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 561st namelessiw 764 110 405ms 3 Oct 2025 561st MeWhenI 🇻🇦 764 110 581ms 7 Nov 2025 563rd kg583 🇺🇸 761 153 81ms 22 hours ago 564th stefangimmillaro 759 45 17ms 6 Jan 2025 565th edsrzf 🇳🇿 758 95 99ms 1 Feb 2026 566th edsrzf 🇳🇿 757 28 59ms 2 Nov 2025 567th DialFrost 🇸🇬 756 124 2,650ms 12 Jan 2025 568th Shanethegamer 🇺🇸 756 246 1,448ms 14 Apr 2025 569th MostParsingVex 755 111 477ms 7 Jan 2025 570th snoozingnewt 🇨🇦 754 40 2ms 2 Nov 2025 571st error256 754 94 471ms 15 Feb 2026 572nd UnderKoen 🇳🇱 753 144 13ms 21 May 2025 573rd smclaughlin-cf 752 116 10ms 21 Feb 2025 574th CLOStrophobic 🇮🇹 751 158 41ms 13 Feb 2025 575th rucin93 🇵🇱 750 89 2ms 2 Jan 2025 575th Alex-x90 🇺🇸 750 89 4ms 4 Jan 2025 577th Cube14yt 746 117 10ms 13 Nov 2025 578th denkyuu1 745 50 5ms 18 days ago 579th Vexxter9 🇳🇱 745 113 2ms 14 Jan 2025 580th frankgraziano 744 124 13ms 24 Feb 2026 581st error256 744 250 1,416ms 27 Jul 2025 582nd error256 743 113 489ms 24 Sep 2025 583rd kkoenig 743 147 297ms 7 Sep 2025 584th anter69 🇭🇺 742 68 1,293ms 13 Mar 2025 585th qwertyuiop3 🇷🇺 742 113 455ms 15 May 2025 586th GolfingSuccess 🇬🇷 742 157 176ms 4 days ago 587th stefangimmillaro 741 105 113ms 3 Jan 2025 588th MarcMush 🇫🇷 739 64 311ms 29 Jan 2025 589th snoozingnewt 🇨🇦 738 124 104ms 20 Nov 2025 590th emgordon154 738 252 1,439ms 15 Apr 2025 591st qwertyuiop3 🇷🇺 734 91 1ms 15 May 2025 592nd SirBogman 🇺🇸 733 49 33ms 9 Jan 2025 593rd XenThe 🇬🇧 733 119 12ms 25 Nov 2025 594th emgordon154 731 29 133ms 11 Sep 2025 595th rucin93 🇵🇱 731 88 112ms 18 Feb 2025 596th SirBogman 🇺🇸 729 115 63ms 16 Jan 2025 597th annaproxy 728 116 24ms 29 Aug 2025 598th duckyluuk 🇳🇱 727 108 41ms 4 Jan 2025 599th MostParsingVex 726 92 4ms 7 Jan 2025 599th Lv0Sys 🇵🇱 726 92 4ms 10 Dec 2025 601st Kacarott 🇦🇺 725 91 68ms 6 Jan 2025 602nd CarsonChr 🇺🇸 721 121 10ms 5 Jan 2025 602nd didion0 🇺🇸 721 121 12ms 24 Feb 2025 602nd SebassNoob 721 121 11ms 8 Aug 2025 605th frankgraziano 721 128 6ms 23 Aug 2025 606th CLOStrophobic 🇮🇹 721 144 136ms 28 May 2025 606th Andriamanitra 🇫🇮 721 144 149ms 7 Jun 2025 608th DialFrost 🇸🇬 717 66 343ms 3 Jan 2025 609th edsrzf 🇳🇿 717 124 27ms 2 Feb 2026 610th j2e2 🇪🇸 716 103 4ms 6 Feb 2025 611th iliazeus 715 122 13ms 25 Nov 2025 612th MeWhenI 🇻🇦 714 153 285ms 7 Jan 2025 613th luuumine 🇫🇷 713 143 146ms 8 Dec 2025 614th DialFrost 🇸🇬 710 94 4ms 3 Jan 2025 615th albanian-laundromat 710 141 4ms 5 Jul 2025 616th helbling 🇨🇭 709 123 10ms 5 Jan 2025 617th CaedenHarper 🇨🇦 709 154 280ms 14 days ago 618th muser-logiccpu 🇺🇦 708 119 2ms 24 Jul 2025 619th DialFrost 🇸🇬 706 253 3,967ms 13 Aug 2025 620th stackofbears 704 51 34ms 10 Jan 2025 621st emgordon154 704 145 172ms 14 Mar 2025 622nd ovs-code 🇩🇪 703 64 9ms 5 Jan 2025 623rd j2e2 🇪🇸 703 95 1ms 19 Feb 2025 623rd iczelia 🇩🇪 703 95 4ms 24 Sep 2025 625th tobeannouncd 701 148 129ms 20 Jan 2025 626th DialFrost 🇸🇬 700 92 104ms 30 Nov 2025 627th imperfect-fourth 700 156 278ms 11 days ago 628th stefangimmillaro 699 131 159ms 3 Jan 2025 629th stefangimmillaro 698 121 380ms 6 Jan 2025 630th fuzzylojik-golf 🇺🇸 694 103 374ms 23 May 2025 631st dominikfhnw 693 52 51ms 30 Mar 2025 632nd GolfingSuccess 🇬🇷 693 108 4ms 31 Dec 2024 632nd Shanethegamer 🇺🇸 693 108 4ms 1 Jan 2025 632nd helbling 🇨🇭 693 108 4ms 4 Jan 2025 632nd dokutan 693 108 4ms 6 Jan 2025 632nd galloj 🇨🇿 693 108 4ms 23 Jan 2025 632nd edsrzf 🇳🇿 693 108 4ms 14 Mar 2025 632nd stefangimmillaro 693 108 4ms 12 Jul 2025 632nd iczelia 🇩🇪 693 108 4ms 21 Sep 2025 632nd emgordon154 693 108 4ms 3 Nov 2025 First Prev 561–640 of 1,058 Next Last