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?
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 241st madex 🇩🇪 696 159 2,680ms 7 days ago 242nd GolfingSuccess 🇬🇷 691 101 180ms 27 Feb 2026 242nd sean-niemann 🇺🇸 691 101 161ms 25 days ago 244th retrohun 687 100 19ms 26 days ago 245th error256 685 122 8ms 9 days ago 246th MeWhenI 🇻🇦 680 102 1ms 23 days ago 247th GolfingSuccess 🇬🇷 679 109 445ms 27 Feb 2026 248th Herbert00709 🇵🇱 679 179 1,437ms 23 days ago 249th SirBogman 🇺🇸 678 76 3ms 2 hours ago 250th MeWhenI 🇻🇦 677 144 2ms 23 days ago 250th xiaoyiming123 677 144 2ms 10 days ago 252nd ovs-code 🇩🇪 673 110 422ms 21 Nov 2025 252nd sean-niemann 🇺🇸 673 110 434ms 16 Jan 2026 252nd AlephSquirrel 673 110 433ms 31 Jan 2026 255th elgan65536 🇺🇸 671 231 224ms 9 Feb 2026 256th NickTheEASDude 🇺🇸 669 153 2ms 19 days ago 257th Lv0Sys 🇵🇱 668 76 35ms 28 Feb 2026 258th CaedenHarper 🇨🇦 667 111 400ms 26 Feb 2026 259th albanian-laundromat 667 209 397ms 23 days ago 260th GolfingSuccess 🇬🇷 659 123 10ms 19 Nov 2025 260th Yewzir 🇧🇪 659 123 11ms 19 Nov 2025 260th AlephSquirrel 659 123 29ms 19 Nov 2025 260th Natanaelel 🇸🇪 659 123 10ms 19 Nov 2025 260th ovs-code 🇩🇪 659 123 10ms 19 Nov 2025 260th 4atj 659 123 10ms 27 Nov 2025 260th bizy-coder 659 123 11ms 28 Nov 2025 260th 5cw 🇺🇸 659 123 10ms 6 Dec 2025 260th HPWiz 🇳🇿 659 123 10ms 17 Dec 2025 260th davecame 659 123 10ms 17 Dec 2025 260th blaztoma 🇱🇹 659 123 10ms 26 Feb 2026 260th edsrzf 🇳🇿 659 123 10ms 26 Feb 2026 260th zacjl 659 123 30ms 26 Feb 2026 260th StefanHabel 🇨🇦 659 123 9ms 28 Feb 2026 260th Lv0Sys 🇵🇱 659 123 10ms 28 Feb 2026 260th commandz0 🇺🇸 659 123 10ms 28 Feb 2026 260th Emutis 🇱🇹 659 123 10ms 28 Feb 2026 260th MeWhenI 🇻🇦 659 123 14ms 27 days ago 260th m-tkach 🇺🇦 659 123 10ms 25 days ago 260th sisyphus-ppcg 🇦🇺 659 123 11ms 18 days ago 260th orthoplex 🇨🇽 659 123 10ms 16 days ago 260th duckyluuk 🇳🇱 659 123 30ms 6 days ago 282nd rucin93 🇵🇱 658 106 166ms 26 days ago 283rd arcpolaris 658 179 453ms 5 days ago 284th tomh1012 655 180 532ms 26 days ago 285th bricknellj 654 124 18ms 12 Jan 2026 285th btjones0 654 124 10ms 27 days ago 285th ahmetdemirag 🇨🇾 654 124 10ms 25 days ago 285th SirBogman 🇺🇸 654 124 10ms 2 days ago 289th emgordon154 653 79 2ms 27 days ago 290th prestosilver 🇺🇸 651 214 371ms 10 days ago 291st MeWhenI 🇻🇦 650 114 414ms 27 days ago 292nd Natanaelel 🇸🇪 650 150 2ms 24 days ago 293rd KasperKivimaeki 🇫🇮 649 125 10ms 13 Jan 2026 293rd stefangimmillaro 649 125 10ms 27 Feb 2026 293rd Flekay 🇩🇪 649 125 10ms 27 days ago 293rd DialFrost 🇸🇬 649 125 10ms 27 days ago 293rd qpwoeirut 649 125 10ms 25 days ago 298th alexsave 649 129 13ms 27 Feb 2026 299th CaedenHarper 🇨🇦 647 182 412ms 27 Feb 2026 300th solisolu 644 126 10ms 27 Feb 2026 300th guilhem-roy 🇫🇷 644 126 10ms 25 days ago 300th YAJUE114514 644 126 11ms 22 days ago 303rd Natanaelel 🇸🇪 643 109 34ms 17 days ago 304th kasarino 643 207 42ms 5 days ago 305th hiichbindermax 638 127 9ms 27 Feb 2026 305th Matter1024 🇮🇳 638 127 10ms 19 days ago 305th madex 🇩🇪 638 127 10ms 18 days ago 308th kg583 🇺🇸 638 131 10ms 28 Feb 2026 309th JDiLenarda 🇫🇷 633 198 1,328ms 24 days ago 310th quesswho 🇸🇪 629 155 2ms 10 days ago 311th denkyuu1 619 82 41ms 3 days ago 312th msbranicky 619 131 10ms 27 days ago 312th Andrey2001 619 131 10ms 15 days ago 314th Yewzir 🇧🇪 602 123 358ms 19 Nov 2025 315th Protothor 602 139 12ms 27 Feb 2026 316th andrewjc2000 601 135 11ms 19 days ago 317th Shanethegamer 🇺🇸 600 127 310ms 9 Dec 2025 318th bitsandbeyond 🇳🇱 598 171 2ms 19 Nov 2025 319th Shanethegamer 🇺🇸 596 136 31ms 21 Nov 2025 320th moustave 592 137 13ms 19 days ago First Prev 241–320 of 376 Next Last