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 720th Maashau 618 108 5ms 29 Nov 2025 722nd tomh1012 616 116 535ms 20 days ago 723rd GolfingSuccess 🇬🇷 614 118 31ms 2 Jan 2025 723rd edsrzf 🇳🇿 614 118 10ms 25 Aug 2025 725th pardouin 🇫🇷 613 161 90ms 25 Apr 2025 726th dokutan 611 151 4ms 29 Apr 2025 727th HaxSam 610 143 10ms 27 Jun 2025 728th tatzyr 🇯🇵 609 81 274ms 5 Mar 2025 729th jared-hughes 609 107 16ms 7 Jan 2025 730th edsrzf 🇳🇿 609 178 388ms 2 Mar 2025 731st Herbert00709 🇵🇱 607 110 5ms 5 Jan 2025 732nd bac0id 607 138 416ms 10 Jan 2025 733rd snoozingnewt 🇨🇦 605 118 438ms 2 Nov 2025 734th dokutan 604 120 2ms 5 Feb 2025 735th Jacob385 604 139 363ms 28 Oct 2025 736th emgordon154 603 143 34ms 3 Jan 2025 737th MostParsingVex 603 153 14ms 5 Jan 2025 738th dokutan 603 166 3ms 4 Feb 2025 739th snoozingnewt 🇨🇦 603 181 297ms 2 Nov 2025 740th juliansiebert 🇩🇪 602 82 306ms 1 Mar 2025 741st c0d3-4-F00d 🇩🇪 602 111 2ms 9 Jan 2025 741st wansacis 🇩🇪 602 111 2ms 30 Jan 2025 741st prestosilver 🇺🇸 602 111 2ms 18 Nov 2025 744th aksyristos 602 145 10ms 11 Jan 2025 745th Shanethegamer 🇺🇸 600 108 150ms 8 Jan 2025 745th pardouin 🇫🇷 600 108 150ms 29 Jul 2025 747th denkyuu1 599 79 4,829ms 8 days ago 748th luuumine 🇫🇷 599 140 64ms 8 Dec 2025 749th denballakh 598 109 16ms 13 Jan 2025 750th dbut2 🇦🇺 597 183 283ms 14 Jan 2025 751st madex 🇩🇪 596 112 2ms 4 Jan 2025 751st Mandrzejy 🇵🇱 596 112 1ms 5 Jan 2025 753rd sean-niemann 🇺🇸 594 109 170ms 22 Oct 2025 754th Maximizer02 594 145 11ms 10 Jan 2025 755th xyangst 593 147 12ms 14 Feb 2025 756th FlorianCassayre 🇫🇷 592 110 11ms 14 Jan 2025 756th wobblybits 592 110 17ms 19 Aug 2025 758th msbranicky 592 169 5ms 1 Jun 2025 759th Yewzir 🇧🇪 592 208 1,807ms 14 Nov 2025 760th iczelia 🇩🇪 591 61 52ms 21 Sep 2025 761st Jay2k1 591 63 4ms 6 Nov 2025 762nd matricronia 591 113 2ms 1 Feb 2026 763rd Yewzir 🇧🇪 590 142 450ms 6 Jan 2025 764th ikskuh 589 209 1,658ms 27 Jun 2025 765th nemoyatpeace 587 111 10ms 18 Jan 2026 766th emgordon154 587 120 7ms 12 Jan 2025 767th snoozingnewt 🇨🇦 587 143 738ms 2 Nov 2025 768th Shanethegamer 🇺🇸 587 177 138ms 3 Jan 2025 768th WatMan77 587 177 132ms 27 May 2025 770th martindotexe 🇳🇴 587 186 274ms 16 May 2025 771st gastropner 586 114 2ms 5 Jul 2025 771st jupj 🇫🇮 586 114 2ms 27 Aug 2025 773rd dokutan 586 147 27ms 20 Feb 2025 774th emgordon154 584 93 2,537ms 2 Aug 2025 775th HumanoidCPU 583 95 6ms 1 Feb 2025 776th Shanethegamer 🇺🇸 583 143 1,318ms 4 Jan 2025 777th 051 🇸🇬 582 112 11ms 8 Oct 2025 778th mousetail 🇳🇱 579 59 24ms 6 Feb 2025 779th Natanaelel 🇸🇪 579 62 32ms 11 Jul 2025 780th Ripick 579 146 395ms 15 Feb 2025 781st emgordon154 578 87 1,233ms 5 Jan 2025 782nd CaedenHarper 🇨🇦 576 116 4ms 21 Nov 2025 782nd jgbaldwinbrown 576 116 5ms 2 Feb 2026 784th te-chnical 572 114 18ms 7 May 2025 785th blaztoma 🇱🇹 571 117 4ms 21 Sep 2025 785th warmCabin 571 117 5ms 31 Dec 2025 787th snoozingnewt 🇨🇦 570 83 212ms 27 Nov 2025 788th ikskuh 570 147 63ms 26 Sep 2025 789th jbdrucker 570 153 11ms 24 Jan 2025 790th HumanoidCPU 570 182 134ms 21 Nov 2025 791st blaztoma 🇱🇹 570 186 37ms 21 Sep 2025 792nd AstroOrbis 567 115 10ms 12 Jul 2025 792nd Matter1024 🇮🇳 567 115 10ms 25 Aug 2025 794th yzhs 🇩🇪 562 116 10ms 17 Jan 2025 794th tomh1012 562 116 18ms 20 days ago 796th bac0id 561 119 2ms 10 Jan 2025 797th Jaydosu 557 117 11ms 16 Apr 2025 797th calebaitken 557 117 12ms 16 Apr 2025 797th adoxography 557 117 11ms 31 Aug 2025 800th janAkali 🇷🇺 556 152 407ms 18 Jan 2025 First Prev 721–800 of 1,052 Next Last