1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Qd3 e5 6. dxe5 Qa5+ 7. Bd2 Qxe5 8.
O-O-O Nxe4 9. Qd8+ 1-0
This is called the “B15 Knight Variation,Carro-Kan”.
White always starts the game with a plan to dominate the center. He played the King's pawn, black played c6. White continued to dominate the center with d4. Then black played d5, protected by the c6 pawn, attacking the e pawn. White played Nc3 defending it. Black takes the pawn and the knight takes, placing itself in the center. Black plays Nf3, attacking the knight. It was the last book move. White played the ★ move, Qd3, then e5 was played. White played dxe5, wanting to trade queens, black refuses the offer and gives a check with Qa5+. White again played the ★ move, Bd2, preventing the check, attacking the queen, developing a piece and also opening up the way for O-O-O. Q captures e5,★. Now the ★ move was played, O-O-O. Now black blundered(??)... Nxe4, attacking the bishop, now white saw the best move, Qd8+, sacrificing the queen, and black resigned.
The reason was that Kxd8 was forced, after which Bg5 was a double check, a deadly one. If Ke8, Rd8#, if Kc7, Bd8#. So if you see these opportunities, never be afraid to sacrifice your queen...
Lesson by Saptanshu Deb