The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 43 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 720th zyc-2024 🇨🇳 358 531 11ms 30 Dec 2025 720th BenMaydan 358 531 10ms 22 days ago 723rd johnnythedoggie 357 532 10ms 31 Mar 2021 723rd pecholsjones 357 532 9ms 8 Dec 2021 723rd dzybine 357 532 11ms 7 Mar 2022 723rd zlohner 357 532 10ms 6 Apr 2022 723rd jsvizcaino 357 532 10ms 13 Dec 2022 723rd buddyw 357 532 10ms 9 Mar 2023 723rd r-i-c-e 357 532 9ms 8 Jul 2023 723rd OllyTDev 357 532 9ms 22 Aug 2023 723rd 123mjb 357 532 9ms 3 Jan 2024 723rd YAJUE114514 357 532 10ms 24 Aug 2025 733rd chanyoungs 356 533 10ms 3 Jun 2020 733rd atazzam 🇺🇸 356 533 10ms 11 Feb 2023 733rd Cynopolis 356 533 10ms 13 Oct 2023 736th david-wiles6 356 534 10ms 23 Jan 2020 736th thomashastings 356 534 11ms 15 Apr 2021 736th ethandhunt 356 534 10ms 20 Jul 2021 736th omri2001 356 534 10ms 22 Oct 2022 736th oceko 356 534 10ms 2 Jan 2023 741st newc0m 355 535 10ms 13 Dec 2018 741st TheMickeyMouse 355 535 10ms 31 Jul 2021 741st Alcancir 355 535 9ms 1 Feb 2022 741st jorisbertram 355 535 10ms 26 Aug 2022 741st sbyrne51 355 535 11ms 1 Oct 2022 741st ridingqwerty 🇺🇸 355 535 10ms 20 Aug 2023 747th louisbosqui 354 536 10ms 28 Dec 2020 747th riviere-lucas 354 536 10ms 28 Dec 2020 747th Magii27 354 536 9ms 3 Dec 2021 747th nullie 354 536 10ms 6 Jun 2022 747th pizie11 354 536 9ms 25 Jun 2023 747th totosuki 354 536 10ms 15 Apr 2024 747th felicksLindgren 354 536 10ms 13 Sep 2024 747th mailboxjpg 354 536 10ms 26 Feb 2026 755th jotslo 🇬🇧 354 537 10ms 10 Jul 2019 755th minecire 354 537 10ms 20 Nov 2019 755th Niitrogen 354 537 10ms 18 Jan 2020 755th ianpoe 354 537 9ms 14 Mar 2020 755th pseudonam-gc 354 537 9ms 26 Oct 2022 755th DeaDvey 354 537 10ms 7 Jul 2023 755th suzhaoqi 354 537 9ms 21 Aug 2024 762nd Querinus 353 538 10ms 29 Nov 2022 762nd luca1339 353 538 10ms 30 Mar 2024 762nd UwUcifer 353 538 10ms 23 Jul 2025 765th quasar098 353 539 10ms 16 Mar 2022 765th ShiniGangrade 353 539 10ms 13 Jul 2022 765th eshilo-draper 353 539 10ms 11 Oct 2022 765th emmertgergo 353 539 10ms 12 May 2023 765th MatthewBarroso 353 539 10ms 19 Dec 2023 765th GarryYwl 353 539 10ms 21 Jul 2024 765th Ythaenagor 353 539 10ms 5 Aug 2024 765th agreegious 353 539 10ms 17 Mar 2025 765th idaflux 353 539 10ms 4 Jul 2025 765th wobblybits 353 539 16ms 14 Aug 2025 775th LukasFolwarczny 🇨🇿 352 540 9ms 17 Sep 2022 775th FK76exe 352 540 10ms 8 Oct 2022 775th casmint 352 540 10ms 16 Nov 2022 775th sgaltair 352 540 10ms 22 Feb 2023 775th jj4th 352 540 10ms 22 May 2023 775th eli-siegel 352 540 10ms 27 Jun 2023 775th Trusly 352 540 9ms 27 Feb 2024 782nd connorwagner 351 541 10ms 26 Jun 2018 782nd breakingtherabbit 351 541 9ms 14 Jun 2022 782nd andre-lameirinhas 🇵🇹 351 541 15ms 12 Oct 2022 782nd theonetruenerd 351 541 9ms 27 Aug 2024 782nd Naitzirch 🇳🇱 351 541 10ms 3 Jul 2025 782nd schmop 351 541 10ms 33 hours ago 788th jhu04 351 542 11ms 6 Jul 2022 788th JasonRaubenheimer 351 542 10ms 25 Nov 2023 788th smothest 351 542 10ms 29 Dec 2023 788th ComputerKWasTaken 🇺🇸 351 542 10ms 31 May 2024 788th MiLk 351 542 13ms 19 Feb 2025 793rd derekthatcher 350 543 10ms 24 Sep 2020 793rd goolygong 350 543 10ms 20 Nov 2020 793rd shinylego 350 543 11ms 19 Oct 2022 793rd EthanGrant1 350 543 10ms 29 Dec 2022 793rd tlucanti 🇷🇺 350 543 9ms 8 Jan 2024 793rd jasonho2582001 350 543 10ms 28 Jun 2024 799th KiwiKoder0123 349 544 9ms 4 Jul 2019 799th Guptacos 349 544 10ms 2 Aug 2020 First Prev 721–800 of 1,170 Next Last
