The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 GolfingSuccess 🇬🇷 774 120 18ms 31 Jan 2026 562nd KasperKivimaeki 🇫🇮 773 22 1,021ms 15 Aug 2025 563rd ovs-code 🇩🇪 772 86 71ms 5 Jan 2025 563rd edsrzf 🇳🇿 772 86 69ms 12 Jul 2025 565th SirBogman 🇺🇸 772 108 1,418ms 23 Jan 2025 566th CaedenHarper 🇨🇦 772 113 12ms 31 Aug 2025 567th error256 771 79 108ms 3 days ago 568th ejini6969 770 43 38ms 14 Jun 2025 569th AdrienHache 🇫🇷 769 93 427ms 6 Jan 2025 570th tatzyr 🇯🇵 769 191 15ms 6 Apr 2025 571st error256 768 133 150ms 3 May 2025 571st fantaize 768 133 158ms 18 days ago 573rd kg583 🇺🇸 768 153 81ms 4 days ago 574th SectorCorruptor 766 72 355ms 3 days ago 575th DialFrost 🇸🇬 765 92 5ms 17 days ago 576th namelessiw 765 110 405ms 3 Oct 2025 576th MeWhenI 🇻🇦 765 110 581ms 7 Nov 2025 578th Yax42 🇫🇷 765 114 13ms 13 Nov 2025 579th error256 764 66 1,312ms 7 Jan 2025 580th stefangimmillaro 759 45 17ms 6 Jan 2025 581st edsrzf 🇳🇿 758 111 11ms 25 Feb 2026 582nd edsrzf 🇳🇿 757 28 59ms 2 Nov 2025 583rd DialFrost 🇸🇬 756 124 2,650ms 12 Jan 2025 584th Shanethegamer 🇺🇸 756 246 1,451ms 14 Apr 2025 585th snoozingnewt 🇨🇦 755 40 2ms 2 Nov 2025 586th MostParsingVex 755 111 477ms 7 Jan 2025 587th error256 754 94 471ms 15 Feb 2026 588th UnderKoen 🇳🇱 753 144 13ms 21 May 2025 589th smclaughlin-cf 752 116 15ms 21 Feb 2025 590th CLOStrophobic 🇮🇹 751 158 41ms 13 Feb 2025 591st rucin93 🇵🇱 750 89 2ms 2 Jan 2025 591st Alex-x90 🇺🇸 750 89 4ms 4 Jan 2025 593rd GolfingSuccess 🇬🇷 748 157 176ms 8 days ago 594th Vexxter9 🇳🇱 747 113 2ms 14 Jan 2025 595th Cube14yt 746 117 11ms 13 Nov 2025 596th denkyuu1 745 50 5ms 22 days ago 597th error256 744 113 489ms 24 Sep 2025 598th error256 744 250 1,426ms 27 Jul 2025 599th kkoenig 743 147 297ms 7 Sep 2025 600th anter69 🇭🇺 742 68 1,293ms 13 Mar 2025 601st qwertyuiop3 🇷🇺 742 113 455ms 15 May 2025 602nd stefangimmillaro 740 105 113ms 3 Jan 2025 603rd snoozingnewt 🇨🇦 738 124 103ms 20 Nov 2025 604th emgordon154 738 252 1,492ms 15 Apr 2025 605th Shanethegamer 🇺🇸 737 94 112ms 6 Jan 2025 606th qwertyuiop3 🇷🇺 734 91 1ms 15 May 2025 607th SirBogman 🇺🇸 733 49 33ms 9 Jan 2025 608th XenThe 🇬🇧 733 119 14ms 25 Nov 2025 609th emgordon154 731 29 133ms 11 Sep 2025 610th Kacarott 🇦🇺 729 91 68ms 6 Jan 2025 611th edsrzf 🇳🇿 729 95 99ms 1 Feb 2026 612th SirBogman 🇺🇸 729 115 63ms 16 Jan 2025 613th MarcMush 🇫🇷 728 64 311ms 29 Jan 2025 614th annaproxy 728 116 24ms 29 Aug 2025 615th duckyluuk 🇳🇱 727 108 41ms 4 Jan 2025 616th MostParsingVex 726 92 4ms 7 Jan 2025 616th Lv0Sys 🇵🇱 726 92 4ms 10 Dec 2025 618th CarsonChr 🇺🇸 721 121 11ms 5 Jan 2025 618th didion0 🇺🇸 721 121 13ms 24 Feb 2025 618th SebassNoob 721 121 10ms 8 Aug 2025 621st frankgraziano 721 128 6ms 23 Aug 2025 622nd CLOStrophobic 🇮🇹 721 144 136ms 28 May 2025 622nd Andriamanitra 🇫🇮 721 144 149ms 7 Jun 2025 624th GrayJoKing 🇦🇺 719 117 11ms 25 Feb 2026 625th edsrzf 🇳🇿 717 124 27ms 2 Feb 2026 626th j2e2 🇪🇸 716 103 4ms 6 Feb 2025 627th iliazeus 715 122 12ms 25 Nov 2025 628th albanian-laundromat 714 141 4ms 5 Jul 2025 629th luuumine 🇫🇷 714 143 145ms 8 Dec 2025 630th MeWhenI 🇻🇦 714 153 285ms 7 Jan 2025 631st MeWhenI 🇻🇦 712 87 231ms 36 hours ago 632nd DialFrost 🇸🇬 710 94 4ms 3 Jan 2025 633rd muser-logiccpu 🇺🇦 709 119 2ms 24 Jul 2025 634th helbling 🇨🇭 709 123 10ms 5 Jan 2025 635th CaedenHarper 🇨🇦 709 154 280ms 17 days ago 636th DialFrost 🇸🇬 706 66 343ms 3 Jan 2025 637th DialFrost 🇸🇬 706 253 3,967ms 13 Aug 2025 638th emgordon154 705 145 158ms 14 Mar 2025 639th stackofbears 704 51 34ms 10 Jan 2025 640th ovs-code 🇩🇪 703 64 9ms 5 Jan 2025 First Prev 561–640 of 1,078 Next Last