The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 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 error256 685 122 8ms 4 days ago 242nd MeWhenI 🇻🇦 680 102 1ms 18 days ago 243rd GolfingSuccess 🇬🇷 679 109 445ms 24 days ago 244th Herbert00709 🇵🇱 679 179 1,389ms 18 days ago 245th MeWhenI 🇻🇦 677 144 2ms 18 days ago 245th xiaoyiming123 677 144 2ms 5 days ago 247th ovs-code 🇩🇪 673 110 422ms 21 Nov 2025 247th sean-niemann 🇺🇸 673 110 434ms 16 Jan 2026 247th AlephSquirrel 673 110 433ms 31 Jan 2026 250th elgan65536 🇺🇸 671 231 222ms 9 Feb 2026 251st NickTheEASDude 🇺🇸 669 153 2ms 14 days ago 252nd Lv0Sys 🇵🇱 668 76 35ms 23 days ago 253rd CaedenHarper 🇨🇦 667 111 400ms 25 days ago 254th albanian-laundromat 667 209 397ms 18 days ago 255th GolfingSuccess 🇬🇷 659 123 10ms 19 Nov 2025 255th Yewzir 🇧🇪 659 123 11ms 19 Nov 2025 255th AlephSquirrel 659 123 29ms 19 Nov 2025 255th Natanaelel 🇸🇪 659 123 10ms 19 Nov 2025 255th ovs-code 🇩🇪 659 123 10ms 19 Nov 2025 255th 4atj 659 123 10ms 27 Nov 2025 255th bizy-coder 659 123 11ms 28 Nov 2025 255th 5cw 🇺🇸 659 123 10ms 6 Dec 2025 255th HPWiz 🇳🇿 659 123 10ms 17 Dec 2025 255th davecame 659 123 10ms 17 Dec 2025 255th blaztoma 🇱🇹 659 123 10ms 25 days ago 255th edsrzf 🇳🇿 659 123 10ms 25 days ago 255th zacjl 659 123 30ms 25 days ago 255th StefanHabel 🇨🇦 659 123 9ms 23 days ago 255th Lv0Sys 🇵🇱 659 123 10ms 23 days ago 255th commandz0 🇺🇸 659 123 10ms 23 days ago 255th Emutis 🇱🇹 659 123 10ms 23 days ago 255th MeWhenI 🇻🇦 659 123 14ms 22 days ago 255th m-tkach 🇺🇦 659 123 10ms 21 days ago 255th sisyphus-ppcg 🇦🇺 659 123 11ms 13 days ago 255th orthoplex 🇨🇽 659 123 10ms 11 days ago 255th duckyluuk 🇳🇱 659 123 30ms 2 days ago 277th rucin93 🇵🇱 658 106 166ms 21 days ago 278th arcpolaris 658 179 453ms 117 mins ago 279th tomh1012 655 180 532ms 21 days ago 280th bricknellj 654 124 18ms 12 Jan 2026 280th btjones0 654 124 10ms 22 days ago 280th ahmetdemirag 🇨🇾 654 124 10ms 20 days ago 283rd emgordon154 651 79 2ms 22 days ago 284th prestosilver 🇺🇸 651 214 371ms 5 days ago 285th MeWhenI 🇻🇦 650 114 414ms 22 days ago 286th Natanaelel 🇸🇪 650 150 2ms 19 days ago 287th KasperKivimaeki 🇫🇮 649 125 10ms 13 Jan 2026 287th stefangimmillaro 649 125 10ms 24 days ago 287th Flekay 🇩🇪 649 125 10ms 22 days ago 287th DialFrost 🇸🇬 649 125 10ms 22 days ago 287th qpwoeirut 649 125 10ms 20 days ago 292nd alexsave 649 129 11ms 24 days ago 293rd CaedenHarper 🇨🇦 647 182 412ms 24 days ago 294th Natanaelel 🇸🇪 643 109 34ms 12 days ago 295th solisolu 643 126 10ms 23 days ago 295th guilhem-roy 🇫🇷 643 126 10ms 21 days ago 295th YAJUE114514 643 126 11ms 17 days ago 298th kasarino 643 207 42ms 5 hours ago 299th hiichbindermax 638 127 9ms 24 days ago 299th Matter1024 🇮🇳 638 127 10ms 14 days ago 299th madex 🇩🇪 638 127 10ms 13 days ago 302nd kg583 🇺🇸 638 131 10ms 23 days ago 303rd JDiLenarda 🇫🇷 633 198 1,328ms 19 days ago 304th quesswho 🇸🇪 629 155 2ms 5 days ago 305th msbranicky 619 131 10ms 22 days ago 305th Andrey2001 619 131 10ms 10 days ago 307th Yewzir 🇧🇪 602 123 358ms 19 Nov 2025 308th Protothor 602 139 15ms 24 days ago 309th andrewjc2000 601 135 11ms 14 days ago 310th Shanethegamer 🇺🇸 600 127 310ms 9 Dec 2025 311th bitsandbeyond 🇳🇱 598 171 2ms 19 Nov 2025 312th Shanethegamer 🇺🇸 596 136 31ms 21 Nov 2025 313th moustave 592 137 13ms 14 days ago 314th Shanethegamer 🇺🇸 591 86 36ms 7 Dec 2025 315th bitsandbeyond 🇳🇱 590 155 5ms 4 Dec 2025 316th ZakkkkAttackkkk 🇵🇭 579 140 30ms 15 days ago 317th denkyuu1 577 88 37ms 14 days ago 318th Aquateraneal 🇺🇸 575 141 21ms 2 days ago 319th KatieLG 🇬🇧 571 89 37ms 24 days ago 320th Shanethegamer 🇺🇸 570 130 429ms 22 Nov 2025 First Prev 241–320 of 370 Next Last