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?
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 johnnythedoggie 776 532 10ms 31 Mar 2021 721st pecholsjones 776 532 9ms 8 Dec 2021 721st dzybine 776 532 11ms 7 Mar 2022 721st zlohner 776 532 10ms 6 Apr 2022 721st jsvizcaino 776 532 10ms 13 Dec 2022 721st buddyw 776 532 10ms 9 Mar 2023 721st r-i-c-e 776 532 9ms 8 Jul 2023 721st OllyTDev 776 532 9ms 22 Aug 2023 721st 123mjb 776 532 9ms 3 Jan 2024 721st YAJUE114514 776 532 10ms 24 Aug 2025 731st chanyoungs 775 533 10ms 3 Jun 2020 731st atazzam 🇺🇸 775 533 10ms 11 Feb 2023 731st Cynopolis 775 533 10ms 13 Oct 2023 734th david-wiles6 773 534 10ms 23 Jan 2020 734th thomashastings 773 534 11ms 15 Apr 2021 734th ethandhunt 773 534 10ms 20 Jul 2021 734th omri2001 773 534 10ms 22 Oct 2022 734th oceko 773 534 10ms 2 Jan 2023 739th newc0m 772 535 10ms 13 Dec 2018 739th TheMickeyMouse 772 535 10ms 31 Jul 2021 739th Alcancir 772 535 9ms 1 Feb 2022 739th jorisbertram 772 535 10ms 26 Aug 2022 739th sbyrne51 772 535 11ms 1 Oct 2022 739th ridingqwerty 🇺🇸 772 535 10ms 20 Aug 2023 745th louisbosqui 771 536 10ms 28 Dec 2020 745th riviere-lucas 771 536 10ms 28 Dec 2020 745th Magii27 771 536 9ms 3 Dec 2021 745th nullie 771 536 10ms 6 Jun 2022 745th pizie11 771 536 9ms 25 Jun 2023 745th totosuki 771 536 10ms 15 Apr 2024 745th felicksLindgren 771 536 10ms 13 Sep 2024 745th mailboxjpg 771 536 10ms 24 days ago 753rd jotslo 🇬🇧 769 537 10ms 10 Jul 2019 753rd minecire 769 537 10ms 20 Nov 2019 753rd Niitrogen 769 537 10ms 18 Jan 2020 753rd ianpoe 769 537 9ms 14 Mar 2020 753rd pseudonam-gc 769 537 9ms 26 Oct 2022 753rd DeaDvey 769 537 10ms 7 Jul 2023 753rd suzhaoqi 769 537 9ms 21 Aug 2024 760th Querinus 768 538 10ms 29 Nov 2022 760th luca1339 768 538 10ms 30 Mar 2024 760th UwUcifer 768 538 10ms 23 Jul 2025 763rd quasar098 766 539 10ms 16 Mar 2022 763rd ShiniGangrade 766 539 10ms 13 Jul 2022 763rd eshilo-draper 766 539 10ms 11 Oct 2022 763rd emmertgergo 766 539 10ms 12 May 2023 763rd MatthewBarroso 766 539 10ms 19 Dec 2023 763rd GarryYwl 766 539 10ms 21 Jul 2024 763rd Ythaenagor 766 539 10ms 5 Aug 2024 763rd agreegious 766 539 10ms 17 Mar 2025 763rd idaflux 766 539 10ms 4 Jul 2025 763rd wobblybits 766 539 16ms 14 Aug 2025 773rd LukasFolwarczny 🇨🇿 765 540 9ms 17 Sep 2022 773rd FK76exe 765 540 10ms 8 Oct 2022 773rd casmint 765 540 10ms 16 Nov 2022 773rd sgaltair 765 540 10ms 22 Feb 2023 773rd jj4th 765 540 10ms 22 May 2023 773rd eli-siegel 765 540 10ms 27 Jun 2023 773rd Trusly 765 540 9ms 27 Feb 2024 780th connorwagner 763 541 10ms 26 Jun 2018 780th breakingtherabbit 763 541 9ms 14 Jun 2022 780th andre-lameirinhas 🇵🇹 763 541 15ms 12 Oct 2022 780th theonetruenerd 763 541 9ms 27 Aug 2024 780th Naitzirch 🇳🇱 763 541 10ms 3 Jul 2025 785th jhu04 762 542 11ms 6 Jul 2022 785th JasonRaubenheimer 762 542 10ms 25 Nov 2023 785th smothest 762 542 10ms 29 Dec 2023 785th ComputerKWasTaken 🇺🇸 762 542 10ms 31 May 2024 785th MiLk 762 542 13ms 19 Feb 2025 790th derekthatcher 761 543 10ms 24 Sep 2020 790th goolygong 761 543 10ms 20 Nov 2020 790th shinylego 761 543 11ms 19 Oct 2022 790th EthanGrant1 761 543 10ms 29 Dec 2022 790th tlucanti 🇷🇺 761 543 9ms 8 Jan 2024 790th jasonho2582001 761 543 10ms 28 Jun 2024 796th KiwiKoder0123 759 544 9ms 4 Jul 2019 796th Guptacos 759 544 10ms 2 Aug 2020 796th Pargolo 759 544 10ms 7 Oct 2021 796th humz2k 759 544 10ms 5 Jul 2022 796th AharonSambol 759 544 16ms 18 Aug 2023 First Prev 721–800 of 1,167 Next Last
