The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Intersection in Python 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 123rd Matter1024 🇮🇳 608 130 10ms 16 Feb 2026 123rd Andriamanitra 🇫🇮 608 130 11ms 16 Feb 2026 123rd LostSyntax21 🇬🇧 608 130 10ms 21 Feb 2026 123rd RZ781 608 130 10ms 23 Feb 2026 165th bbonenfant 603 131 11ms 21 Nov 2020 165th geofft 603 131 10ms 10 Dec 2020 165th MichaelMBradley 🇨🇦 603 131 10ms 19 Jun 2022 165th b10011 🇫🇮 603 131 11ms 16 Jan 2023 165th starfihs 603 131 10ms 23 Feb 2025 165th dirckvdende 603 131 10ms 11 Jul 2025 165th InigoK 🇺🇸 603 131 11ms 10 Sep 2025 172nd henrytranter 598 132 11ms 9 Oct 2020 172nd andre-lameirinhas 🇵🇹 598 132 10ms 11 Oct 2020 172nd adoxography 598 132 10ms 23 Jan 2021 172nd UBKorkut 598 132 10ms 12 Mar 2021 172nd buffalocat 598 132 11ms 3 May 2021 172nd pascscha 598 132 10ms 13 May 2021 172nd knutae 🇳🇴 598 132 10ms 29 Jun 2021 172nd estomagordo 🇳🇱 598 132 10ms 7 Dec 2021 172nd amollberg 🇸🇪 598 132 10ms 29 Jan 2022 172nd CedricGebistorf 598 132 11ms 6 Mar 2022 172nd cooljoseph1 598 132 11ms 6 May 2022 172nd abba23 598 132 10ms 27 May 2022 172nd nullie 598 132 10ms 8 Jun 2022 172nd georgehulme 598 132 10ms 12 Oct 2022 172nd astonm 598 132 11ms 15 Nov 2022 172nd RDShah 598 132 10ms 23 Nov 2022 172nd myleopard 598 132 10ms 23 Dec 2022 172nd dranjohn 598 132 10ms 11 Sep 2023 172nd dragonshadows07 598 132 10ms 19 Jan 2024 172nd AtengChen 598 132 10ms 17 Aug 2024 172nd maxgodfrey2004 🇨🇦 598 132 11ms 5 Jan 2025 172nd croc54 598 132 11ms 8 Jan 2025 172nd CLOStrophobic 🇮🇹 598 132 10ms 8 Feb 2025 172nd connor-grady 598 132 11ms 7 May 2025 172nd jacekwladzinski 598 132 10ms 5 Oct 2025 172nd Lv0Sys 🇵🇱 598 132 11ms 4 Dec 2025 172nd Natanaelel 🇸🇪 598 132 11ms 16 Feb 2026 172nd bitsandbeyond 🇳🇱 598 132 11ms 16 Feb 2026 172nd madex 🇩🇪 598 132 10ms 16 Feb 2026 172nd D-MOVE 🇵🇭 598 132 10ms 19 Feb 2026 172nd YAJUE114514 598 132 10ms 20 Feb 2026 203rd AGoyet 594 133 10ms 29 Jun 2022 203rd galloj 🇨🇿 594 133 10ms 4 Mar 2023 203rd jfallon1997 594 133 10ms 9 Apr 2024 203rd bknower 594 133 11ms 30 Jun 2025 203rd aalec 594 133 11ms 9 Nov 2025 203rd FoxInTheClouds 594 133 29ms 17 Feb 2026 203rd Googolplexo 🇷🇺 594 133 11ms 29 hours ago 210th badouralix 590 134 10ms 18 Mar 2021 210th NicholasSeward 590 134 21ms 9 Sep 2021 210th quimey 590 134 10ms 23 Mar 2023 210th TaserTheFox 🇺🇸 590 134 11ms 24 Mar 2023 210th cros107 🇦🇺 590 134 10ms 3 Jun 2023 210th namelessiw 590 134 11ms 15 Jan 2024 210th brimstonetrader 590 134 11ms 22 Jan 2024 210th mrmena 🇦🇺 590 134 10ms 27 Mar 2024 210th EnTerr 590 134 10ms 1 Sep 2024 210th andrewjc2000 590 134 10ms 9 Mar 2025 220th argusdusty 🇺🇸 585 135 10ms 25 Dec 2020 220th boxjelly 585 135 11ms 10 Feb 2021 220th sleepyStick 585 135 10ms 11 Mar 2022 220th smartiel 585 135 21ms 14 Sep 2022 220th trist224 🇫🇷 585 135 43ms 21 Sep 2022 220th randolchance 585 135 10ms 29 Dec 2022 220th Code-Coder-coder 585 135 10ms 24 Nov 2025 220th weeble 585 135 10ms 22 Feb 2026 220th Aquateraneal 🇺🇸 585 135 11ms 8 days ago 229th david-ds 581 136 10ms 18 Mar 2021 229th hyperneutrino 581 136 17ms 28 Jun 2021 229th guilhem-roy 🇫🇷 581 136 10ms 23 Feb 2022 229th Terobero 581 136 10ms 2 Sep 2024 229th Pyroan 581 136 11ms 16 May 2025 229th Emutis 🇱🇹 581 136 11ms 30 Aug 2025 229th Bmrl7 581 136 10ms 25 Dec 2025 229th Openstreetmapler 581 136 11ms 16 Feb 2026 237th MarcMush 🇫🇷 577 137 10ms 9 Jul 2021 237th bob-th 577 137 10ms 19 Jul 2022 237th FrancoisXavierDecroix 577 137 10ms 16 Apr 2024 237th FranklinJiaChen 577 137 11ms 5 Aug 2024 First Prev 161–240 of 399 Next Last
