What is the strongest continuation for White?

Casual Game, https://itsyourturn.com
Analysis of John Coffey vs. Craig Foose

8 7 6 5 4 3 2 1 a b c d e f g h +2

(white to move) 1. Nf3 a5 2. e4 c6 3. d4 b5 4. c4 a4 5. cxb5 Qa5+ 6. Bd2 Qb6 7. Nc3 Bb7 8. Nxa4 Qd8 9. b6 Nf6 10. Bd3 d5 11. e5 Ng4 12. e6 f6 13. Bxh7 Rxh7 14. Qc2 Qc8 15. Qg6+ Kd8 16. Nc5 Rh8 17. Qxg4 Na6 18. Nd7 g5 19. Nde5 fxe5 20. Nxg5 Ke8 21. Nf7 Rh7 22. Nd6+ exd6 23. Qg6+ Kd8 24. Bg5+ Re7 25. Bxe7+ Bxe7 26. Qg8+

[ Flip the board | Reset | Options… ] Play chess online

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Mate in 7.

Live Chess, Chess.com
Analysis of Mustangcoffee (1523) vs. john2001plus (1840)

1 2 3 4 5 6 7 8 h g f e d c b a +7

(black to move) 1. e4 e6 2. c4 d5 3. cxd5 exd5 4. exd5 Nf6 5. Bb5+ Bd7 6. Bc4 Bg4 7. Nf3 Nxd5 8. Qe2+ Be7 9. h3 Be6 10. Nc3 Nf4 11. Qf1 Nxg2+ 12. Qxg2 Bxc4 13. Qxg7 Bf6 14. Qh6 Nc6 15. Qe3+ Qe7 16. d3 Be6 17. Bd2 O-O-O 18. O-O-O Nb4 19. Qxa7 Nxd3+ 20. Kb1 Nxb2 21. Kxb2 Rxd2+ 22. Rxd2 Qb4+ 23. Kc1 Qxc3+ 24. Kd1 Qxf3+ 25. Kc1 Qxh1+ 26. Kc2 Qe4+ 27. Kc1 Qc4+ 28. Rc2 Qf1+ 29. Kd2 Rd8+ 30. Ke3 Bg5+ 31. Kf3 Qh1+ 32. Ke2 Qd1#

[ Flip the board | Reset | Options… ] Play online chess

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Click here for 28. Kd1.
Click here for 30. Qd4.
Click here for 31. f4.