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 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 714th themoonisacheese 360 528 9ms 29 Dec 2025 714th Languag3 360 528 10ms 26 Jan 2026 723rd RatajVaver 359 529 10ms 13 May 2019 723rd henryishuman 359 529 10ms 23 May 2020 723rd phpboyscout 359 529 10ms 5 Jan 2021 723rd HorseScary 359 529 10ms 16 Nov 2021 723rd lokesh1809 359 529 10ms 3 Dec 2021 728th scottJsonar 358 530 10ms 29 Nov 2019 728th WillowBee7 358 530 10ms 16 Sep 2020 728th jjgry 358 530 10ms 5 Nov 2020 728th GulgDev 358 530 10ms 21 Mar 2023 728th joshua-el-samalouti 🇩🇪 358 530 10ms 26 May 2024 728th jameswmccarty 358 530 10ms 11 Jul 2024 728th SOONwasTaken 358 530 9ms 18 Mar 2025 728th brandongumby 358 530 10ms 8 Jun 2025 728th abhinavuppala 358 530 10ms 18 days ago 737th bwat2 358 531 9ms 27 Dec 2021 737th zyc-2024 🇨🇳 358 531 11ms 30 Dec 2025 737th BenMaydan 358 531 10ms 22 days ago 740th johnnythedoggie 357 532 10ms 31 Mar 2021 740th pecholsjones 357 532 9ms 8 Dec 2021 740th dzybine 357 532 11ms 7 Mar 2022 740th zlohner 357 532 10ms 6 Apr 2022 740th jsvizcaino 357 532 10ms 13 Dec 2022 740th buddyw 357 532 10ms 9 Mar 2023 740th r-i-c-e 357 532 9ms 8 Jul 2023 740th OllyTDev 357 532 9ms 22 Aug 2023 740th 123mjb 357 532 9ms 3 Jan 2024 740th YAJUE114514 357 532 10ms 24 Aug 2025 750th chanyoungs 356 533 10ms 3 Jun 2020 750th atazzam 🇺🇸 356 533 10ms 11 Feb 2023 750th Cynopolis 356 533 10ms 13 Oct 2023 753rd david-wiles6 356 534 10ms 23 Jan 2020 753rd thomashastings 356 534 11ms 15 Apr 2021 753rd ethandhunt 356 534 10ms 20 Jul 2021 753rd omri2001 356 534 10ms 22 Oct 2022 753rd oceko 356 534 10ms 2 Jan 2023 758th newc0m 355 535 10ms 13 Dec 2018 758th TheMickeyMouse 355 535 10ms 31 Jul 2021 758th Alcancir 355 535 9ms 1 Feb 2022 758th jorisbertram 355 535 10ms 26 Aug 2022 758th sbyrne51 355 535 11ms 1 Oct 2022 758th ridingqwerty 🇺🇸 355 535 10ms 20 Aug 2023 764th louisbosqui 354 536 10ms 28 Dec 2020 764th riviere-lucas 354 536 10ms 28 Dec 2020 764th Magii27 354 536 9ms 3 Dec 2021 764th nullie 354 536 10ms 6 Jun 2022 764th pizie11 354 536 9ms 25 Jun 2023 764th totosuki 354 536 10ms 15 Apr 2024 764th felicksLindgren 354 536 10ms 13 Sep 2024 764th mailboxjpg 354 536 10ms 26 Feb 2026 772nd jotslo 🇬🇧 354 537 10ms 10 Jul 2019 772nd minecire 354 537 10ms 20 Nov 2019 772nd Niitrogen 354 537 10ms 18 Jan 2020 772nd ianpoe 354 537 9ms 14 Mar 2020 772nd pseudonam-gc 354 537 9ms 26 Oct 2022 772nd DeaDvey 354 537 10ms 7 Jul 2023 778th Querinus 353 538 10ms 29 Nov 2022 778th luca1339 353 538 10ms 30 Mar 2024 778th UwUcifer 353 538 10ms 23 Jul 2025 781st quasar098 353 539 10ms 16 Mar 2022 781st ShiniGangrade 353 539 10ms 13 Jul 2022 781st eshilo-draper 353 539 10ms 11 Oct 2022 781st emmertgergo 353 539 10ms 12 May 2023 781st MatthewBarroso 353 539 10ms 19 Dec 2023 781st GarryYwl 353 539 10ms 21 Jul 2024 781st Ythaenagor 353 539 10ms 5 Aug 2024 781st idaflux 353 539 10ms 4 Jul 2025 781st wobblybits 353 539 16ms 14 Aug 2025 790th LukasFolwarczny 🇨🇿 352 540 9ms 17 Sep 2022 790th FK76exe 352 540 10ms 8 Oct 2022 790th casmint 352 540 10ms 16 Nov 2022 790th sgaltair 352 540 10ms 22 Feb 2023 790th jj4th 352 540 10ms 22 May 2023 790th eli-siegel 352 540 10ms 27 Jun 2023 790th Trusly 352 540 9ms 27 Feb 2024 797th connorwagner 351 541 10ms 26 Jun 2018 797th breakingtherabbit 351 541 9ms 14 Jun 2022 797th andre-lameirinhas 🇵🇹 351 541 15ms 12 Oct 2022 797th theonetruenerd 351 541 9ms 27 Aug 2024 First Prev 721–800 of 1,170 Next Last
