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?
Multitap Input 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 161st GolfingSuccess 🇬🇷 806 124 16ms 21 Jan 2026 162nd denkyuu1 804 73 38ms 13 Feb 2026 163rd frankgraziano 804 322 653ms 23 Jan 2026 164th helbling 🇨🇭 802 107 10ms 31 Jan 2026 165th 5cw 🇺🇸 800 125 17ms 6 Feb 2026 166th error256 799 88 892ms 17 Feb 2026 167th namelessiw 798 130 406ms 30 Jan 2026 168th edsrzf 🇳🇿 796 166 180ms 1 Feb 2026 169th blaztoma 🇱🇹 796 216 26ms 31 Jan 2026 170th bitsandbeyond 🇳🇱 795 108 11ms 24 Jan 2026 171st albanian-laundromat 793 181 374ms 23 Feb 2026 172nd stefangimmillaro 792 157 354ms 7 Feb 2026 173rd trinityy-7 789 99 3ms 28 Jan 2026 174th edsrzf 🇳🇿 788 90 12ms 1 Feb 2026 174th weeble 788 90 15ms 21 Feb 2026 176th MeWhenI 🇻🇦 787 116 437ms 3 Feb 2026 177th FoxInTheClouds 787 127 16ms 30 Jan 2026 177th LostSyntax21 🇬🇧 787 127 16ms 21 Feb 2026 179th dokutan 785 313 1,029ms 1 Feb 2026 180th albanian-laundromat 783 179 6ms 27 Jan 2026 181st rucin93 🇵🇱 782 153 68ms 23 Jan 2026 182nd bricknellj 781 128 15ms 21 Jan 2026 183rd stefangimmillaro 780 133 431ms 7 Feb 2026 184th bitsandbeyond 🇳🇱 777 126 8ms 25 Jan 2026 185th stefangimmillaro 775 129 16ms 14 Jan 2026 186th Maznek 773 111 13ms 9 Feb 2026 186th Lv0Sys 🇵🇱 773 111 10ms 21 Feb 2026 188th snoozingnewt 🇨🇦 772 113 99ms 1 Feb 2026 189th snoozingnewt 🇨🇦 772 143 142ms 4 Feb 2026 190th retrohun 772 154 205ms 27 Jan 2026 191st anter69 🇭🇺 769 130 15ms 20 Jan 2026 191st rucin93 🇵🇱 769 130 15ms 20 Jan 2026 193rd duckyluuk 🇳🇱 767 119 413ms 10 Feb 2026 194th Andrey-Plotnikov 766 112 12ms 16 Jan 2026 195th error256 765 79 1,325ms 8 Feb 2026 196th frosster 🇨🇦 764 135 3ms 8 Feb 2026 197th emgordon154 763 77 41ms 7 Feb 2026 198th SirBogman 🇺🇸 763 131 17ms 26 Jan 2026 198th ndren 763 131 15ms 27 Jan 2026 200th ethanlally 763 163 373ms 30 Jan 2026 201st ovs-code 🇩🇪 758 103 3ms 22 Feb 2026 202nd frankgraziano 758 154 8ms 24 Feb 2026 203rd cros107 🇦🇺 757 132 16ms 4 Feb 2026 203rd StefanHabel 🇨🇦 757 132 15ms 7 days ago 205th stefangimmillaro 756 80 1,290ms 15 Jan 2026 206th plcc0 752 133 15ms 30 Jan 2026 206th Lv0Sys 🇵🇱 752 133 16ms 21 Feb 2026 208th Natanaelel 🇸🇪 749 62 3ms 2 Feb 2026 209th Yax42 🇫🇷 746 139 476ms 12 Jan 2026 210th emgordon154 741 150 65ms 8 Feb 2026 211th JOrE20 740 116 10ms 31 Jan 2026 212th blaztoma 🇱🇹 738 63 3ms 1 Feb 2026 213th bac0id 736 151 464ms 31 Jan 2026 214th KatieLG 🇬🇧 735 136 16ms 31 Jan 2026 215th albanian-laundromat 730 355 20ms 23 Feb 2026 216th emgordon154 724 98 11ms 22 Feb 2026 217th dokutan 723 194 6ms 26 Jan 2026 218th blaztoma 🇱🇹 721 153 107ms 31 Jan 2026 219th D-MOVE 🇵🇭 720 84 1,292ms 28 Jan 2026 220th anter69 🇭🇺 716 82 38ms 26 Jan 2026 221st retrohun 714 119 6ms 15 days ago 222nd madex 🇩🇪 714 140 16ms 31 Jan 2026 223rd netfri25 🇮🇱 709 167 173ms 17 Feb 2026 224th bitsandbeyond 🇳🇱 708 157 80ms 26 Jan 2026 224th tailorspy 708 157 453ms 15 days ago 226th jkelly467 706 127 2,666ms 5 Feb 2026 227th souta-1326 704 142 15ms 19 Feb 2026 228th kg583 🇺🇸 704 190 34ms 26 Jan 2026 229th ahmetdemirag 🇨🇾 699 143 10ms 27 Jan 2026 229th solisolu 699 143 16ms 23 hours ago 231st Shanethegamer 🇺🇸 698 123 13ms 6 Dec 2025 232nd KatieLG 🇬🇧 692 124 10ms 31 Jan 2026 233rd TheSecondComing123 690 161 466ms 27 Feb 2026 234th albanian-laundromat 689 145 10ms 1 Feb 2026 235th AlephSquirrel 687 125 12ms 21 Jan 2026 235th madeforlosers 687 125 11ms 18 Feb 2026 237th bitsandbeyond 🇳🇱 686 75 4ms 24 Jan 2026 238th yeminghan2021 686 162 71ms 3 Feb 2026 239th olleicua 🇺🇸 683 86 38ms 22 Feb 2026 240th junkondo-jp 681 126 11ms 9 Feb 2026 First Prev 161–240 of 424 Next Last