Notes on this puzzle
99 mines, 381 safe cells and one 30×16 field: that is Mine Finder #5311. Near the end you may need the total number of mines to decide the last cells.
The board starts with 26 cells already uncovered, 7% of the safe ground, so the first deduction is waiting for you. Under the cover, 68 safe cells touch no mine at all, 127 show a 1 and 115 show a 2; 71 cells carry 3 or more, and the highest number in the field is 5. 21 of the mines lie along the border of the field.
Where to beginKeep an eye on the mine counter; on this field the final pocket is often settled by the total.