The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
99 Bottles of Beer 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 641st Icymice 358 330 10ms 16 Mar 2020 641st twrogers1 358 330 10ms 12 Aug 2020 641st SlicesOfficial 358 330 10ms 16 Oct 2021 641st luca1339 358 330 11ms 24 May 2024 645th ejerrard 356 331 9ms 20 Jun 2020 645th LukasFolwarczny 🇨🇿 356 331 10ms 17 Sep 2022 645th wampixel 356 331 15ms 12 Nov 2022 648th DonCharlesLambert 355 332 17ms 21 Feb 2024 648th ioorik 355 332 10ms 6 Mar 2025 650th david-wiles6 354 333 10ms 24 Jan 2020 650th bastienvoirin 🇫🇷 354 333 9ms 28 Nov 2020 650th dzybine 354 333 12ms 7 Mar 2022 650th 2xback 354 333 10ms 3 Feb 2023 650th midnattssol 🇸🇪 354 333 10ms 27 Jul 2023 650th ABC00012345 354 333 11ms 21 Feb 2024 650th TheZwierzLF 🇵🇱 354 333 10ms 22 Nov 2025 650th omicron-4 354 333 10ms 31 Jan 2026 658th ciaranmag 353 334 10ms 25 Jan 2019 658th Malin001 353 334 11ms 3 Jan 2020 658th peterprescott 353 334 10ms 18 Nov 2021 658th piano-miles 353 334 10ms 8 Jan 2023 658th wa1ker38552 353 334 11ms 20 May 2023 658th arjunc12 353 334 9ms 28 Dec 2023 664th frogtd 352 335 18ms 23 Feb 2021 664th joonaspu 352 335 10ms 3 Jun 2023 664th xoxo-ily 352 335 10ms 12 Dec 2023 667th docd 351 336 9ms 7 Aug 2022 667th AbuzarN 351 336 10ms 22 Nov 2023 669th dahrens 350 337 11ms 4 Jul 2019 669th Darkrizen7 350 337 10ms 4 Apr 2020 669th MrFuzz32 350 337 10ms 9 Feb 2021 669th yourlefthandman 350 337 16ms 17 Aug 2023 673rd oAsAo 349 338 11ms 21 Jan 2020 673rd orifu 349 338 10ms 22 Feb 2021 673rd OppositeShark 349 338 10ms 8 Apr 2022 673rd shreyasminocha 349 338 10ms 20 Sep 2022 673rd underscorelior 349 338 10ms 5 Nov 2022 673rd lcubelongren 349 338 11ms 15 Feb 2024 673rd jameswmccarty 349 338 10ms 2 Jan 2025 680th danielwang5 348 339 17ms 1 Aug 2020 680th wrhm 348 339 10ms 12 Dec 2020 680th imtiendat0311 348 339 18ms 14 Apr 2022 680th Lunik 348 339 10ms 7 Nov 2022 680th TJK-S 348 339 10ms 4 Nov 2025 685th fynnkroeger 347 340 10ms 17 Mar 2021 685th nishusb 347 340 10ms 15 Jun 2021 685th vuxlee584 🇻🇳 347 340 10ms 15 Aug 2022 685th WillowBee7 347 340 10ms 1 Jun 2023 685th seejaecee 347 340 9ms 7 Feb 2025 685th HunterC14 347 340 11ms 17 Nov 2025 691st PFischbeck 346 341 10ms 20 Dec 2017 691st TheYMI 346 341 9ms 19 May 2020 691st Bananapants22 346 341 9ms 4 Aug 2022 691st jiji7879 346 341 10ms 20 Jun 2025 695th maxumusprime 345 342 12ms 18 Feb 2020 695th GreenyNeko 345 342 10ms 24 Jul 2020 695th foskaos 345 342 10ms 29 Oct 2023 695th ComputerKWasTaken 🇺🇸 345 342 10ms 9 Jun 2024 695th arjunarya1 345 342 9ms 28 Aug 2025 700th bretthat0 344 343 12ms 28 Dec 2018 700th aazuspan 344 343 10ms 14 May 2022 700th KingSkyrock 🇺🇸 344 343 11ms 5 Nov 2022 700th DrKristoff 344 343 9ms 27 Aug 2024 704th Ibozz91 343 344 10ms 8 Jun 2025 705th tcoard 342 345 10ms 21 Feb 2018 705th aposteriorist 🇨🇦 342 345 9ms 15 Feb 2022 705th Natz12 342 345 10ms 20 Jan 2023 705th peternordby 342 345 10ms 23 Nov 2023 705th Pale-Vessel 342 345 10ms 10 Jan 2024 705th RucatJ 342 345 10ms 17 Apr 2025 711th skibur 341 346 10ms 11 Oct 2019 711th sech1p 🇵🇱 341 346 16ms 4 Jul 2021 711th venividovici 341 346 11ms 17 Nov 2021 711th cameronezell 341 346 11ms 30 May 2022 711th smartiel 341 346 10ms 14 Sep 2022 711th S3BzA 341 346 10ms 30 Aug 2023 717th hymanimy 340 347 17ms 22 Nov 2021 717th DABANANAMAN120 340 347 12ms 2 Aug 2025 719th BrenSchaap 339 348 10ms 22 Oct 2021 719th techieji 339 348 16ms 2 Nov 2021 First Prev 641–720 of 1,100 Next Last
