Naval Minesweeper/en

Instructions

   

Place in the grid the given number of mines. Digits inside the grid show the amount of mines in surrounding cells. Mines cannot be placed in the cells with digits. Additionally place in the grid the given fleet. Ships cannot overlap the cells with digits and mines. Ships cannot touch each other even diagonally. Each ship should touch (by sides/corners) as many mines as the number of cells it occupies.

History

Invented by Vladimir Portugalov (Belarus).