The basic idea must be to force black king to a black field where it’s pinned against it’s queen (e.g. c3 is not a safe field).
Easy found motive, but I find too many variations that allmost work (some pawn comes in the way eventually). So I don’t have time to look through all those variations.
I think Vivian and Greg are correct- 1.Bc6 is the right beginning, and Greg’s analysis completely deals with the reply of dxc6 so I will concentrate on the alternatives for black, including the one that caused me the most problem last night.
Of course, black doesn’t need to take the bishop, but I don’t think it matters.
1. Bc6 Ke3 2. Qh6!
I think this is the only winning move in this line. This was the line I missed last night- I completely overlooked the skewer from h2 below. Continuing:
2. …..Ke2 (Kd4 3.Qf6+-) 3. Qh2 skewers the king and queen.
The main point here being that 5. Qf8+ can’t be met with d6, since black deflected that pawn allready on move one! If black had d6 here, K would reach b4 and save himself.
To find this over the board must be extremely difficult, you would immagine that the Ba4 was more waluable where it stands, e.g. it disallows Kc3 in some lines …
This one looks kind of familiar.
1. Bc6+ wins.
1. ….. bc6:
2. Qf3:+ Ke5
3. Qf4+ Kd5
4. e4+ Kc5
5. Qf8+ and wherever the BK goes, there’s a lethal skewer so the BQ is lost.
The basic idea must be to force black king to a black field where it’s pinned against it’s queen (e.g. c3 is not a safe field).
Easy found motive, but I find too many variations that allmost work (some pawn comes in the way eventually). So I don’t have time to look through all those variations.
Best I can find
Bc6+ dxc6
Qxf3+ Ke5
Qf4+ Kd5
e4+ Kc5
Qf8+ Kd4
Qf6+ Kxe4
Qxb2
Black can make some other moves, but the Q is lost.
I think Vivian and Greg are correct- 1.Bc6 is the right beginning, and Greg’s analysis completely deals with the reply of dxc6 so I will concentrate on the alternatives for black, including the one that caused me the most problem last night.
Of course, black doesn’t need to take the bishop, but I don’t think it matters.
1. Bc6 Ke3
2. Qh6!
I think this is the only winning move in this line. This was the line I missed last night- I completely overlooked the skewer from h2 below. Continuing:
2. …..Ke2 (Kd4 3.Qf6+-)
3. Qh2 skewers the king and queen.
Or:
1. Bc6 Bd5
2. Bd5 wins easily.
Or:
1. Bc6 d5
2. Qf3 Kd4 (Ke5 3.Qf4#)
3. Qf6 wins.
The main point here being that
5. Qf8+
can’t be met with d6, since black deflected that pawn allready on move one!
If black had d6 here, K would reach b4 and save himself.
To find this over the board must be extremely difficult, you would immagine that the Ba4 was more waluable where it stands, e.g. it disallows Kc3 in some lines …
Not taking bishop looses immediately:
1. Bc6+ Ke3 (Kd4 Qh8+)
2. Qh6+! Kxh2 (Kd4 Qh8+)
3. Qh2+
The pawn captures and the queen is lost. Just by harrassing the king with queen checks.