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?
Fractions in Python in bytes. 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 Bytes Time Submitted 81st annaproxy 820 89 16ms 2 Oct 2023 81st qpwoeirut 820 89 17ms 23 Nov 2025 83rd lynn 811 90 236ms 8 Sep 2021 83rd TobyBoyne 🇬🇧 811 90 18ms 10 Sep 2021 83rd OllieBoyne 🇬🇧 811 90 17ms 29 Apr 2022 83rd AlexanderFair 811 90 17ms 28 Jun 2023 83rd Command-Master 811 90 16ms 24 Sep 2023 83rd ZakkkkAttackkkk 🇵🇭 811 90 17ms 13 Nov 2023 83rd StefanHabel 🇨🇦 811 90 17ms 4 Mar 2024 83rd falsidge 811 90 19ms 30 Aug 2024 91st RYNO8 802 91 20ms 3 Sep 2021 91st dzshn 802 91 33ms 20 Sep 2022 91st fourth-bit 802 91 17ms 23 Jun 2023 91st Yewzir 🇧🇪 802 91 16ms 4 Feb 2024 91st sultan 802 91 34ms 28 Feb 2024 91st starfihs 802 91 17ms 5 Jul 2024 91st syyynth 802 91 23ms 15 Dec 2024 91st Pyroan 802 91 16ms 12 Jan 2026 99th michelebastione 🇮🇹 793 92 17ms 30 Oct 2021 99th programjames 793 92 18ms 16 Sep 2022 99th thehylian 793 92 19ms 3 Jan 2023 102nd btjones0 785 93 17ms 23 Oct 2021 102nd betaveros 785 93 17ms 30 Dec 2022 102nd Just4FunCoder 785 93 17ms 26 Mar 2023 102nd 051 🇸🇬 785 93 18ms 6 Jan 2024 102nd cros107 🇦🇺 785 93 16ms 27 Jun 2024 102nd shellbertt 🇨🇦 785 93 17ms 23 Aug 2024 102nd abhishekg999 785 93 17ms 21 Sep 2024 102nd commandz0 🇺🇸 785 93 17ms 23 Mar 2025 102nd FortuiteMan 🇫🇷 785 93 17ms 25 Jan 2026 102nd SectorCorruptor 785 93 19ms 3 Feb 2026 112th jmerle 🇳🇱 777 94 17ms 21 Jan 2022 112th jakobkordez 🇸🇮 777 94 32ms 24 Oct 2022 112th jeff-at-tamer-dot-codes 🇺🇸 777 94 17ms 12 Mar 2023 112th vgamula 🇺🇦 777 94 17ms 7 Nov 2023 112th SB-945 777 94 18ms 23 Jan 2024 112th agreegious 777 94 16ms 17 Nov 2024 112th keelimeguy 🇺🇸 777 94 33ms 17 May 2025 112th blaztoma 🇱🇹 777 94 16ms 18 Dec 2025 120th jared-hughes 768 95 16ms 4 Sep 2021 120th prplz 🇦🇺 768 95 17ms 1 Oct 2021 120th redbeancola 768 95 18ms 11 Oct 2021 120th Bonjour27891 🇻🇳 768 95 16ms 11 Mar 2022 120th AliceFord 768 95 17ms 4 Jun 2022 120th RDShah 768 95 17ms 12 Jun 2022 120th tri1212 🇻🇳 768 95 18ms 24 Aug 2022 120th FlorianCassayre 🇫🇷 768 95 17ms 30 Oct 2022 120th QuincyNash 🇺🇸 768 95 18ms 5 Dec 2022 120th scpchicken 🇵🇼 768 95 17ms 10 Jan 2023 120th aVitness 768 95 19ms 14 Jan 2023 120th randolchance 768 95 18ms 19 Jan 2023 120th CheeseCake628 🇳🇴 768 95 16ms 19 Jan 2023 120th 4ndyJ 🇬🇧 768 95 17ms 19 Jan 2023 120th TaserTheFox 🇺🇸 768 95 16ms 11 May 2023 120th janbehrens 🇩🇪 768 95 16ms 17 Jun 2023 120th fkantelberg 768 95 17ms 7 Aug 2023 120th Grrisly 768 95 16ms 25 Mar 2024 120th RobertHoeh 768 95 18ms 29 Apr 2024 120th NickTheEASDude 🇺🇸 768 95 16ms 17 May 2024 120th aaa123git 768 95 16ms 18 Jul 2024 120th Mabeloid 🇳🇴 768 95 17ms 8 Sep 2024 120th SirBogman 🇺🇸 768 95 16ms 14 Aug 2025 120th CommandLeo 🇮🇹 768 95 17ms 25 Nov 2025 120th Lv0Sys 🇵🇱 768 95 16ms 5 Dec 2025 120th Languag3 768 95 17ms 8 Dec 2025 120th zhaohm14 768 95 17ms 9 Jan 2026 147th NewDefectus 🇮🇱 760 96 87ms 4 Sep 2021 147th CedricGebistorf 760 96 17ms 13 Mar 2022 147th Irratix 🇳🇱 760 96 82ms 30 Apr 2022 147th Azearia 760 96 16ms 19 Feb 2023 147th quimey 760 96 16ms 3 Mar 2023 147th BREMAUCY 🇫🇷 760 96 18ms 10 Jul 2023 147th EnTerr 760 96 17ms 25 Aug 2024 147th NanduBC 760 96 19ms 6 Sep 2024 147th msbranicky 760 96 17ms 4 Jan 2025 147th ImpressedByRocks 760 96 34ms 10 Jun 2025 147th error256 760 96 17ms 31 Jan 2026 147th rustykitty 🇺🇸 760 96 16ms 4 Feb 2026 159th lovernj 753 97 18ms 4 Feb 2022 159th halworsen 🇳🇴 753 97 17ms 14 Feb 2022 First Prev 81–160 of 573 Next Last