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?
12 Days of Christmas 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 76th InigoK 🇺🇸 417 456 10ms 10 Oct 2025 76th plcc0 417 456 9ms 31 Jan 2026 83rd Haksell 🇦🇶 416 457 10ms 4 Feb 2021 83rd solisolu 416 457 10ms 21 days ago 85th lordnord 415 458 10ms 2 May 2020 85th davitf 415 458 10ms 7 May 2020 85th knutae 🇳🇴 415 458 9ms 9 Feb 2022 85th M0PKOBKA 415 458 9ms 27 Dec 2022 85th drochom 415 458 10ms 16 Jun 2024 85th fourth-bit 415 458 10ms 25 Sep 2024 91st magnickolas 414 459 10ms 30 Aug 2020 91st Shanethegamer 🇺🇸 414 459 10ms 11 Mar 2022 91st QuincyNash 🇺🇸 414 459 10ms 29 Nov 2022 91st keelimeguy 🇺🇸 414 459 30ms 25 Dec 2023 91st Liniarc 414 459 9ms 21 Nov 2024 91st cefqrn 414 459 9ms 18 Jan 2025 91st dirckvdende 414 459 10ms 29 Jun 2025 98th marcin7Cd 413 460 9ms 11 Dec 2020 98th RYNO8 413 460 10ms 29 Aug 2021 98th lucasvazq 🇦🇷 413 460 9ms 20 Mar 2022 98th jz268 413 460 10ms 6 Jul 2022 98th tooningelaere 413 460 10ms 4 Dec 2022 98th Fracture17 413 460 10ms 2 Apr 2023 98th dscholtz-lab49 413 460 10ms 15 May 2023 98th ndren 413 460 31ms 23 Dec 2023 98th CommandLeo 🇮🇹 413 460 10ms 4 Oct 2025 107th Faweks1 412 461 10ms 3 Aug 2018 107th elldur 412 461 10ms 17 Mar 2019 107th ludwig-n 412 461 9ms 7 Apr 2021 107th Indivicivet 412 461 9ms 26 Oct 2021 107th sultan 412 461 31ms 7 Jun 2022 107th idavidka 🇭🇺 412 461 10ms 17 May 2023 107th driri85 412 461 34ms 16 Feb 2024 107th kalex 412 461 9ms 17 Jul 2024 115th daedals 411 462 10ms 19 Jun 2019 115th xbjfk 411 462 10ms 25 Nov 2020 115th tpaxman 🇨🇦 411 462 10ms 15 Dec 2020 115th myleopard 411 462 10ms 29 Jan 2021 115th inventshah 411 462 10ms 27 Apr 2022 115th Edjyzod 411 462 10ms 3 Oct 2022 115th apreg 411 462 10ms 1 Jun 2023 115th emgordon154 411 462 11ms 14 Apr 2025 115th AnAwesomGuy 411 462 9ms 21 Dec 2025 124th Fishron 410 463 10ms 28 Dec 2021 124th TaserTheFox 🇺🇸 410 463 11ms 27 Apr 2023 124th jeff-at-tamer-dot-codes 🇺🇸 410 463 10ms 31 May 2023 124th JasonMcCallion 410 463 29ms 20 Dec 2023 124th CaedenHarper 🇨🇦 410 463 10ms 24 Jul 2024 124th jatloe 410 463 9ms 23 Oct 2024 124th snydej 410 463 9ms 29 Dec 2024 131st dzhang314 409 464 10ms 14 Aug 2019 131st DialFrost 🇸🇬 409 464 10ms 9 Feb 2023 131st eiburns 409 464 10ms 26 Oct 2023 131st kurkale6ka 409 464 9ms 3 Dec 2023 131st Vaekor 409 464 10ms 7 Feb 2024 131st l-donovan 409 464 11ms 27 Jun 2024 131st FortuiteMan 🇫🇷 409 464 10ms 17 Oct 2024 131st vhoulbreque 🇫🇷 409 464 11ms 30 Nov 2025 131st KatieLG 🇬🇧 409 464 9ms 9 Jan 2026 140th stordev 409 465 11ms 26 Feb 2021 140th omkarjois 409 465 10ms 17 Oct 2021 140th rickypoon 409 465 10ms 22 Jul 2022 140th DrPiranoid 409 465 10ms 26 Sep 2022 140th joll05 🇸🇪 409 465 10ms 1 Nov 2022 140th SirBogman 🇺🇸 409 465 10ms 5 Jan 2023 140th ehulinsky 🇺🇸 409 465 10ms 7 May 2023 140th erikji 409 465 9ms 3 Feb 2025 140th CornerMercury 🇬🇧 409 465 10ms 26 Oct 2025 149th lrustand 408 466 9ms 3 Feb 2018 149th TobyBoyne 🇬🇧 408 466 9ms 1 Jun 2019 149th RDShah 408 466 10ms 2 Feb 2020 149th dim-an 408 466 10ms 8 Dec 2020 149th OllieBoyne 🇬🇧 408 466 9ms 31 Dec 2020 149th ihalseide 🇺🇸 408 466 9ms 5 Jun 2021 149th Anonymousellama21 408 466 9ms 9 May 2022 149th jakobkordez 🇸🇮 408 466 9ms 19 Oct 2022 149th CatsAreFluffy 408 466 10ms 18 Dec 2022 149th PaulMWeiser 408 466 10ms 25 Mar 2023 149th MWI-polygolf 408 466 11ms 6 Dec 2023 149th logvp 408 466 10ms 12 Jan 2024 First Prev 81–160 of 1,169 Next Last
