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Mine detonates in
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マインスイーパ

Welcome to Minesweeper, one of the most popular logical single-player video games. This is an online version available for free to everybody. Enjoy!

This Minesweeper online game has been created in 2021. The game is modification of the game written by Shep Poor and distributed under Creative Commons license. The original of the Minesweeper game © 1981-1995 Microsoft Corp.

Overview

Minesweeper is a logical puzzle. It consists of a board of squares. Initially every square is covered and it is unknown to the player what is hidden beneath the cover. In the initial move, the player has to click anywhere in the board. This will uncover the square the player clicked on as well as some surrounding squares. Some of the squares will have numbers in them. The number indicates how many mines are in the surrounding squares. The goal is to use these numbers to infer where the mines are. If you figure out the location of a mine, you can flag it by clicking on it with the right mouse button. As you flag mines you will also deduce that some of surrounding squares cannot have contain mines. You can safely uncover them using the left mouse button.

Instructions

Here is a number of hints that may be helpful:

  1. You can click on the yellow smiley face to restart the game.
  2. You can zoom in and zoom out the game using the Options menu.
  3. If you left-click on a square with a number and the adjacent square already have the same number of flags as the number you just clicked, the other remaining adjacent covered squares will be revealed. This feature is called a safe neighborhood.
  4. The objective of the game is to uncover all fields that do note contain mines. You don’t have to plant flags at all!

Here is how options available in this game work:

  1. Opening move – when you make an initial click with this option on, you always find a square which is empty, so that you discover a large area. With this option off, the board is created entirely randomly so you can find a single digit or even a mine with the first click.
  2. Question mark – with this option on, after you right-click on the flag you change it into a question mark. Click once more to remove the question mark. If this option is off, right-clicking only plants a flag or removes it.
  3. Safe neighborhood – with this option on you can click on a digit which has the corresponding number of mines found in order to uncover the remaining squares. If this option is off, clicking on a digit does nothing.
  4. Open remaining – with this options on, after finding all mines and marking the with flags, when the remaining mines digital display shows "000", you can click on this display to uncover all remaining squares.
  5. Disarm – when this option is on and you click on a mine, you have three second to save yourself. If the option is off you just die immediately.
  6. Hint – with this option on you can hover your mouse over a square and press H to reveal what is hidden beneath.

Solving example

This little tutorial shows how to solve a Minesweeper game

In this example we start with a beginner difficulty level. The number of remaining mines is on the digital display in the top-left corner of the minesweeper board. Let’s start by left-clicking on the randomly selected square. In this example we choose the square marked on the picture with a red circle.
After the initial click, a number of squares are uncovered. Some of the uncovered squares have numbers in them, some of them are empty. The numbers indicate how many mines are hidden beneath the surrounding covered squares. Notice the square with 1 in it, market by a red circle. There is only one uncovered square adjacent to it (marked with a brown circle). And since there is only one adjacent mine, the mine must be beneath this covered square. Let’s plant a flag on this square by right-clicking on it.
Now that we planted our first flag, we can uncover more squares. Take look at the square with the 1 in it, marked with the red circle. We know that there is only one mine in all three adjacent squares above it. But we have already found this mine and marked it with a flag. This means that in the two remaining squares (marked with brown circles) there is no mine. We can safely uncover them by left-clicking on them.
Now we are ready to plant our second flag. As before, we can find a square with 1 in it (marked with a red circle), which has only one covered square around it (marked with a brown circle). The mine must be there and so we can safely plant a flag by right-clicking on this uncovered square.
After planting the second flag, we again notice squares with 1s in them, which already has flags in their neighborhood. Two of such squares are marked with red circles. Since both of them already has one flag close by, thus there cannot be a mine in the other uncovered squares adjacent to them (marked with brown circles). We can left-click on these fields to uncover them.
Again, there is a square with a 1 in it for which the adjacent mine has already been found. Let’s left-click on the only remaining uncovered square (marked with a brown circle).
After uncovering the two squares mentioned above, we noticed that the square above the flag on the right also has 1 in it, and so we can uncover the square to the left of it, which reveals number 2. Now let’s pay attention to the 3 marked with a red circle. There are three mines in the adjacent squares. And there are three uncovered adjacent squares in total: one on the left has already been marked with a flag and the remaining two up top are still uncovered. There is no other way – the two uncovered squares must contain mines so that there are three mines in the squares adjacent to the digit 3. Let’s plant flags in these two squares.
Now let’s pay attention to the two squares containing digit 2, marked with red circles. Both these squares have only two adjacent uncovered squares, marked with brown circles. These two adjacent squares must therefore contain mines. Let’s plant our flags there.
Now we can identify some squares which already has appropriate number of mines flagged around them. The two examples are marked with red circles. Since the number of mines in adjacent squares matches these digits, it means that remaining uncovered squares cannot contain mines. We can thus uncover them by left-clicking on them.
One of the newly uncovered squares (marked with a red circle) contains digit 2 and has only two uncovered squares around it, one of which is already marked with a flag. We can mark the other square with a flag.
In the next step, we see three squares with digit 1, all of which already have a mine in one of their adjacent squares. All other adjacent squares can be than safely uncovered. These squares are marked with brown circles.
Now let’s focus on the digit 2 market with a red circle. As before, it has only two uncovered squares around it, one of whom has already been marked with a flag. We can thus plant the flag in the other one (marked with a brown circle). Notice that as we do it, our mine counter in the top-left part of the minesweeper board indicates that the remaining number of mines drops from one to zero. This means that we can safely uncover all remaining squares as they surely do not hide mines beneath them – all mines have been already found!
The game is won! The time counter in the top-right corner of the minesweeper board indicates that it took us exactly three minutes to complete the game.

History

Minesweeper is an old logical game which was designed over 50 years ago. It was popularized after it was included in Microsoft Windows 3.1 in order to help people learn how to use mouse and to teach them usefulness of mouse left-click and right-click.

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