The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 23 hours. Why not try and solve them ahead of time?
Continued Fractions in all languages in chars. 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 Chars Time Submitted 78th edsrzf 🇳🇿 872 99 1,238ms 28 Feb 2026 78th emgordon154 872 99 1,153ms 1 Mar 2026 83rd Steffan153 🇫🇮 871 163 409ms 25 days ago 84th KasperKivimaeki 🇫🇮 870 112 2ms 26 days ago 85th pardouin 🇫🇷 870 167 283ms 27 Feb 2026 85th edsrzf 🇳🇿 870 167 287ms 1 Mar 2026 85th Steffan153 🇫🇮 870 167 289ms 27 days ago 85th GolfingSuccess 🇬🇷 870 167 285ms 9 days ago 89th Steffan153 🇫🇮 867 94 954ms 1 Mar 2026 90th sean-niemann 🇺🇸 866 164 378ms 20 days ago 91st KasperKivimaeki 🇫🇮 865 168 301ms 27 days ago 92nd bitsandbeyond 🇳🇱 864 81 395ms 23 Feb 2026 93rd edsrzf 🇳🇿 864 128 2,783ms 26 days ago 94th nwellnhof 🇩🇪 862 55 194ms 27 Feb 2026 95th targrik 862 106 6ms 10 days ago 96th MeWhenI 🇻🇦 861 165 347ms 25 days ago 97th pardouin 🇫🇷 858 129 2,711ms 26 days ago 98th rucin93 🇵🇱 857 114 2ms 1 Jan 2026 98th GolfingSuccess 🇬🇷 857 114 2ms 27 Feb 2026 98th edsrzf 🇳🇿 857 114 2ms 1 Mar 2026 101st ovs-code 🇩🇪 854 104 8ms 27 Feb 2026 102nd Steffan153 🇫🇮 854 120 120ms 1 Mar 2026 103rd error256 852 124 13ms 6 days ago 104th dokutan 851 87 347ms 16 days ago 105th Steffan153 🇫🇮 850 128 5ms 1 Mar 2026 105th edsrzf 🇳🇿 850 128 5ms 1 Mar 2026 107th GolfingSuccess 🇬🇷 850 143 447ms 19 Nov 2025 108th UnderKoen 🇳🇱 850 148 5ms 5 days ago 109th kg583 🇺🇸 849 129 8ms 26 Feb 2026 110th ovs-code 🇩🇪 848 113 90ms 21 Nov 2025 111th edsrzf 🇳🇿 848 132 7ms 21 days ago 112th lynn 848 154 153ms 19 days ago 112th edsrzf 🇳🇿 848 154 149ms 12 days ago 114th kumavale 848 183 226ms 19 Nov 2025 115th Steffan153 🇫🇮 847 133 29ms 2 Mar 2026 116th albanian-laundromat 847 157 43ms 25 days ago 117th edsrzf 🇳🇿 846 108 6ms 26 days ago 118th FlorianCassayre 🇫🇷 845 96 10ms 16 days ago 119th weliveinhell 🇭🇹 845 99 9ms 1 Mar 2026 120th IanUtley 845 125 15ms 8 hours ago 121st edsrzf 🇳🇿 845 165 400ms 25 days ago 122nd edsrzf 🇳🇿 845 168 386ms 25 days ago 123rd kg583 🇺🇸 843 129 4ms 1 Mar 2026 124th KatieLG 🇬🇧 842 88 368ms 28 Feb 2026 125th GrayJoKing 🇦🇺 842 133 7ms 26 days ago 126th MeWhenI 🇻🇦 842 158 44ms 25 days ago 127th edsrzf 🇳🇿 841 149 1,441ms 22 days ago 128th edsrzf 🇳🇿 840 122 117ms 1 Mar 2026 129th edsrzf 🇳🇿 839 150 5ms 5 days ago 130th edsrzf 🇳🇿 839 188 77ms 2 days ago 130th Steffan153 🇫🇮 839 188 76ms 2 days ago 132nd MeWhenI 🇻🇦 839 191 43ms 25 days ago 133rd Lv0Sys 🇵🇱 838 157 430ms 28 Feb 2026 134th albanian-laundromat 837 100 8ms 28 Feb 2026 134th Maznek 837 100 9ms 2 Mar 2026 136th ovs-code 🇩🇪 837 156 138ms 21 Nov 2025 137th error256 836 108 63ms 22 days ago 138th albanian-laundromat 835 174 284ms 24 Feb 2026 139th MeWhenI 🇻🇦 833 61 35ms 12 days ago 140th ovs-code 🇩🇪 833 117 2ms 21 Nov 2025 141st edsrzf 🇳🇿 833 141 42ms 27 days ago 142nd snyderek 🇺🇸 832 146 447ms 22 days ago 143rd edsrzf 🇳🇿 830 132 11ms 28 Feb 2026 143rd CLOStrophobic 🇮🇹 830 132 9ms 3 days ago 145th GolfingSuccess 🇬🇷 830 171 377ms 28 Feb 2026 146th MeWhenI 🇻🇦 829 150 10ms 25 days ago 147th edsrzf 🇳🇿 828 154 102ms 28 Feb 2026 148th Steffan153 🇫🇮 826 84 2ms 20 days ago 149th Mukundan314 826 118 2ms 19 Nov 2025 150th albanian-laundromat 826 194 40ms 25 days ago 151st 2bular 825 85 33ms 20 Nov 2025 152nd edsrzf 🇳🇿 825 124 4ms 28 Feb 2026 153rd MeWhenI 🇻🇦 824 165 122ms 25 days ago 154th edsrzf 🇳🇿 823 137 30ms 1 Mar 2026 155th edsrzf 🇳🇿 823 168 87ms 25 days ago 156th GolfingSuccess 🇬🇷 822 192 74ms 9 days ago 157th pardouin 🇫🇷 821 148 450ms 1 Mar 2026 158th h3ra993huskp 🇯🇵 821 173 397ms 1 Mar 2026 159th Lv0Sys 🇵🇱 821 177 287ms 28 Feb 2026 160th edsrzf 🇳🇿 820 182 3ms 21 days ago First Prev 81–160 of 376 Next Last