The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. 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 161st kg583 🇺🇸 813 194 74ms 4 days ago 162nd MeWhenI 🇻🇦 812 103 17ms 19 days ago 163rd saito-ta 🇯🇵 812 120 2ms 18 days ago 164th ovs-code 🇩🇪 811 94 457ms 24 days ago 165th albanian-laundromat 811 184 3ms 14 days ago 166th jkelly467 807 137 2,677ms 21 days ago 167th IanUtley 806 131 14ms 16 hours ago 168th emgordon154 805 58 44ms 23 days ago 169th nwellnhof 🇩🇪 805 104 14ms 24 days ago 170th albanian-laundromat 804 171 4ms 28 Jan 2026 171st albanian-laundromat 802 177 196ms 15 days ago 171st kmathis22 802 177 410ms 13 days ago 173rd CaedenHarper 🇨🇦 798 178 419ms 2 days ago 174th voytxt 🇨🇿 797 105 12ms 15 Jan 2026 175th LostSyntax21 🇬🇧 794 64 38ms 22 days ago 176th sean-niemann 🇺🇸 794 153 429ms 19 days ago 177th albanian-laundromat 792 157 11ms 19 days ago 178th acotis 791 196 532ms 24 days ago 179th snoozingnewt 🇨🇦 787 162 117ms 16 days ago 180th Natanaelel 🇸🇪 785 92 3ms 24 days ago 181st MeWhenI 🇻🇦 785 110 1,252ms 19 days ago 182nd albanian-laundromat 784 205 59ms 16 days ago 183rd kg583 🇺🇸 783 150 42ms 19 Nov 2025 184th canissimia 🇦🇶 783 279 2ms 12 days ago 185th emgordon154 782 107 13ms 23 days ago 186th GolfingSuccess 🇬🇷 780 125 2ms 19 Nov 2025 187th albanian-laundromat 779 89 2ms 24 days ago 188th emgordon154 779 114 6ms 22 days ago 189th emgordon154 779 318 1,699ms 22 days ago 190th albanian-laundromat 779 322 9ms 9 hours ago 191st albanian-laundromat 777 175 113ms 19 days ago 192nd albanian-laundromat 777 178 89ms 18 days ago 193rd JRaspass 🇬🇧 776 93 3ms 24 days ago 194th albanian-laundromat 776 105 781ms 22 days ago 195th Program-Pi 775 108 11ms 3 days ago 196th pardouin 🇫🇷 774 126 2ms 23 days ago 196th Steffan153 🇫🇮 774 126 2ms 20 days ago 198th Natanaelel 🇸🇪 773 169 139ms 17 days ago 199th albanian-laundromat 773 299 1,446ms 20 days ago 200th albanian-laundromat 772 415 12ms 22 days ago 201st JOrE20 768 109 23ms 23 Feb 2026 202nd pardouin 🇫🇷 768 185 411ms 23 days ago 203rd JOrE20 758 107 11ms 24 days ago 204th CaedenHarper 🇨🇦 755 108 888ms 20 days ago 205th Yax42 🇫🇷 751 157 483ms 13 Jan 2026 206th emgordon154 748 176 520ms 22 days ago 207th voytxt 🇨🇿 748 309 1,398ms 6 Feb 2026 208th tailorspy 745 163 434ms 17 days ago 209th emgordon154 741 151 8ms 17 days ago 210th anter69 🇭🇺 736 69 63ms 27 Nov 2025 211th LostSyntax21 🇬🇧 732 219 42ms 22 days ago 212th dokutan 731 140 2ms 17 days ago 213th helbling 🇨🇭 728 115 15ms 20 days ago 214th GolfingSuccess 🇬🇷 728 145 17ms 3 days ago 215th edsrzf 🇳🇿 728 213 244ms 20 days ago 216th BambooleanLogic 🇸🇪 721 116 12ms 21 days ago 216th CaedenHarper 🇨🇦 721 116 14ms 20 days ago 216th gigaprofisi 🇺🇸 721 116 9ms 9 days ago 219th albanian-laundromat 716 175 1,404ms 20 days ago 220th ovs-code 🇩🇪 715 71 37ms 19 Nov 2025 220th Natanaelel 🇸🇪 715 71 36ms 25 days ago 220th D-MOVE 🇵🇭 715 71 37ms 24 days ago 220th sean-niemann 🇺🇸 715 71 38ms 14 days ago 220th sisyphus-ppcg 🇦🇺 715 71 35ms 8 days ago 225th Matter1024 🇮🇳 715 184 522ms 19 Feb 2026 226th Chinay-Domitrix 🇺🇸 714 155 2,620ms 22 days ago 227th snoozingnewt 🇨🇦 710 135 127ms 23 days ago 228th pardouin 🇫🇷 710 166 485ms 23 days ago 229th albanian-laundromat 707 145 120ms 25 days ago 230th snoozingnewt 🇨🇦 706 227 42ms 19 days ago 231st error256 705 72 39ms 24 days ago 232nd zacjl 702 119 7ms 20 days ago 233rd zakariamouhid 697 120 13ms 21 days ago 233rd Just4FunCoder 697 120 17ms 14 days ago 235th npc1234cyber 696 73 37ms 22 days ago 236th madex 🇩🇪 696 159 2,680ms 3 days ago 237th GolfingSuccess 🇬🇷 691 101 180ms 24 days ago 237th sean-niemann 🇺🇸 691 101 161ms 21 days ago 239th dokutan 691 118 841ms 8 days ago 240th retrohun 687 100 19ms 22 days ago First Prev 161–240 of 371 Next Last