy-coder 944 69 11ms 2 Jan 2025 85th rucin93 🇵🇱 944 69 10ms 2 Jan 2025 85th MeWhenI 🇻🇦 944 69 10ms 3 Jan 2025 85th msbranicky 944 69 10ms 4 Jan 2025 85th orthoplex 🇨🇽 944 69 11ms 5 Jan 2025 85th ryyyn 🇺🇸 944 69 10ms 6 Jan 2025 85th inventshah 944 69 10ms 6 Jan 2025 85th ridingqwerty 🇺🇸 944 69 11ms 7 Jan 2025 85th SirBogman 🇺🇸 944 69 10ms 9 Jan 2025 85th inverseLorentz 🇦🇺 944 69 10ms 10 Jan 2025 85th 5cw 🇺🇸 944 69 11ms 11 Jan 2025 85th decorator-factory 944 69 10ms 12 Jan 2025 85th asterized 944 69 11ms 13 Jan 2025 85th bob-th 944 69 10ms 15 Jan 2025 85th annaproxy 944 69 11ms 22 Jan 2025 85th alemelis 944 69 34ms 4 Jun 2025 85th jipsong 🇩🇪 944 69 30ms 9 Jun 2025 85th nwellnhof 🇩🇪 944 69 11ms 9 Jul 2025 85th RaBa21 🇭🇺 944 69 11ms 19 Jul 2025 85th wuduculfre 944 69 11ms 22 Jul 2025 85th qpwoeirut 944 69 10ms 3 Aug 2025 85th FEZfan 🇦🇺 944 69 11ms 1 Nov 2025 85th Yewzir 🇧🇪 944 69 10ms 1 Dec 2025 85th ahmetdemirag 🇨🇾 944 69 10ms 24 Dec 2025 85th Lv0Sys 🇵🇱 944 69 11ms 22 Feb 2026 112th saito-ta 🇯🇵 943 32 2ms 3 Jan 2025 112th ovs-code 🇩🇪 943 32 3ms 3 Jan 2025 112th HPWiz 🇳🇿 943 32 3ms 5 Jan 2025 112th sisyphus-ppcg 🇦🇺 943 32 2ms 6 Jan 2025 112th lynn 943 32 2ms 6 Jan 2025 112th pardouin 🇫🇷 943 32 3ms 7 Jan 2025 112th tatzyr 🇯🇵 943 32 3ms 16 Jan 2025 112th primo-ppcg 🇹🇭 943 32 3ms 20 Jan 2025 112th Steffan153 🇫🇮 943 32 3ms 14 Feb 2026 112th GolfingSuccess 🇬🇷 943 32 3ms 15 Feb 2026 112th sean-niemann 🇺🇸 943 32 3ms 15 Feb 2026 112th JayXon 🇺🇸 943 32 3ms 16 Feb 2026 112th xsot 🇸🇬 943 32 3ms 16 Feb 2026 125th sean-niemann 🇺🇸 931 40 5ms 31 Dec 2024 125th stefangimmillaro 931 40 4ms 4 Jan 2025 125th sisyphus-ppcg 🇦🇺 931 40 4ms 5 Jan 2025 125th xsot 🇸🇬 931 40 5ms 10 Jan 2025 125th JayXon 🇺🇸 931 40 4ms 11 Jan 2025 125th primo-ppcg 🇹🇭 931 40 5ms 21 Jan 2025 125th GolfingSuccess 🇬🇷 931 40 5ms 9 Feb 2025 125th targrik 931 40 5ms 3 Jul 2025 125th edsrzf 🇳🇿 931 40 5ms 9 Jul 2025 125th Steffan153 🇫🇮 931 40 5ms 16 Feb 2026 135th HETHAT 🇩🇿 931 70 10ms 3 Aug 2025 135th bricknellj 931 70 11ms 30 Oct 2025 137th nwellnhof 🇩🇪 928 72 4ms 28 Jul 2025 138th JayXon 🇺🇸 928 94 11ms 28 Jul 2025 139th ovs-code 🇩🇪 921 39 102ms 4 Jan 2025 139th lynn 921 39 101ms 6 Jan 2025 139th sisyphus-ppcg 🇦🇺 921 39 97ms 6 Jan 2025 139th pardouin 🇫🇷 921 39 104ms 7 Jan 2025 139th tatzyr 🇯🇵 921 39 98ms 1 Mar 2025 139th sean-niemann 🇺🇸 921 39 108ms 15 Feb 2026 139th JayXon 🇺🇸 921 39 97ms 16 Feb 2026 139th Steffan153 🇫🇮 921 39 96ms 16 Feb 2026 147th radarek 🇵🇱 920 36 40ms 3 Jan 2025 147th error256 920 36 41ms 3 Jan 2025 147th emgordon154 920 36 46ms 5 Jan 2025 147th Lydxn 🇨🇦 920 36 40ms 23 Jan 2025 151st kg583 🇺🇸 919 60 390ms 2 Jan 2025 151st JayXon 🇺🇸 919 60 397ms 5 Jan 2025 151st commandz0 🇺🇸 919 60 439ms 1 Sep 2025 151st Steffan153 🇫🇮 919 60 375ms 26 days ago 155th Shanethegamer 🇺🇸 918 71 11ms 2 Jan 2025 155th aksyristos 918 71 11ms 3 Jan 2025 155th voytxt 🇨🇿 918 71 11ms 3 Jan 2025 155th KatieLG 🇬🇧 918 71 9ms 3 Jan 2025 155th maxgodfrey2004 🇨🇦 918 71 11ms 4 Jan 2025 155th mrmena 🇦🇺 918 71 11ms 5 Jan 2025 First Prev 81–160 of 1,074 Next Last