Friday, August 31, 2007

Jakovenko-Zhang Pengxiang, RUS-CHN Match (9) 2007
The lineup of the Bf5 and the Qd3 is pregnant with possibility; what ideas can you give birth to, with Black to move?

R. Martinez-Tiviakov, Conca della Presolana (7) 2007
Trying to mate with a pair of rooks at close range is usually an exercise in clumsiness, but with Black's pieces bearing down on his king White really has no other choice. Can he mate, and if so, how? (HT: Chess Today.)
Solutions here.
Wednesday, August 22, 2007

Morphy chose 8.Nc3 rather than 8.Qxb7, when Black can trade queens with 8...Qb4+. Morphy's choice is objectively inferior, but a better choice in the circumstances: rather than a slow win in a dull endgame, his overmatched opponents had to hold their own in a lively middlegame. They failed dismally, of course, losing perhaps the most famous game in history after 8.Nc3 c6 9.Bg5 b5 10.Nxb5! cxb5 11.Bxb5+ Nbd7 12.O-O-O Rd8 13.Rxd7 Rxd7 14.Rd1 Qe6 15.Bxd7+ Nxd7 16.Qb8+ Nxb8 17.Rd8#
Yet as I noted in a post a long, long, long time ago*, 8.Nc3 and 8.Qxb7 do not exhaust the options, and some commentators have suggested 8.Bxf7+, with the point that 8...Qxf7 9.Qxb7 allows White to win significant material.

Sergeant, Lasker, Ward and Kasparov all suggest that this is the most cold-bloodedly effective move, even if some (e.g. Lasker) find it inartistic. Only GM Valeri Beim has noted so much as the possibility that there might be complications down that path, and he's quite right! (My conclusion is that if White finds a long series of best moves, he emerges with a very small advantage - and it's Black who has all the fun along the way.)
Readers: if you haven't yet tried to work this position out for yourselves, I suggest giving it a try. If you're ready to check out my own analysis, click here.
P.S. If you want to look at a somewhat less detailed, more humorous analysis of the whole game when you're finished, click here.
* What are 15 months between friends? Better late than never, at least in this case.
Still, they do occur every now and then, and his last round victory from the August "First Saturday" tournament demonstrates his facility in irrational positions. Behold and enjoy.
Tuesday, August 21, 2007
Have a look, and I hope your amusement and amazement is tempered with a touch of pity for the poor victim.
Tuesday, August 14, 2007
DM-Pocket "Fritz", g/10:
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Ne7 6.O-O c5 7.c4 Nd7 8.Nc3 dxc4 9.d5 exd5 (novelty) 10.Nxd5 Nxe5 11.Nxe5 Qxd5 12.Bxc4 Qxe5 13.Bb5+ Nc6 14.Re1 Be4 15.f3 Rd8 16.Bxc6+ bxc6 17.Qe2 (eventually 1/2-1/2)
and challenged readers to find improvements for White. During the game I felt sure after 9.d5 that I should have at least a small edge, and I felt happy about my moves when playing them. Despite that, I "awakened" around move 15 or 16 to realize that Black was slightly better, and it was time to earn the draw. (Which I did.)
Here are my findings; readers are encouraged to offer further improvements.
Related Posts (on one page):
- DM vs. Pocket Fritz (Shredder) in 10-minute, part 2
- DM vs. Pocket Fritz (Shredder) in 10-minute: What did I miss?
Saturday, August 11, 2007
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Ne7 6.O-O c5 7.c4 Nd7 8.Nc3 dxc4 9.d5 exd5 (novelty) 10.Nxd5 Nxe5 11.Nxe5 Qxd5 12.Bxc4 Qxe5 13.Bb5+ Nc6 14.Re1 Be4 15.f3 Rd8 16.Bxc6+ bxc6 17.Qe2 etc.
Black is slightly better here, but despite being a pawn down and short of time, I was able to hold the draw without too much trouble. (Black's lousy queenside pawn structure was what I counted on, rightly.) Nevertheless, I was a bit disgusted and certainly confused: I felt after 10.Nxd5 and my clever 12.Bxc4 that I simply must be better! Yet it's not at all obvious where White could have improved, especially without the assistance of a computer.
See what you can find (without using Fritz, Rybka, Shredder, etc.); I'll offer my thoughts in a few days.
*In fact it's a version of the Shredder program, written by Shredder's author, but is called "Fritz" for (presumably) marketing purposes.
Related Posts (on one page):
- DM vs. Pocket Fritz (Shredder) in 10-minute, part 2
- DM vs. Pocket Fritz (Shredder) in 10-minute: What did I miss?
Tuesday, August 7, 2007

It's White to move, but can he win? It seems obvious that he can, but matters are far from simple. If you haven't worked it out yet, give it a shot. If you have, or just want to see the solution, here's it is.
Related Posts (on one page):
- A new position for analysis (from Simacek-Murdzia, 2006) - solution time
- A new position for analysis, from Simacek-Murdzia, 2006
Saturday, August 4, 2007

Can he win? I'll supply the answer Monday or Tuesday.
Related Posts (on one page):
- A new position for analysis (from Simacek-Murdzia, 2006) - solution time
- A new position for analysis, from Simacek-Murdzia, 2006
