The Minesweeper hole will go live in approximately 5 days. Why not try and solve it ahead of time?
Collatz in Java 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 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 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 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 Transpose Sentence Trinomial Triangle 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 Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 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 Transpose Sentence Trinomial Triangle 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 Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st JayXon 🇺🇸 1,000 88 678ms 24 Sep 2025 2nd DialFrost 🇸🇬 989 89 398ms 24 Sep 2025 2nd ovs-code 🇩🇪 989 89 445ms 24 Sep 2025 2nd dokutan 989 89 553ms 24 Sep 2025 2nd sean-niemann 🇺🇸 989 89 535ms 24 Sep 2025 2nd Shanethegamer 🇺🇸 989 89 458ms 25 Sep 2025 2nd nwellnhof 🇩🇪 989 89 909ms 25 Sep 2025 2nd m-tkach 🇺🇦 989 89 455ms 25 Sep 2025 2nd namelessiw 989 89 501ms 23 days ago 2nd Yewzir 🇧🇪 989 89 521ms 23 days ago 2nd Yax42 🇫🇷 989 89 475ms 22 days ago 2nd stefangimmillaro 989 89 437ms 20 days ago 2nd CaedenHarper 🇨🇦 989 89 426ms 16 days ago 14th albanian-laundromat 936 94 384ms 24 Sep 2025 14th kmathis22 936 94 381ms 11 days ago 14th jkelly467 936 94 445ms 2 days ago 17th snoozingnewt 🇺🇸 926 95 489ms 17 days ago 18th Liibe 907 97 520ms 25 Sep 2025 19th Schmitt-Very-Cool 898 98 362ms 26 Sep 2025 20th Lydxn 🇨🇦 704 125 431ms 6 May 2022 21st Irratix 🇳🇱 698 126 442ms 4 May 2022 21st MeWhenI 🇻🇦 698 126 499ms 4 May 2022 21st janbehrens 🇩🇪 698 126 386ms 4 May 2022 21st shellbertt 🇨🇦 698 126 431ms 4 May 2022 21st inventshah 698 126 446ms 4 May 2022 21st ScottHamper 698 126 444ms 5 May 2022 21st 5quiwyrm 698 126 447ms 4 Sep 2022 21st KrausRaus 🇺🇸 698 126 441ms 9 Sep 2022 21st Betuaredead 698 126 414ms 5 Jan 2023 21st annaproxy 698 126 347ms 7 Jan 2023 21st Jacob385 698 126 366ms 4 Mar 2024 21st eMGeeneer 698 126 318ms 15 Jun 2024 21st mrondon8 698 126 406ms 2 Dec 2024 21st plastic-bottle 698 126 405ms 27 Aug 2025 35th Luca2812 693 127 421ms 12 Dec 2022 35th h3ra993huskp 🇯🇵 693 127 439ms 17 Sep 2023 35th tigerdan2 🇩🇪 693 127 580ms 19 Dec 2023 35th Apataras 693 127 426ms 16 Jul 2025 39th cbrt-x 682 129 431ms 6 May 2022 39th piano-miles 682 129 403ms 8 Feb 2023 39th lukashert 682 129 445ms 7 Jun 2023 39th bac0id 682 129 408ms 29 Jun 2024 39th yoshykai 682 129 417ms 27 Mar 2025 44th bwat2 677 130 367ms 5 May 2022 44th FlorianCassayre 🇫🇷 677 130 421ms 20 Sep 2022 44th Widgitty 677 130 438ms 29 May 2023 47th SiestaGuru 672 131 437ms 9 Jan 2023 47th HumanoidCPU 672 131 451ms 7 May 2024 49th c0d3-4-F00d 🇩🇪 667 132 469ms 6 May 2022 49th madeforlosers 667 132 457ms 26 Oct 2023 49th Blockyheadman 667 132 445ms 1 Nov 2023 49th SpiritAxolotl 🇺🇸 667 132 436ms 20 Mar 2024 53rd ravnskjaer 🇩🇰 662 133 415ms 11 Sep 2024 53rd 123mjb 662 133 384ms 26 Sep 2025 55th althryenix 657 134 461ms 25 Jul 2022 55th MrGagnonHPS 657 134 494ms 1 Nov 2023 55th noescareno 657 134 380ms 31 May 2025 58th lukehewittvandy 652 135 482ms 18 Jul 2022 58th OriEy 652 135 431ms 27 Apr 2023 58th Maximizer02 652 135 423ms 8 Jun 2024 58th 0dyse 652 135 439ms 23 Apr 2025 62nd crizin 🇰🇷 647 136 416ms 9 Sep 2023 62nd TheZwierzLF 🇵🇱 647 136 394ms 2 Jun 2025 64th eshilo-draper 642 137 434ms 4 Sep 2022 65th azka1368 638 138 365ms 23 Nov 2023 66th Smetalo 633 139 501ms 25 Aug 2022 66th ToxicP1e 633 139 412ms 2 Mar 2023 68th yashima 624 141 336ms 19 Oct 2024 68th matas132 624 141 419ms 16 Sep 2025 68th katss2 624 141 469ms 19 Sep 2025 71st msbranicky 607 145 434ms 9 Jan 2024 72nd deancureton 603 146 411ms 24 Mar 2024 73rd pyuraii 591 149 404ms 27 Sep 2022 73rd Chinay-Domitrix 🇺🇸 591 149 412ms 29 Mar 2025 75th KyleLashmet 587 150 473ms 18 Jul 2022 1–75 of 105 Next Last