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?
√2 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 239th lmolteno 742 66 23ms 9 Mar 2021 239th dillon-duncando 742 66 23ms 6 Dec 2021 239th NDR0216 🇹🇼 742 66 24ms 13 Feb 2023 239th quimey 742 66 12ms 6 Mar 2023 239th roupiq 🇵🇱 742 66 36ms 21 Feb 2024 239th wh3n3v3r 🇨🇿 742 66 13ms 8 Nov 2024 239th ImpressedByRocks 742 66 11ms 24 May 2025 248th urojony 🇵🇱 731 67 24ms 3 Jan 2021 248th tetraxile 731 67 24ms 3 Oct 2021 248th Nibamot 731 67 12ms 10 Dec 2021 248th CheeseCake628 🇳🇴 731 67 87ms 9 Feb 2023 248th GeorgeStechman 🇬🇧 731 67 47ms 6 Jan 2024 248th RandGuy 731 67 25ms 25 Jan 2024 248th Ralac07 🇦🇺 731 67 24ms 16 Feb 2024 248th inverseLorentz 🇦🇺 731 67 95ms 10 Apr 2024 248th driri85 731 67 13ms 7 Jan 2025 248th bitsandbeyond 🇳🇱 731 67 11ms 27 Jan 2026 258th markus-rekdal 721 68 23ms 31 May 2019 258th qoqosz 721 68 12ms 6 Jun 2019 258th giacomogallina 721 68 12ms 6 Jun 2019 258th skps2010 721 68 14ms 14 Jun 2019 258th hoodadam 721 68 13ms 19 Jul 2019 258th dzhang314 721 68 13ms 14 Aug 2019 258th sk- 721 68 12ms 11 Sep 2019 258th handisb 721 68 12ms 2 Nov 2019 258th amishtal 721 68 13ms 27 Nov 2019 258th Haksell 🇦🇶 721 68 12ms 1 Dec 2019 258th Matistjati 721 68 11ms 3 Dec 2019 258th Daniel-Martin576 721 68 13ms 1 Apr 2020 258th Jviscus1 721 68 12ms 24 Apr 2020 258th GalladeGuy 🇺🇸 721 68 12ms 23 May 2020 258th aliakseikalosha 721 68 13ms 9 Jun 2020 258th Jumprocks1 721 68 13ms 11 Jun 2020 258th itiievskyi 🇺🇦 721 68 12ms 30 Jul 2020 258th dev-loop0 721 68 12ms 20 Aug 2020 258th linstr13 721 68 12ms 29 Sep 2020 258th mueller14003 721 68 12ms 8 Oct 2020 258th davidverweij 721 68 12ms 21 Oct 2020 258th martinsifrar 721 68 12ms 23 Oct 2020 258th Dazza314 🇬🇧 721 68 12ms 6 Nov 2020 258th austinrwarner 721 68 12ms 25 Dec 2020 258th Tess2662 721 68 12ms 11 Jan 2021 258th fynnkroeger 721 68 12ms 20 Jan 2021 258th ydevor 🇮🇱 721 68 13ms 22 Feb 2021 258th asadullayev 721 68 12ms 3 Mar 2021 258th orifu 721 68 12ms 19 Mar 2021 258th josephjojoe 721 68 12ms 19 Mar 2021 258th harrymwilkins 🇬🇧 721 68 12ms 18 Jul 2021 258th ngocbd 🇻🇳 721 68 12ms 31 Aug 2021 258th potato-jackson 721 68 13ms 6 Sep 2021 258th ToE42 721 68 13ms 7 Sep 2021 258th ehulinsky 🇺🇸 721 68 12ms 16 Sep 2021 258th redbeancola 721 68 12ms 11 Oct 2021 258th walterfeyman 721 68 12ms 30 Oct 2021 258th xy3 🇮🇪 721 68 13ms 18 Nov 2021 258th sleepyStick 721 68 12ms 7 Dec 2021 258th akshatj27 🇦🇶 721 68 11ms 11 Jan 2022 258th Bonjour27891 🇻🇳 721 68 13ms 10 Feb 2022 258th LeeCamp 721 68 12ms 15 Feb 2022 258th suwat513 721 68 12ms 23 Sep 2022 258th ValentinCassayre 721 68 12ms 9 Oct 2022 258th Omega65536 🇩🇪 721 68 11ms 23 Nov 2022 258th jfallon1997 721 68 12ms 3 Jan 2023 258th Smoncko 721 68 13ms 1 Feb 2023 258th DragonaireM 721 68 11ms 6 Feb 2023 258th m3nt0ras 🇬🇷 721 68 12ms 16 Feb 2023 258th MiranDaniel 🇨🇿 721 68 12ms 29 Apr 2023 258th sd3b 721 68 11ms 1 May 2023 258th ZoeyKD 721 68 12ms 14 May 2023 258th Ripick 721 68 12ms 22 May 2023 258th msbranicky 721 68 12ms 10 Jul 2023 258th Stockoh 🇫🇷 721 68 14ms 5 Nov 2023 258th firegene 🇮🇪 721 68 12ms 24 Nov 2023 258th m42km 721 68 12ms 8 Dec 2023 258th epic-programmer-guy 721 68 12ms 17 Dec 2023 258th smokestacklightnin 🇺🇸 721 68 12ms 29 Dec 2023 258th Dataen 721 68 13ms 12 Jan 2024 258th scpchicken 🇵🇼 721 68 12ms 1 Feb 2024 258th Just4FunCoder 721 68 12ms 26 Feb 2024 258th sultan 721 68 12ms 9 Mar 2024 First Prev 241–320 of 581 Next Last
