The Set hole will go live in approximately 2 days. Why not try and solve it ahead of time?
ISBN in Ruby in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Maze Medal Tally Morse Decoder Morse Encoder 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Maze Medal Tally Morse Decoder Morse Encoder 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 1st Lydxn 🇨🇦 1,000 57 27 Feb 2022 2nd JayXon 🇺🇸 983 58 28 Dec 2024 3rd canissimia 🇦🇶 934 61 18 Jul 2022 4th primo-ppcg 🇹🇭 919 62 11 Jan 2022 4th Steffan153 🇫🇮 919 62 28 Jun 2024 6th ovs-code 🇩🇪 905 63 9 May 2023 6th nwellnhof 🇩🇪 905 63 18 Jul 2023 6th xsot 🇸🇬 905 63 14 Oct 2023 9th sisyphus-ppcg 🇦🇺 891 64 11 Jan 2022 9th GrayJoKing 🇦🇺 891 64 10 Feb 2022 11th MeWhenI 🇻🇦 877 65 7 Dec 2023 12th janlelis 851 67 11 Jan 2022 12th stefangimmillaro 851 67 26 Dec 2024 12th error256 851 67 14 Feb 2025 15th akshatj27 🇦🇶 838 68 10 Jan 2022 15th SirBogman 🇺🇸 838 68 19 May 2022 15th Shanethegamer 🇺🇸 838 68 27 May 2022 15th Natanaelel 🇸🇪 838 68 21 Jun 2022 15th Haksell 🇦🇶 838 68 23 Feb 2023 15th anter69 🇭🇺 838 68 20 Nov 2023 21st 4hg 🇺🇸 826 69 30 Nov 2022 21st Andriamanitra 🇫🇮 826 69 17 Apr 2023 23rd DialFrost 🇸🇬 803 71 26 Dec 2024 24th tatzyr 🇯🇵 792 72 28 Dec 2024 25th Waffle3z 770 74 12 Jan 2022 25th olleicua 🇺🇸 770 74 16 Feb 2024 25th emgordon154 770 74 25 Jun 2024 28th jared-hughes 760 75 9 Sep 2022 29th jstanley0 740 77 5 Feb 2022 29th xiBread 🇺🇸 740 77 5 Dec 2022 31st aaronze 🇦🇺 713 80 21 Sep 2023 32nd galloj 🇨🇿 687 83 9 Sep 2022 33rd HumanoidCPU 620 92 26 days ago 34th KatieLG 🇬🇧 613 93 9 Jun 2024 35th adoxography 588 97 20 Jan 2022 35th alexjurkiewicz 🇦🇺 588 97 7 Jul 2022 37th LostSyntax21 🇬🇧 576 99 9 Sep 2024 38th madex 🇩🇪 467 122 16 Jun 2024 39th mosegontar 410 139 6 Jul 2022 40th Ralac07 🇦🇺 375 152 21 Jun 2024 41st KatieLG-Transpiler 🇬🇧 288 198 3 Jul 2022 1–41 of 41
