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 318th adamnielson42 🇺🇸 421 280 11ms 12 May 2023 318th JudeTyrrell 421 280 10ms 5 Oct 2024 318th croc54 421 280 16ms 22 Dec 2024 318th Coolbeansyeah 421 280 11ms 18 Feb 2026 325th SpeedyNinja 420 281 17ms 20 Oct 2020 325th itsbjoern 420 281 10ms 11 Dec 2020 325th SimonSieber 420 281 17ms 25 Nov 2022 325th smilesformiles3 420 281 10ms 11 Jun 2025 325th davidludwik2370 420 281 18ms 19 days ago 330th myfatemi04 418 282 10ms 11 Jan 2018 330th bkshrader 418 282 16ms 11 Jan 2019 330th buffalocat 418 282 10ms 3 May 2021 330th celiendonze 🇨🇭 418 282 10ms 22 Jun 2023 330th msbranicky 418 282 17ms 25 Jul 2023 330th AbhilashaTandon 418 282 10ms 21 Sep 2023 336th dymowski 417 283 11ms 12 Jul 2019 336th clementblaudeau 417 283 17ms 1 Jun 2021 336th hiichbindermax 417 283 10ms 25 Feb 2022 336th Xzyaihni 417 283 17ms 16 Jan 2024 336th codingisgreatbutiamnot 417 283 9ms 14 Jul 2024 336th OSYCh314 🇦🇺 417 283 10ms 21 Nov 2024 336th p214974_edj 417 283 10ms 17 Sep 2025 343rd tzlils 415 284 10ms 25 Mar 2023 343rd quimey 415 284 10ms 21 Jul 2023 343rd VictorStenvers 🇳🇱 415 284 10ms 2 Oct 2024 343rd xiaoyiming123 415 284 10ms 13 Aug 2025 347th mmniaziqb 414 285 17ms 15 May 2018 347th 77Tigers 414 285 16ms 7 Feb 2021 347th CedricGebistorf 414 285 10ms 11 Mar 2022 347th AlexanderFair 414 285 10ms 20 Jul 2023 347th kbeat 🇰🇿 414 285 10ms 18 May 2025 347th Luke44565 414 285 16ms 25 Jun 2025 347th wobblybits 414 285 10ms 16 Aug 2025 354th sawall 413 286 17ms 17 Aug 2019 354th JackGiffordRA 413 286 10ms 12 Jun 2020 354th Dazza314 🇬🇧 413 286 10ms 1 Nov 2020 354th dtaylor0 413 286 17ms 25 Dec 2022 354th bobbysq 413 286 9ms 2 May 2023 354th RobertHoeh 413 286 16ms 5 Dec 2023 354th yousefalizadeh 413 286 9ms 3 Apr 2024 354th santiagvalencia 413 286 17ms 29 Apr 2025 362nd MichaelMBradley 🇨🇦 411 287 17ms 26 Feb 2022 362nd Wildst 411 287 9ms 20 Jul 2022 362nd starfihs 411 287 10ms 1 Mar 2025 362nd vhoulbreque 🇫🇷 411 287 9ms 28 Nov 2025 366th myleopard 410 288 17ms 29 Jan 2021 367th stordev 408 289 11ms 26 Feb 2021 367th scpchicken 🇵🇼 408 289 13ms 12 Mar 2022 367th GulgDev 408 289 11ms 22 Mar 2023 367th M4rc0g1 408 289 10ms 15 Nov 2025 371st TheAristos 407 290 10ms 25 Oct 2019 371st itiievskyi 🇺🇦 407 290 10ms 10 Aug 2020 371st dzshn 407 290 10ms 25 Nov 2020 371st firegene 🇮🇪 407 290 17ms 1 Apr 2023 371st markusgraube 407 290 11ms 13 Apr 2023 371st lelbal 407 290 10ms 15 Sep 2025 371st FoxInTheClouds 407 290 10ms 8 Feb 2026 378th ari-gutierrez 405 291 10ms 23 Oct 2018 378th AkashTandon167 405 291 9ms 19 Jan 2021 378th julienlamoureux78 405 291 11ms 17 Aug 2022 378th drewburr 405 291 11ms 28 Nov 2022 378th BenjaminHGong 405 291 10ms 22 Jan 2024 383rd zdzc 404 292 10ms 3 Mar 2018 383rd Trunksistor 🇫🇷 404 292 11ms 8 Apr 2022 383rd mrnomm 404 292 10ms 12 Aug 2022 383rd SubsTheTechnomancer 404 292 10ms 27 Feb 2023 383rd eddvrs 404 292 10ms 21 Dec 2023 383rd jacekwladzinski 404 292 10ms 4 Oct 2025 383rd Nikinator2704 404 292 18ms 31 Oct 2025 383rd mossiegoat 404 292 10ms 28 Jan 2026 391st guliyevemil1 🇦🇿 403 293 9ms 16 Apr 2020 391st NanduBC 403 293 12ms 17 Mar 2021 391st Jaydosu 403 293 11ms 22 Oct 2021 391st 5space 403 293 10ms 13 Apr 2022 391st 6lr61 403 293 10ms 1 Dec 2022 391st sandorstormen 403 293 9ms 11 Mar 2023 391st KadinSchultz 403 293 10ms 38 hours ago 398th ionutm82 401 294 16ms 12 Nov 2018 398th decorator-factory 401 294 9ms 19 May 2019 398th wrjv 401 294 10ms 7 Jul 2021 First Prev 321–400 of 1,102 Next Last
