White threatens an immediate Queen and Pawn Box Mate and black Defends
2) nf3 qf8
"Knight Pivots," or "nops" back in order to be able to move to a better position. Black offers a "Defensive Exchange."
3) ng5 qxh6
White Positions his Knight" strongly and at the same time "Sacrifices his Queen." Black "Must Accept" because white threatens mate at H7 with his Queen.
The "Smothered Mate," or smate.