The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Ordinal Numbers in Python in bytes. 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 Bytes Time Submitted 157th albanian-laundromat 825 97 13ms 29 Aug 2025 157th Googolplexo 🇷🇺 825 97 13ms 7 hours ago 163rd dzhang314 816 98 12ms 16 Sep 2019 163rd 77Tigers 816 98 12ms 11 Mar 2021 163rd bbakersmith 816 98 13ms 18 Jul 2021 163rd Heathcorp 🇦🇺 816 98 11ms 15 Feb 2022 163rd markus-rekdal 816 98 15ms 10 May 2022 163rd commandz0 🇺🇸 816 98 13ms 9 Sep 2022 163rd Bmrl7 816 98 12ms 4 Mar 2024 163rd alemelis 816 98 13ms 13 Sep 2024 163rd jacekwladzinski 816 98 13ms 7 Oct 2025 163rd LostSyntax21 🇬🇧 816 98 13ms 2 Dec 2025 173rd abailey2020 🇺🇸 808 99 13ms 12 Dec 2020 173rd Indivicivet 808 99 20ms 29 Mar 2021 173rd amollberg 🇸🇪 808 99 12ms 26 Jan 2022 173rd argusdusty 🇺🇸 808 99 13ms 21 Aug 2022 173rd fgrosshans 🇫🇷 808 99 13ms 17 Jul 2024 173rd Artemis21 🇬🇧 808 99 13ms 10 Jan 2025 179th skps2010 800 100 13ms 21 Jul 2019 179th guliyevemil1 🇦🇿 800 100 12ms 16 Apr 2020 179th AdamHe17 800 100 12ms 31 May 2022 179th nullie 800 100 14ms 10 Jun 2022 179th jfallon1997 800 100 14ms 17 Aug 2022 179th StefanHabel 🇨🇦 800 100 13ms 20 Dec 2022 179th thehylian 800 100 12ms 25 Dec 2022 179th ssbhatt4321 800 100 20ms 27 Oct 2023 179th Andriamanitra 🇫🇮 800 100 13ms 20 Jun 2024 188th ian-h-chamberlain 🇺🇸 792 101 12ms 8 Jan 2020 188th LlamaLad7 🇬🇧 792 101 12ms 23 Jan 2021 188th mauro-1 🇮🇹 792 101 12ms 17 Aug 2021 188th za3k 792 101 13ms 12 Oct 2022 192nd petar-donchev 784 102 13ms 26 Aug 2019 192nd jiaminglimjm 🇲🇾 784 102 13ms 12 Dec 2019 192nd Malin001 784 102 12ms 4 Jan 2020 192nd adamcbrown 784 102 13ms 22 Aug 2020 192nd lukasthaler 784 102 13ms 11 Sep 2020 192nd hiddicop 🇸🇪 784 102 11ms 25 Jan 2021 192nd harrymwilkins 🇬🇧 784 102 12ms 20 Jul 2021 192nd sleepyStick 784 102 13ms 8 Dec 2021 192nd Trunksistor 🇫🇷 784 102 13ms 14 Apr 2022 192nd jhpaques 🇫🇷 784 102 13ms 2 Aug 2022 192nd n0Oo0Oo0b 784 102 19ms 28 Dec 2022 192nd yishayv 784 102 13ms 23 Jan 2023 192nd fourth-bit 784 102 13ms 11 Jul 2023 192nd quimey 784 102 12ms 2 Aug 2023 192nd Mabeloid 🇳🇴 784 102 12ms 4 Oct 2024 207th Psirving 777 103 12ms 2 Aug 2020 207th garrisonhh 777 103 13ms 22 Nov 2020 207th AkashTandon167 777 103 12ms 26 Nov 2020 207th NanduBC 777 103 14ms 18 Mar 2021 207th clementblaudeau 777 103 12ms 1 Jun 2021 207th SniperSmiley 🇺🇸 777 103 12ms 23 Jun 2021 207th lemogne 777 103 12ms 10 Aug 2021 207th CedricGebistorf 777 103 13ms 25 Feb 2022 207th knutae 🇳🇴 777 103 14ms 1 Mar 2022 207th petroselo 777 103 12ms 10 Apr 2022 207th b10011 🇫🇮 777 103 13ms 7 Jan 2023 207th DanielPeterssonAI 777 103 13ms 15 Mar 2023 207th Terobero 777 103 20ms 4 Sep 2024 207th luuumine 🇫🇷 777 103 13ms 16 Oct 2025 207th Aquateraneal 🇺🇸 777 103 12ms 19 Feb 2026 222nd rschwa6308 🇺🇸 769 104 13ms 16 Jul 2019 222nd cellobix 769 104 19ms 13 Aug 2019 222nd stordev 769 104 13ms 26 Feb 2021 222nd cubed-guy 769 104 20ms 13 Feb 2022 222nd hiichbindermax 769 104 18ms 25 Feb 2022 222nd TaserTheFox 🇺🇸 769 104 20ms 18 Apr 2023 222nd cros107 🇦🇺 769 104 12ms 17 Jun 2023 222nd Europe2048 769 104 19ms 12 days ago 230th giacomogallina 762 105 16ms 4 Oct 2019 230th SupImDos 762 105 13ms 26 Jun 2020 230th PiterAnnema 762 105 13ms 29 Aug 2020 230th Stockoh 🇫🇷 762 105 13ms 17 Dec 2021 230th Anonymousellama21 762 105 13ms 15 Jun 2022 230th GulgDev 762 105 17ms 21 Mar 2023 230th kaptsanovb 762 105 11ms 31 May 2023 230th jtaxen 762 105 19ms 22 Jun 2023 230th tnecio 762 105 14ms 18 Jun 2024 230th codingisgreatbutiamnot 762 105 19ms 27 Jul 2024 230th starfihs 762 105 13ms 21 Sep 2024 First Prev 161–240 of 473 Next Last
