Picture boards
The first click opens a picture. The rest is an ordinary game that never needs a guess.
Each board starts on the green cell, and that click opens an empty area in the shape of a picture. The picture is drawn with empty cells, not with mines, so it tells you nothing about where the mines are. Here is each board right after the first click.
Beginner 9×9 · 10 mines
Apprentice 12×12 · 22 mines
Intermediate 16×16 · 40 mines
Advanced 24×16 · 70 mines
Expert 30×16 · 99 mines
Master 30×24 · 160 mines
Cat outline✓ SolvedPlayPlay again
Heart outline✓ SolvedPlayPlay again
House✓ SolvedPlayPlay again
Plane✓ SolvedPlayPlay again
Circle✓ SolvedPlayPlay again
Smiley✓ SolvedPlayPlay again
Star outline✓ SolvedPlayPlay again
Mine✓ SolvedPlayPlay again
Snowflake✓ SolvedPlayPlay again
Fir tree✓ SolvedPlayPlay again
Number 1✓ SolvedPlayPlay again
Letter C✓ SolvedPlayPlay again
Letter F✓ SolvedPlayPlay again
Letter H✓ SolvedPlayPlay again
Letter L✓ SolvedPlayPlay again
Letter O✓ SolvedPlayPlay again
Letter P✓ SolvedPlayPlay again
Letter S✓ SolvedPlayPlay again
Letter T✓ SolvedPlayPlay again
Letter U✓ SolvedPlayPlay again
Spider✓ SolvedPlayPlay again
Letter E✓ SolvedPlayPlay again
Arch✓ SolvedPlayPlay again
Dog✓ SolvedPlayPlay again