(19) Bxd2 Bxf3
The fact that Black has to exchange his well placed Queen's Bishop in order to win the Pawn h2 was very likely another reason which induced White to retake with the Bishop.
(20) Pxf3 Bxh2+ (21) K-g2
+———————————————————-+
8 | | | | #R | | #R | #K | |
|———————————————————-|
7 | | | #Q | | | #P | #P | |
|———————————————————-|
6 | #P | | | | | | | #P |
|———————————————————-|
5 | | #P | | | | | | |
|———————————————————-|
4 | | | | | | | | |
|———————————————————-|
3 | | ^P | ^P | | | ^P | | |
|———————————————————-|
2 | | ^P | ^Q | ^B | | ^P | ^K | ^B |
|———————————————————-|
1 | ^R | | | | ^R | | | |
+———————————————————-+
a b c d e f g h
DIAGRAM 68.
A general survey of the position shows clearly that Black has the advantage. His Rook d8 is ready to take part in the battle while White has to make several preparatory moves with his Rooks before he can make use of them on the King's wing, the only part of the board where they have a chance to be effective. In the e-line which White's Rook controls at present, there is no tangible object for an attack.
Moreover, White's King is rather exposed while Black's King is safely entrenched behind his Pawns.
A good continuation for Black, which presents itself at first thought, is R-d6, enabling the doubling of the Rooks in the d- line or the participation of the Rook d6 in a fight on the King's wing.
(21) … R-d6 (22) R-e4
White cannot take the Bishop h2 as Rxd2 would win the Queen. (22) P-f4 would not be good either as Black would reply Q-d7, threatening Rxd2 as well as Q-g4+; Kxh2, R-g6 and mate in two moves.