Tutorial in Ruby 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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 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 1st Shanethegamer 🇺🇸 0 28 54ms 20 Nov 2024 1st stefangimmillaro 0 28 44ms 20 Nov 2024 1st error256 0 28 50ms 21 Nov 2024 1st GolfingSuccess 🇬🇷 0 28 39ms 25 Nov 2024 1st DialFrost 🇸🇬 0 28 54ms 26 Nov 2024 1st sean-niemann 🇺🇸 0 28 54ms 26 Nov 2024 1st FlyingPenguin223 0 28 45ms 27 Nov 2024 1st emgordon154 0 28 56ms 28 Nov 2024 1st m-tkach 🇺🇦 0 28 54ms 28 Nov 2024 1st sisyphus-ppcg 🇦🇺 0 28 54ms 2 Dec 2024 1st SirBogman 🇺🇸 0 28 56ms 3 Dec 2024 1st Natanaelel 🇸🇪 0 28 57ms 9 Dec 2024 1st MeWhenI 🇻🇦 0 28 54ms 11 Dec 2024 1st antimon2 🇯🇵 0 28 59ms 16 Dec 2024 1st CaedenHarper 🇨🇦 0 28 55ms 4 Jan 2025 1st CLOStrophobic 🇮🇹 0 28 56ms 22 Jan 2025 1st kg583 🇺🇸 0 28 54ms 23 Jan 2025 1st ovs-code 🇩🇪 0 28 54ms 31 Jan 2025 1st pardouin 🇫🇷 0 28 50ms 2 Feb 2025 1st anter69 🇭🇺 0 28 52ms 3 Feb 2025 1st janlelis 0 28 54ms 6 Feb 2025 1st tatzyr 🇯🇵 0 28 54ms 16 Feb 2025 1st chocycat 0 28 52ms 1 Mar 2025 1st paul-c-hartman 0 28 52ms 7 Mar 2025 1st edsrzf 🇳🇿 0 28 51ms 17 Apr 2025 1st HumanoidCPU 0 28 52ms 18 Apr 2025 1st plcc0 0 28 51ms 21 Apr 2025 1st Just4FunCoder 0 28 39ms 18 Jun 2025 1st AbrahamJLR 🇻🇪 0 28 55ms 18 Jul 2025 1st Matter1024 🇮🇳 0 28 40ms 11 Aug 2025 1st vishal-mohanty 0 28 56ms 24 Aug 2025 1st LostSyntax21 🇬🇧 0 28 53ms 11 Sep 2025 1st snoozingnewt 🇨🇦 0 28 52ms 15 Sep 2025 1st Babafaba 0 28 39ms 5 Nov 2025 1st Boowie41 0 28 40ms 10 Nov 2025 1st moozzi 0 28 51ms 5 Dec 2025 1st TheZwierzLF 🇵🇱 0 28 41ms 27 Dec 2025 38th targrik 0 30 49ms 11 Sep 2025 39th artem-aramma 0 31 50ms 18 Jun 2025 39th Thinkr1 0 31 45ms 2 Feb 2026 41st uncertaain 0 32 52ms 4 Dec 2024 41st Azyrod 0 32 39ms 3 Feb 2026 43rd yobatm 0 39 44ms 3 Aug 2025 44th Nathan-Masala 0 57 49ms 14 days ago 45th matzuka 0 61 46ms 29 Jan 2026 46th jusaka 0 72 55ms 6 days ago 47th Cyssee 0 74 51ms 1 Mar 2026 48th matejmatik123 🇸🇰 0 81 39ms 18 Aug 2025 49th gigaprofisi 🇺🇸 0 135 55ms 3 Mar 2025 49th retrohun 0 135 48ms 1 Apr 2025 49th Bpc-CPU 0 135 51ms 12 Jul 2025 49th Vexxter9 🇳🇱 0 135 39ms 21 Aug 2025 49th luuumine 🇫🇷 0 135 40ms 16 Oct 2025 49th Openstreetmapler 0 135 49ms 30 Oct 2025 49th Mefred 0 135 53ms 15 Jan 2026 49th FortuiteMan 🇫🇷 0 135 55ms 3 Feb 2026 1–56 of 56