The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 561st RyanCarrusca 375 315 11ms 21 Feb 2019 561st volpi-m 🇫🇷 375 315 17ms 30 Aug 2020 561st doppelar0n 🇩🇪 375 315 10ms 2 Oct 2022 561st Alithinar 375 315 10ms 15 May 2025 561st iliao2345 375 315 17ms 9 Jul 2025 566th andre-lameirinhas 🇵🇹 373 316 15ms 22 Apr 2019 566th amishtal 373 316 20ms 28 Nov 2019 566th cbondurant 373 316 10ms 10 May 2021 566th Shynif 373 316 11ms 21 Feb 2024 566th Masttest 373 316 10ms 29 Nov 2025 571st kypi 372 317 10ms 18 Feb 2020 571st Kasci 372 317 23ms 28 Dec 2021 573rd lmeuser 371 318 11ms 2 Dec 2017 573rd jdidion 371 318 11ms 22 Feb 2018 573rd estomagordo 🇳🇱 371 318 9ms 9 Dec 2021 573rd 1337-man 371 318 10ms 1 Feb 2022 573rd jeaosh 371 318 17ms 23 Oct 2022 578th CopperyMarrow15 370 319 11ms 16 Feb 2020 578th devRND-ess 370 319 24ms 30 Apr 2020 578th r-benson 🇬🇧 370 319 10ms 31 Jan 2023 581st Haksell 🇦🇶 369 320 9ms 1 Dec 2019 581st dgambit 369 320 11ms 12 Apr 2021 581st jacklecroy 369 320 16ms 13 Apr 2021 581st sleepyStick 369 320 18ms 8 Dec 2021 585th godraadam 368 321 11ms 16 Nov 2020 585th mothcolada 🇺🇸 368 321 12ms 13 Apr 2021 585th lemogne 368 321 10ms 8 Aug 2021 585th DylanScottCarroll 368 321 12ms 8 Nov 2021 585th UriyaBA 368 321 10ms 6 Dec 2023 585th tsidwick 368 321 10ms 20 Dec 2023 585th mantrades 368 321 10ms 24 Dec 2024 592nd TTWNO 366 322 11ms 8 Apr 2019 592nd maggym00 366 322 18ms 5 May 2021 592nd NoKGamer 366 322 10ms 6 Jul 2021 592nd mhenion8293 🇺🇸 366 322 10ms 19 Jan 2022 592nd Shiran-Yuan 366 322 9ms 5 Apr 2023 592nd setop 366 322 14ms 25 Aug 2023 592nd JakeDaCake36 366 322 10ms 19 Feb 2024 592nd abcdhhhh 366 322 10ms 24 Aug 2024 600th rasdasd 365 323 9ms 18 Nov 2019 600th b10011 🇫🇮 365 323 16ms 25 Jun 2020 600th Miles-1000 🇬🇧 365 323 10ms 14 Mar 2021 600th abrn 365 323 10ms 30 Jul 2022 600th Mikey-Beep 🇬🇧 365 323 10ms 3 Oct 2022 600th KiwiLT 365 323 10ms 21 Nov 2022 600th Seis 365 323 10ms 9 Dec 2022 600th jrbud 365 323 10ms 30 Dec 2023 600th lamorach 365 323 11ms 27 Mar 2024 600th gautambp 365 323 17ms 30 Jun 2025 600th EthanJantz 365 323 10ms 15 Aug 2025 611th sambirnbaum1 364 324 15ms 6 Sep 2019 611th dillon-duncando 364 324 10ms 4 Oct 2022 611th alexeldridge 364 324 10ms 8 Aug 2024 614th JamesPriest 363 325 10ms 19 Dec 2019 614th constant-stranger 363 325 9ms 28 Feb 2022 614th JuanGomez12 363 325 10ms 19 Jan 2023 614th ziselsberger 363 325 10ms 12 Oct 2024 614th Mizkii 363 325 10ms 20 Oct 2024 614th abhinavuppala 363 325 10ms 11 days ago 620th ydevor 🇮🇱 362 326 10ms 8 Mar 2021 620th piebot3000 362 326 9ms 13 Sep 2023 620th dlee888 362 326 10ms 17 Nov 2023 620th hellwue 362 326 10ms 29 Aug 2024 620th robbertvz 362 326 10ms 20 Jan 2026 625th jgermain48 361 327 11ms 9 Dec 2019 625th ianpoe 361 327 10ms 14 Mar 2020 625th Eilonlif 🇮🇱 361 327 10ms 9 Sep 2022 625th pustovalovm 361 327 10ms 13 Jan 2023 625th alexjurkiewicz 🇦🇺 361 327 9ms 7 Nov 2023 625th RedzGoose 🇦🇺 361 327 10ms 15 Dec 2024 625th honeyxm8 361 327 10ms 13 Mar 2025 632nd michael-celani 360 328 11ms 30 Dec 2017 632nd forlack 360 328 10ms 30 Oct 2021 632nd brochmann 🇸🇪 360 328 31ms 24 Jan 2022 632nd James-Oswald 🇺🇸 360 328 10ms 19 May 2023 632nd MichaelHorwitz 360 328 10ms 29 Aug 2023 632nd dragonshadows07 360 328 10ms 28 Jan 2024 638th ShadowGorn 359 329 11ms 10 Feb 2018 638th valgardg 🇮🇸 359 329 10ms 6 Aug 2021 638th PotatoSaladOverlord 359 329 10ms 13 Mar 2023 First Prev 561–640 of 1,102 Next Last
