The Minesweeper hole will go live in approximately 3 days. Why not try and solve it ahead of time?
Collatz in Java in chars. 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 Chars Time Submitted 1st JayXon 🇺🇸 1,000 88 693ms 24 Sep 2025 2nd DialFrost 🇸🇬 989 89 746ms 24 Sep 2025 2nd ovs-code 🇩🇪 989 89 368ms 24 Sep 2025 2nd dokutan 989 89 759ms 24 Sep 2025 2nd sean-niemann 🇺🇸 989 89 762ms 24 Sep 2025 2nd Shanethegamer 🇺🇸 989 89 717ms 25 Sep 2025 2nd nwellnhof 🇩🇪 989 89 956ms 25 Sep 2025 2nd m-tkach 🇺🇦 989 89 498ms 25 Sep 2025 2nd namelessiw 989 89 454ms 25 days ago 2nd Yewzir 🇧🇪 989 89 774ms 25 days ago 2nd Yax42 🇫🇷 989 89 788ms 23 days ago 2nd stefangimmillaro 989 89 807ms 21 days ago 2nd CaedenHarper 🇨🇦 989 89 738ms 18 days ago 2nd Jacob385 989 89 365ms 2 hours ago 15th albanian-laundromat 936 94 719ms 24 Sep 2025 15th kmathis22 936 94 748ms 13 days ago 15th jkelly467 936 94 792ms 4 days ago 18th snoozingnewt 🇺🇸 926 95 764ms 19 days ago 19th Liibe 907 97 630ms 25 Sep 2025 19th Schmitt-Very-Cool 907 97 795ms 26 Sep 2025 21st Lydxn 🇨🇦 704 125 596ms 6 May 2022 22nd Irratix 🇳🇱 698 126 312ms 4 May 2022 22nd MeWhenI 🇻🇦 698 126 503ms 4 May 2022 22nd janbehrens 🇩🇪 698 126 418ms 4 May 2022 22nd shellbertt 🇨🇦 698 126 526ms 4 May 2022 22nd inventshah 698 126 394ms 4 May 2022 22nd ScottHamper 698 126 313ms 5 May 2022 22nd 5quiwyrm 698 126 334ms 4 Sep 2022 22nd KrausRaus 🇺🇸 698 126 442ms 9 Sep 2022 22nd Betuaredead 698 126 325ms 5 Jan 2023 22nd annaproxy 698 126 704ms 7 Jan 2023 22nd eMGeeneer 698 126 836ms 15 Jun 2024 22nd mrondon8 698 126 820ms 2 Dec 2024 22nd plastic-bottle 698 126 635ms 27 Aug 2025 35th Luca2812 693 127 533ms 12 Dec 2022 35th h3ra993huskp 🇯🇵 693 127 686ms 17 Sep 2023 35th tigerdan2 🇩🇪 693 127 574ms 19 Dec 2023 35th Apataras 693 127 479ms 16 Jul 2025 39th bac0id 688 128 662ms 29 Jun 2024 40th cbrt-x 682 129 617ms 6 May 2022 40th FlorianCassayre 🇫🇷 682 129 608ms 20 Sep 2022 40th piano-miles 682 129 499ms 8 Feb 2023 40th Widgitty 682 129 694ms 29 May 2023 40th lukashert 682 129 592ms 7 Jun 2023 40th yoshykai 682 129 665ms 27 Mar 2025 46th bwat2 677 130 317ms 5 May 2022 47th SiestaGuru 672 131 469ms 9 Jan 2023 47th HumanoidCPU 672 131 480ms 7 May 2024 49th c0d3-4-F00d 🇩🇪 667 132 687ms 6 May 2022 49th madeforlosers 667 132 318ms 26 Oct 2023 49th Blockyheadman 667 132 495ms 1 Nov 2023 49th SpiritAxolotl 🇺🇸 667 132 562ms 20 Mar 2024 53rd ravnskjaer 🇩🇰 662 133 345ms 11 Sep 2024 53rd 123mjb 662 133 594ms 26 Sep 2025 55th althryenix 657 134 330ms 25 Jul 2022 55th MrGagnonHPS 657 134 513ms 1 Nov 2023 55th noescareno 657 134 417ms 31 May 2025 58th lukehewittvandy 652 135 540ms 18 Jul 2022 58th OriEy 652 135 584ms 27 Apr 2023 58th Maximizer02 652 135 306ms 8 Jun 2024 58th 0dyse 652 135 825ms 23 Apr 2025 62nd crizin 🇰🇷 647 136 368ms 9 Sep 2023 62nd TheZwierzLF 🇵🇱 647 136 704ms 2 Jun 2025 64th eshilo-draper 642 137 593ms 4 Sep 2022 65th azka1368 638 138 651ms 23 Nov 2023 66th Smetalo 633 139 568ms 25 Aug 2022 66th ToxicP1e 633 139 690ms 2 Mar 2023 68th yashima 624 141 580ms 19 Oct 2024 68th matas132 624 141 438ms 16 Sep 2025 68th katss2 624 141 572ms 19 Sep 2025 71st msbranicky 607 145 547ms 9 Jan 2024 72nd deancureton 603 146 529ms 24 Mar 2024 73rd pyuraii 591 149 479ms 27 Sep 2022 73rd Chinay-Domitrix 🇺🇸 591 149 629ms 29 Mar 2025 75th KyleLashmet 587 150 333ms 18 Jul 2022 1–75 of 105 Next Last