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?
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 1st AdrienHache 🇫🇷 1,000 44 50ms 1 Feb 2026 2nd ovs-code 🇩🇪 989 47 3ms 26 Jan 2026 3rd emgordon154 973 50 51ms 2 Feb 2026 4th nwellnhof 🇩🇪 971 53 4ms 26 Jan 2026 4th saito-ta 🇯🇵 971 53 3ms 29 Jan 2026 6th Natanaelel 🇸🇪 963 61 37ms 22 Jan 2026 6th pardouin 🇫🇷 963 61 39ms 28 Jan 2026 6th D-MOVE 🇵🇭 963 61 40ms 3 Feb 2026 9th khvdm 952 105 60ms 31 Jan 2026 10th ovs-code 🇩🇪 949 59 33ms 24 Jan 2026 11th nwellnhof 🇩🇪 949 60 141ms 26 Jan 2026 12th edsrzf 🇳🇿 945 64 1,267ms 30 Jan 2026 12th pardouin 🇫🇷 945 64 1,286ms 30 Jan 2026 14th nwellnhof 🇩🇪 943 91 11ms 26 Jan 2026 14th rucin93 🇵🇱 943 91 11ms 28 Jan 2026 14th emplv 🇱🇻 943 91 11ms 28 Jan 2026 14th sean-niemann 🇺🇸 943 91 10ms 29 Jan 2026 14th lukegustafson 🇺🇸 943 91 12ms 1 Feb 2026 14th Steffan153 🇫🇮 943 91 10ms 11 Feb 2026 20th bitsandbeyond 🇳🇱 938 64 332ms 6 Dec 2025 21st pardouin 🇫🇷 934 107 19ms 30 Jan 2026 22nd 2bular 929 50 3ms 2 Feb 2026 22nd bstrat 929 50 3ms 11 Feb 2026 24th albanian-laundromat 929 64 8ms 27 Jan 2026 25th rhdqor213 929 84 3ms 20 days ago 26th Mukundan314 926 108 88ms 5 Dec 2025 26th ovs-code 🇩🇪 926 108 72ms 5 Dec 2025 26th Seek64 🇩🇪 926 108 30ms 19 Jan 2026 29th Steffan153 🇫🇮 925 76 795ms 17 Feb 2026 30th pardouin 🇫🇷 922 99 462ms 30 Jan 2026 31st ovs-code 🇩🇪 921 77 11ms 18 days ago 32nd canissimia 🇦🇶 919 81 58ms 7 Feb 2026 33rd Natanaelel 🇸🇪 918 61 33ms 25 Jan 2026 34th Steffan153 🇫🇮 917 109 31ms 27 days ago 35th edsrzf 🇳🇿 913 94 10ms 21 Jan 2026 36th emgordon154 911 51 3ms 12 days ago 37th nwellnhof 🇩🇪 909 110 42ms 27 Jan 2026 38th antimon2 🇯🇵 906 79 367ms 28 Jan 2026 39th rucin93 🇵🇱 906 90 146ms 28 Jan 2026 39th sean-niemann 🇺🇸 906 90 151ms 29 Jan 2026 41st Natanaelel 🇸🇪 904 63 142ms 62 mins ago 42nd Natanaelel 🇸🇪 903 57 4ms 1 Feb 2026 42nd sisyphus-ppcg 🇦🇺 903 57 3ms 2 Feb 2026 44th ovs-code 🇩🇪 903 65 43ms 6 Dec 2025 45th AdrienHache 🇫🇷 902 115 522ms 6 Feb 2026 46th pardouin 🇫🇷 897 100 2,876ms 28 Jan 2026 47th emplv 🇱🇻 896 91 153ms 28 Jan 2026 48th kg583 🇺🇸 895 102 454ms 31 Dec 2025 49th edsrzf 🇳🇿 890 79 810ms 18 Jan 2026 50th ovs-code 🇩🇪 890 98 101ms 18 days ago 51st edsrzf 🇳🇿 890 110 269ms 5 Feb 2026 52nd snyderek 🇺🇸 889 125 61ms 1 Feb 2026 53rd lynn 887 80 10ms 22 Feb 2026 54th albanian-laundromat 886 96 3ms 26 Feb 2026 55th ovs-code 🇩🇪 886 103 410ms 29 Jan 2026 56th hallvabo 🇳🇴 885 113 31ms 28 Jan 2026 57th error256 883 113 92ms 8 Feb 2026 57th edsrzf 🇳🇿 883 113 108ms 8 Feb 2026 57th albanian-laundromat 883 113 83ms 21 Feb 2026 60th edsrzf 🇳🇿 882 115 373ms 26 Jan 2026 61st edsrzf 🇳🇿 882 141 356ms 28 Jan 2026 62nd sean-niemann 🇺🇸 881 99 103ms 1 Feb 2026 63rd lyphyser 880 50 56ms 9 Dec 2025 64th edsrzf 🇳🇿 880 102 2,840ms 29 Jan 2026 65th edsrzf 🇳🇿 880 119 15ms 18 Jan 2026 66th edsrzf 🇳🇿 877 114 15ms 19 Jan 2026 66th Natanaelel 🇸🇪 877 114 15ms 23 Jan 2026 68th GrayJoKing 🇦🇺 876 65 150ms 1 Feb 2026 69th nwellnhof 🇩🇪 876 67 42ms 26 Jan 2026 70th emgordon154 876 126 116ms 2 Feb 2026 71st 2bular 875 64 34ms 16 Jan 2026 72nd edsrzf 🇳🇿 875 118 8ms 26 Jan 2026 73rd edsrzf 🇳🇿 872 111 6ms 15 Feb 2026 74th error256 872 120 13ms 10 Feb 2026 75th ovs-code 🇩🇪 871 136 128ms 3 Feb 2026 76th nwellnhof 🇩🇪 870 69 333ms 26 Jan 2026 77th acotis 870 152 167ms 4 Feb 2026 78th blaztoma 🇱🇹 869 115 15ms 26 Jan 2026 78th CornerMercury 🇬🇧 869 115 17ms 28 Jan 2026 78th sean-niemann 🇺🇸 869 115 15ms 29 Jan 2026 1–80 of 422 Next Last