Position after 9 ... Bb7.
Black has given up immediate occupation of the center
for long-term control. White, on the other hand, has
set all eyes on the enemy King.
10 Qh5? (10 Kf1!)
10 ... Qe7? (10 ... Bxe5!)
And mate is imminent.
LEARN ABOUT THE DUTCH DEFENSE: LENINGRAD VARIATION