Common mating patterns:
1) Bishop-Queen Battery pointing to h file:
2) Bishop-Queen Battery pointing to g file:
3) Bishop-Queen battery to f file (before castling):
4) Queen on g file and pinned g pawn:
5) horse and queen attack on h file:
6) Backrank:
7) damiano mate:
8) Opera mate (1&2):
9) swallowtail mate (1&2)
10) dovetail mate
11) suffocation mate
12) morphy mate
13)