Tuesday, November 20, 2012

Monday chess tactic

Black to move. How should black proceed?

7k/p2q3p/1p4pb/8/2QR4/1P4P1/P4K1P/6r1 b - - 0 4

6 comments:

Craig Johannsen said...

4. ... Qf5+ 5. Kxg1 Be3+ 6. Kg2 Qf2+ 7. Kh3 Bxd4 8. Qc8+ Kg7 9. Qd7+ Kh6 10. a3 Qf5+ 11. Qxf5 gxf5 12. Kg2 Kg5 13. Kf3 Bc3 14. h3 Bd2 15. Ke2 f4 16. Kxd2 fxg3 17. Ke2 Kf4 18. Kf1 Kf3 19. Kg1 g2 20. h4 Kg3 21. h5 h6 22. a4 Kh3 23. b4 Kg3 24. b5 Kh3 25. a5 bxa5 26. Kf2 Kh2 27. Ke2 g1=Q 28. Kd2 *

likelihood said...

I like 1. .. Qf5+, it saves the queen and it allows no checks. Interposing 2.Rf4 could just be taken with bishop; but if 2.Kxg1 Be3+ 3.Kg2 Qf2+ 4.Kh3 Bxd4 (3.Kh1 Qf3#). It seems, black stays ahead a piece either way

Yancey Ward said...

Qf5 immediately caught my eye, but it too me a few minutes to work it through to convince myself I wasn't overlooking something. The idea is to force the king away from e3 so the bishop can come to that square:

1. .....Qf5
2. Rf4

If 2.Ke2, black mates with Qf1. On Kxg1 black just plays Be3 immediately with a similar outcome:

2. .....Bf4
3. Kg1 Be3
4. Kg2

Or 4.Kh1 Qf3#.

There may be a mate in here (I don't see it if there is), but black is up a full piece and his king can hide at h6 if necessary.

pht said...

Black beeing up with a bishop seems to be a key here.
Black's rook seems lost however, how to save it?
I try:

1. ... Qh3
2. Kxg1 (or remain down with a piece)
2. ... Be3+
3. Kh1 Bxd4!
And black now remains down with a piece, since he has to protect Qf1# with his queen, and he can't take the bishop, can't give check, can't move king or h-pawn.

3. Qb5 (Qa6 Qd7) Qc8

I could't find what is wrong with this approach...

Yancey Ward said...

pht,

In your line, white captures with the queen at d4 with check, giving time to prevent Qf1#.

pht said...

To Yancey Ward:
Thank you. I didn't see the check.