The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 161st shelerr 509 232 10ms 3 Jul 2022 161st AlephSquirrel 509 232 10ms 3 Jan 2023 161st janlelis 509 232 17ms 25 Aug 2025 164th lenabradley 506 233 9ms 1 Dec 2019 164th tpaxman 🇨🇦 506 233 10ms 15 Dec 2020 166th idoweinstein 504 234 10ms 7 Aug 2022 167th olavaga 502 235 10ms 15 Aug 2021 167th pxeger 🇬🇧 502 235 18ms 18 Mar 2022 169th raspofabs 500 236 10ms 15 Jul 2024 170th mikehanus 498 237 10ms 20 Nov 2023 170th Anonymousellama21 498 237 9ms 6 Mar 2024 170th Johnor12 498 237 10ms 4 Jun 2024 170th fourth-bit 498 237 10ms 27 Jul 2024 174th FranklinJiaChen 496 238 17ms 14 Jun 2024 175th nullie 492 240 17ms 20 Jan 2021 175th kyleclaassen 492 240 10ms 12 Mar 2022 177th stertooy 🇧🇪 490 241 10ms 13 Jun 2024 177th moustave 490 241 10ms 30 Oct 2024 177th DrakeSeteraO 490 241 11ms 12 Nov 2025 180th benson-z 488 242 11ms 3 Dec 2024 181st Crambor 486 243 10ms 9 Jan 2020 181st knutae 🇳🇴 486 243 10ms 29 Nov 2021 183rd daedals 484 244 11ms 25 Apr 2019 183rd dzhang314 484 244 10ms 11 Aug 2019 183rd pique0822 484 244 11ms 1 Jul 2021 183rd TimHuisman1703 484 244 9ms 7 Jan 2022 183rd ZoeyKD 484 244 17ms 13 May 2023 183rd Glinte 484 244 17ms 15 Dec 2023 183rd l-donovan 484 244 10ms 18 Jan 2024 183rd zhaohm14 484 244 10ms 6 Jan 2026 191st Kloppermand 🇩🇰 482 245 10ms 9 Aug 2021 191st amollberg 🇸🇪 482 245 10ms 5 Jan 2022 191st logvp 482 245 10ms 11 Jan 2024 191st ninjaprawn 482 245 10ms 22 days ago 195th jakubtomany 480 246 9ms 20 Apr 2020 195th Powerroff 480 246 12ms 18 Jan 2025 197th sultan 478 247 11ms 13 Jun 2022 197th yishayv 478 247 16ms 18 Jan 2023 197th JorgiEagle 478 247 10ms 8 Feb 2024 197th davecame 478 247 17ms 2 Oct 2025 201st mediocr3 476 248 10ms 11 Aug 2023 201st CommandLeo 🇮🇹 476 248 15ms 26 Dec 2025 203rd suchir 474 249 10ms 5 Jun 2021 203rd bbakersmith 474 249 9ms 19 Jul 2021 203rd Fracture17 474 249 10ms 2 Apr 2023 203rd andrewjc2000 474 249 10ms 14 Jul 2025 203rd erikji 474 249 9ms 28 Jul 2025 203rd YAJUE114514 474 249 9ms 10 Dec 2025 209th SomeKitten 🇺🇸 472 250 10ms 5 Jul 2025 210th tobyLovick 468 252 10ms 7 Dec 2023 211th akhil99 466 253 10ms 14 May 2020 211th BenBanerjeeRichards 466 253 10ms 6 Nov 2021 211th guilhem-roy 🇫🇷 466 253 9ms 23 Feb 2022 211th cefqrn 466 253 11ms 15 May 2023 215th SaagarGodithi 465 254 10ms 10 May 2020 215th kenny14231 465 254 12ms 17 Aug 2022 215th jhpaques 🇫🇷 465 254 11ms 30 Nov 2022 215th rollershutter 465 254 11ms 5 May 2024 215th solisolu 465 254 10ms 17 Oct 2025 220th Vdubro 463 255 10ms 6 Jun 2022 220th ZorblaxV 463 255 10ms 19 Jan 2025 220th LuisGoncalves05 🇵🇹 463 255 11ms 17 Jul 2025 220th AstroOrbis 463 255 17ms 23 Jul 2025 224th try-except-try-accept 🇹🇭 461 256 11ms 27 Jun 2022 224th FomichevAK106 461 256 9ms 29 Sep 2024 226th Ailko 🇧🇪 459 257 16ms 17 Jan 2025 227th EnTerr 457 258 16ms 26 Jun 2024 228th msrawson 456 259 10ms 10 Aug 2018 228th Sakaala 456 259 10ms 24 Apr 2019 228th tomh1012 456 259 11ms 7 Jan 2021 228th NicoAdams 456 259 10ms 30 Dec 2021 228th OllieBoyne 🇬🇧 456 259 10ms 29 Apr 2022 228th Andrey2001 456 259 10ms 1 Feb 2026 234th abailey2020 🇺🇸 454 260 10ms 13 Dec 2020 234th InigoK 🇺🇸 454 260 10ms 26 Sep 2025 234th Matter1024 🇮🇳 454 260 10ms 14 Feb 2026 237th Bonjour27891 🇻🇳 452 261 17ms 13 Mar 2022 237th bwenstar 452 261 11ms 11 Aug 2022 237th MaxElf999 452 261 11ms 28 Sep 2022 237th TaserTheFox 🇺🇸 452 261 17ms 27 Apr 2023 First Prev 161–240 of 1,102 Next Last