The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 hours. 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 721st bwat2 778 531 9ms 27 Dec 2021 721st zyc-2024 🇨🇳 778 531 11ms 30 Dec 2025 721st BenMaydan 778 531 10ms 24 days ago 724th johnnythedoggie 776 532 10ms 31 Mar 2021 724th pecholsjones 776 532 9ms 8 Dec 2021 724th dzybine 776 532 10ms 7 Mar 2022 724th zlohner 776 532 10ms 6 Apr 2022 724th jsvizcaino 776 532 10ms 13 Dec 2022 724th buddyw 776 532 10ms 9 Mar 2023 724th r-i-c-e 776 532 9ms 8 Jul 2023 724th OllyTDev 776 532 9ms 22 Aug 2023 724th 123mjb 776 532 9ms 3 Jan 2024 724th YAJUE114514 776 532 10ms 24 Aug 2025 734th chanyoungs 775 533 10ms 3 Jun 2020 734th atazzam 🇺🇸 775 533 9ms 11 Feb 2023 734th Cynopolis 775 533 9ms 13 Oct 2023 737th david-wiles6 773 534 10ms 23 Jan 2020 737th thomashastings 773 534 11ms 15 Apr 2021 737th ethandhunt 773 534 10ms 20 Jul 2021 737th omri2001 773 534 10ms 22 Oct 2022 737th oceko 773 534 10ms 2 Jan 2023 742nd newc0m 772 535 10ms 13 Dec 2018 742nd TheMickeyMouse 772 535 10ms 31 Jul 2021 742nd Alcancir 772 535 9ms 1 Feb 2022 742nd jorisbertram 772 535 10ms 26 Aug 2022 742nd sbyrne51 772 535 11ms 1 Oct 2022 742nd ridingqwerty 🇺🇸 772 535 10ms 20 Aug 2023 748th louisbosqui 771 536 10ms 28 Dec 2020 748th riviere-lucas 771 536 10ms 28 Dec 2020 748th Magii27 771 536 9ms 3 Dec 2021 748th nullie 771 536 10ms 6 Jun 2022 748th pizie11 771 536 9ms 25 Jun 2023 748th totosuki 771 536 10ms 15 Apr 2024 748th felicksLindgren 771 536 10ms 13 Sep 2024 748th mailboxjpg 771 536 10ms 26 Feb 2026 756th jotslo 🇬🇧 769 537 10ms 10 Jul 2019 756th minecire 769 537 10ms 20 Nov 2019 756th Niitrogen 769 537 10ms 18 Jan 2020 756th ianpoe 769 537 9ms 14 Mar 2020 756th pseudonam-gc 769 537 9ms 26 Oct 2022 756th DeaDvey 769 537 10ms 7 Jul 2023 756th suzhaoqi 769 537 9ms 21 Aug 2024 763rd Querinus 768 538 10ms 29 Nov 2022 763rd luca1339 768 538 10ms 30 Mar 2024 763rd UwUcifer 768 538 10ms 23 Jul 2025 766th quasar098 766 539 10ms 16 Mar 2022 766th ShiniGangrade 766 539 10ms 13 Jul 2022 766th eshilo-draper 766 539 10ms 11 Oct 2022 766th emmertgergo 766 539 10ms 12 May 2023 766th MatthewBarroso 766 539 10ms 19 Dec 2023 766th GarryYwl 766 539 10ms 21 Jul 2024 766th Ythaenagor 766 539 10ms 5 Aug 2024 766th agreegious 766 539 10ms 17 Mar 2025 766th idaflux 766 539 10ms 4 Jul 2025 766th wobblybits 766 539 16ms 14 Aug 2025 776th LukasFolwarczny 🇨🇿 765 540 9ms 17 Sep 2022 776th FK76exe 765 540 10ms 8 Oct 2022 776th casmint 765 540 10ms 16 Nov 2022 776th sgaltair 765 540 10ms 22 Feb 2023 776th jj4th 765 540 10ms 22 May 2023 776th eli-siegel 765 540 10ms 27 Jun 2023 776th Trusly 765 540 9ms 27 Feb 2024 783rd connorwagner 763 541 10ms 26 Jun 2018 783rd breakingtherabbit 763 541 9ms 14 Jun 2022 783rd andre-lameirinhas 🇵🇹 763 541 15ms 12 Oct 2022 783rd theonetruenerd 763 541 9ms 27 Aug 2024 783rd Naitzirch 🇳🇱 763 541 10ms 3 Jul 2025 783rd schmop 763 541 10ms 3 days ago 789th jhu04 762 542 11ms 6 Jul 2022 789th JasonRaubenheimer 762 542 10ms 25 Nov 2023 789th smothest 762 542 10ms 29 Dec 2023 789th ComputerKWasTaken 🇺🇸 762 542 10ms 31 May 2024 789th MiLk 762 542 10ms 19 Feb 2025 794th derekthatcher 761 543 10ms 24 Sep 2020 794th goolygong 761 543 10ms 20 Nov 2020 794th shinylego 761 543 11ms 19 Oct 2022 794th EthanGrant1 761 543 10ms 29 Dec 2022 794th tlucanti 🇷🇺 761 543 9ms 8 Jan 2024 794th jasonho2582001 761 543 10ms 28 Jun 2024 800th KiwiKoder0123 759 544 9ms 4 Jul 2019 First Prev 721–800 of 1,171 Next Last
