- the 'd' pawn is pinned because moving it would allow 2.Bb5,Bxe8 capturing
- the king.
- On the right, after 2.Qf3,Bc4 black king is under check because of
- the options 3.Bxf7,Bxe8 or 3.Qxf7,Qxe8.
+ moving the 'd' pawn would allow 2.Bb5,Bxe8 capturing the king.
+ On the right, after 2.Qf3,Bc4 the threats are 3.Bxf7,Bxe8 and 3.Qxf7,Qxe8.