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 chars. 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 Chars Time Submitted 713th Languag3 360 528 10ms 26 Jan 2026 722nd RatajVaver 359 529 10ms 13 May 2019 722nd henryishuman 359 529 10ms 23 May 2020 722nd phpboyscout 359 529 10ms 5 Jan 2021 722nd HorseScary 359 529 10ms 16 Nov 2021 722nd lokesh1809 359 529 10ms 3 Dec 2021 727th scottJsonar 358 530 10ms 29 Nov 2019 727th WillowBee7 358 530 10ms 16 Sep 2020 727th jjgry 358 530 10ms 5 Nov 2020 727th GulgDev 358 530 10ms 21 Mar 2023 727th joshua-el-samalouti 🇩🇪 358 530 10ms 26 May 2024 727th jameswmccarty 358 530 10ms 11 Jul 2024 727th SOONwasTaken 358 530 9ms 18 Mar 2025 727th brandongumby 358 530 10ms 8 Jun 2025 727th abhinavuppala 358 530 10ms 17 days ago 736th bwat2 358 531 9ms 27 Dec 2021 736th zyc-2024 🇨🇳 358 531 11ms 30 Dec 2025 736th BenMaydan 358 531 10ms 22 days ago 739th johnnythedoggie 357 532 10ms 31 Mar 2021 739th pecholsjones 357 532 9ms 8 Dec 2021 739th dzybine 357 532 11ms 7 Mar 2022 739th zlohner 357 532 10ms 6 Apr 2022 739th jsvizcaino 357 532 10ms 13 Dec 2022 739th buddyw 357 532 10ms 9 Mar 2023 739th r-i-c-e 357 532 9ms 8 Jul 2023 739th OllyTDev 357 532 9ms 22 Aug 2023 739th 123mjb 357 532 9ms 3 Jan 2024 739th YAJUE114514 357 532 10ms 24 Aug 2025 749th chanyoungs 356 533 10ms 3 Jun 2020 749th atazzam 🇺🇸 356 533 10ms 11 Feb 2023 749th Cynopolis 356 533 10ms 13 Oct 2023 752nd david-wiles6 356 534 10ms 23 Jan 2020 752nd thomashastings 356 534 11ms 15 Apr 2021 752nd ethandhunt 356 534 10ms 20 Jul 2021 752nd omri2001 356 534 10ms 22 Oct 2022 752nd oceko 356 534 10ms 2 Jan 2023 757th newc0m 355 535 10ms 13 Dec 2018 757th TheMickeyMouse 355 535 10ms 31 Jul 2021 757th Alcancir 355 535 9ms 1 Feb 2022 757th jorisbertram 355 535 10ms 26 Aug 2022 757th sbyrne51 355 535 11ms 1 Oct 2022 757th ridingqwerty 🇺🇸 355 535 10ms 20 Aug 2023 763rd louisbosqui 354 536 10ms 28 Dec 2020 763rd riviere-lucas 354 536 10ms 28 Dec 2020 763rd Magii27 354 536 9ms 3 Dec 2021 763rd nullie 354 536 10ms 6 Jun 2022 763rd pizie11 354 536 9ms 25 Jun 2023 763rd totosuki 354 536 10ms 15 Apr 2024 763rd felicksLindgren 354 536 10ms 13 Sep 2024 763rd mailboxjpg 354 536 10ms 26 Feb 2026 771st jotslo 🇬🇧 354 537 10ms 10 Jul 2019 771st minecire 354 537 10ms 20 Nov 2019 771st Niitrogen 354 537 10ms 18 Jan 2020 771st ianpoe 354 537 9ms 14 Mar 2020 771st pseudonam-gc 354 537 9ms 26 Oct 2022 771st DeaDvey 354 537 10ms 7 Jul 2023 777th Querinus 353 538 10ms 29 Nov 2022 777th luca1339 353 538 10ms 30 Mar 2024 777th UwUcifer 353 538 10ms 23 Jul 2025 780th quasar098 353 539 10ms 16 Mar 2022 780th ShiniGangrade 353 539 10ms 13 Jul 2022 780th eshilo-draper 353 539 10ms 11 Oct 2022 780th emmertgergo 353 539 10ms 12 May 2023 780th MatthewBarroso 353 539 10ms 19 Dec 2023 780th GarryYwl 353 539 10ms 21 Jul 2024 780th Ythaenagor 353 539 10ms 5 Aug 2024 780th idaflux 353 539 10ms 4 Jul 2025 780th wobblybits 353 539 16ms 14 Aug 2025 789th LukasFolwarczny 🇨🇿 352 540 9ms 17 Sep 2022 789th FK76exe 352 540 10ms 8 Oct 2022 789th casmint 352 540 10ms 16 Nov 2022 789th sgaltair 352 540 10ms 22 Feb 2023 789th jj4th 352 540 10ms 22 May 2023 789th eli-siegel 352 540 10ms 27 Jun 2023 789th Trusly 352 540 9ms 27 Feb 2024 796th connorwagner 351 541 10ms 26 Jun 2018 796th breakingtherabbit 351 541 9ms 14 Jun 2022 796th andre-lameirinhas 🇵🇹 351 541 15ms 12 Oct 2022 796th theonetruenerd 351 541 9ms 27 Aug 2024 796th schmop 351 541 10ms 15 hours ago First Prev 721–800 of 1,169 Next Last
