Showing posts with label dogofthesouth. Show all posts
Showing posts with label dogofthesouth. Show all posts

Wednesday, July 20, 2011

Compensation

My relationship with my chess partner, Rybka 3, is a mixed one: it helps me understand my games after they are over; in turn, I have to put up with its "insults" (negative evaluations) about my play.

I trust Rybka's evaluations, but sometimes they are based upon the dynamic play that is possible in a position – often including moves played at the master level – as compensation for sacrificed material.

In games like the following, my opponent could be content with his extra material throughout the game. I struggled, successfully, as it turned out, to find all of the compensation that Rybka, afterward, assured me was there.

perrypawnpusher - irak
blitz 6 10, FICS, 2011

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian Opening.

4.0-0 Bc5 5.Bxf7+

The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Kf8


Stronger, but more complicated with more risk, is 7...Ke6. The text move keeps Black's advantage.

8.Qxe5 Bd6

I have faced this move, without ...h6 and 0-0, against LeiCar and dogofthesouth.

9.Qc3

Possibly a bit stronger than 9.Qd4 in perrypawnpusher - LethHansen, blitz, FICS, 2009 (1-0, 26).

9...Qf6

Black would not mind exchanging some pieces, to remove any danger to his King. White should be able to take advantage of this mind set and get an equal game.

10.d4 Bf4 11.Nd2

After the game Rybka 3 preferred 11.e5.

11...c6

AlonzoJerome - MarleysGhost, blitz, ICC, 2011, also continued with an overt "exchange" theme: 11...Bxd2 12.Bxd2 Qc6 13.Qf3+ Qf6 14.Qe3 d6 (1-0, 17)

12.Nf3 Bxc1 13.Raxc1 Ne7


Black is rightly pleased with his solid game, although a skeptic would point out that he moved his dark-squared Bishop four times in exchanging it for White's un-moved counterpart. These missing tempi can be seen in comparing the two home ranks: White's Rooks are linked, while it will take Black three moves to do so.

The question, as always, is: can White make something of this, or will Black's extra piece prevail in the end?

14.e5 Qe6 15.Qd3 Qxa2



I knew that Black could not afford this further loss of time, even with his solid position. This is the kind of  pawn-grabbing that Chess Challenger 7 used to do against me all the time, many, many years ago.

How to punish it??

16.b3 Qa6 17.Qe4

Understandable, although more consistent (i.e. "Jerome pawns") was 17.c4. Nothing is going to happen quickly, but White's clamp-down on Black's position can grow tighter and tighter.

17...Ke8


Far-sighted: he plans to make f5 a strong point for defense. It will cost him more tempi to get his Queen back into play, but if he does not create further weaknesses in his position it will remain White's responsibility to show compensation for his sacrifices.

18.Nh4 Qb5 19.f4 Qd5 20.Qe3 Rf8



As planned, but Black gets his moves out of order.

After 20...g6 White can still go for the breakthrough with 21.f5 but after 21...Nxf5 22.Nxf5 gxf5 23.Rxf5 c5 Black is still holding his own, according to Rybka 3. White would still have to play accurately and actively to show his compensation.

21.f5 d6

Understandable: Black hits White's center, and prepares to finally develop his Queen Bishop and Queen Rook. Unfortunately, it opens things up for White, who can now better get at his King.

As painful as it might have felt, Black needed to continue to set development aside and play something like 21...c5.

After the game Rybka 3 suggested 22.Rcd1 cxd4 23.Rxd4 Qc5 24.f6 Nd5 25.Qf2 gxf6 26.Nf5 Kd8 27.Nd6 b6 28.Ne4 with an edge for White. Again, that is a rather sophisticated evaluation: White's compensation is largely in dynamic play, and if he lags, he loses.

22.f6

Good, and thematic, but second best: how could I have overlooked the "Jerome pawn"-themed 22.c4 (followed by 23.exd6)?

22...gxf6 23.exf6

23...Qf7

After some excellent cold-blooded defense, Black slips again, and his game rolls downhill...

Rybka 3 reduces the game to a Rook and pawn endgame that is better for White with 23...Rf7 24.Rce1 Qg5 25.Qxg5 hxg5 26.Ng6 Bg4 27.Rxe7+ Rxe7 28.fxe7 Kd7 29.Rf7 Rc8 30.c4 a5 31.Kf2 Bh5 32.Nf8+ Ke8 33.Rg7 Bf7 34.Nh7 Kxe7 35.Nxg5 Kf6 36.Rxf7+ Kxg5 37.Rxb7 Kf4 38.Re7 Rb8.

24.fxe7 Qxe7 25.Qxh6

Again, this is enough, but the puckish 25.Rxf8+ was better, as 25...Kxf8 would have been followed by the Knight fork 26.Ng6+, winning the Black Queen.

25...Rxf1+ 26.Rxf1 Be6 27.Re1 Kd7 28.c4 Re8



Finally, the pieces are developed. If Black could move his Queen out of the pin along the e-file, he could envision further resistance, being only a pawn down, with a Bishop against a Knight.

29.d5 Qf8 30.dxe6+ Ke7 31.Ng6+ Kf6 32.Nxf8+ Ke7 33.Qg7+


Here Black's time ran out. His clock was still running over 2 1/2 minutes later, so I courtesy adjourned the game. He resigned the next day.

Friday, April 15, 2011

Trying My Hand at ICC (Part 2)

Marley was dead: to begin with. There is no doubt whatever about that.

And in my second game at ICC, I was playing his ghost, it appeared. My luck, Charles Dickens' character had died before Alonzo Wheeler Jerome had invented his gambit.

AlonzoJerome  - MarleysGhost
blitz 2 12, ICC,2011


1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian Game.

4.0-0 Bc5 5.Bxf7+

The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Kf8


 8.Qxe5 Bd6

Without ...h6 for Black and 0-0 for White, I have faced this move against LeiCar and dogofthesouth.

I have also seen 8...Qe7 9.Qf4+ Nf6 10.e5 Black resigned, perrypawnpusher - AirmanLeonidas, blitz, FICS, 2010.

9.Qc3

Maybe a little stronger than 9.Qd4 as in perrypawnpusher - LethHansen, blitz, FICS, 2009 (1-0, 26).

9...Qf6 10.d4 Bf4


Looking to exchange pieces and (eventually) take us to the endgame. That was okay with me, to start.

11.Nd2 Bxd2 12.Bxd2 Qc6 13.Qf3+


Keeping the Queen on the board to keep the chances of attack.

13...Qf6 14.Qe3 d6

White's development, and Black's unsafe King (on the same file as his Queen) give adequate compensation for the sacrifice.

15.f4 Bd7 16.e5 dxe5

A reflex reaction, but it ends the game.

17.fxe5 Black resigned.


Black will have only a Knight and Rook to face White's Queen (and two "Jerome pawns").

Wednesday, December 1, 2010

The Gentleman or the Tireder?

Except for a few slips, my opponent consistently outplayed me in the following game, which is especially notable given that he used up much of his initial 2 minutes quickly and played the large majority of his remaining moves on each 12-second increment.

Just when he reached a "won" endgame, he offered me a draw. Was he simply tired from playing so long on the knife's edge of time? Or had he seen what was to come, but in a sporting way rewarded my resistance with a half-point?

 
perrypawnpusher - dogofthesouth
blitz 2 12, FICS, 2010

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+


4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8


7.Qxe5 Bd6

This move is better than it looks at first glance, and forces White's Queen to abandon the center or abandon the board.

8.Qf5+

Also seen has been 8.Qc3, in perrypawnpusher - Lark, blitz, FICS, 2009 (1-0, 30); 8.Qa5, in billwall - firewine, Chess.com, 2010 (1-0, 53); and 8.Qh5 in blackburne - Whiterose, ChessWorld, 2004 (1-0, 11).

8...Qf6 9.Qxf6+ Nxf6 10.Nc3


I was not happy exchanging Queens, but sometimes it has to happen. I continued to play confidently and quickly, and a moment of uncertainty on behalf of my opponent (plus his use of time) was my reward.

Also played was 10.d3, in perrypawnpusher - LeiCar, blitz, FICS, 2010 (1-0, 34).

10...Be5 11.0-0 Bxc3 12.bxc3 d6


The pawn on e4 was free for the taking. I should have protected it with 11.d3. My opponent, however, was suspicious and gave me time to recover.

13.d3 h6

Louis Marin ground down his opponent after 13...Kf7, mrjoker - PhlebasP, ICC, 2008 (1-0, 34).

14.f4 Ke7 15.Ba3 Bd7 16.e5 Nd5 17.c4 Ne3 18.Rf2 Bc6


Black's last move (instead of 18...c5, blocking the a3-f8 diagonal) is part of his plan to put pressure on g2, but proves to be inaccurate and allows White to pull even.

19.Re1 Nxg2 20.Rxg2 Bxg2 21.exd6+ Kf7 22.Re7+ Kg6 23.Kxg2 cxd6

Black is up the exchange for a pawn (soon two), but with the proper follow-up White can now develop winning chances.

24.Re6+

This is not the right way, however. After 24.Bxd6, White's Rook can threaten Black's pawns at b7 and g7 (especially after Be5). When one of them falls, three pawns would be great compensation for the exchange.

24...Kf5 25.Rxd6 Rad8 26.Rxd8 Rxd8


Over the next 30 moves White's compensation falls, like autumn leaves from a tree. My opponent's play is not always the most accurate, but, given his time constraints, he did well; and certainly better than I did

27.Kf3 Rd7 28.Bb2 b6 29.Be5 Re7 30.c3 g5 31.d4 gxf4 32.Bxf4 h5 33.Be3 Re4 34.c5 bxc5 35.dxc5 a5


Black could have saved himself a lot of trouble by playing 25...Ra4 here. His a-pawn would then Queen, while my forward c-pawn would not.

36.Bd4 Rg4 37.c6 Rg8 38.c7 a4 39.a3 Re8 40.c4 Ke6 41.Kg3 Kf5 42.h4 Ke4 43.Bb6 Rc8


44.Ba5 Kd4 45.Kf4 Kxc4 46.Kg5 Kb3 47.Bb4


White had a clearer chance to play for the draw here with 47.Kf6: 47...Kxa3 48.Ke7 Kb3 49.Kd7 a3 50.Bb6 Rg8 51.c8/Q Rxc8 52.Kxc8 a2 53.Bd4 Kc4! Black can now run his King over to attack White's h-pawn, causing the Bishop to protect it; play ...a2-a1/Q, forcing the Bishop to capture the Queen and un-protect the h-pawn; and capture the h-pawn; but the Bishop will stop the final Black pawn from Queening.

I was thinking, instead, that getting another Black pawn off of the board was the key to my survival. It might have been, but not the way that I played it.

47...Rxc7 48.Kxh5 Kc4

It is possible that 48...Rb7 is stronger, as it implements the threat of capturing White's Bishop and thus freeing Black's a-pawn to advance and Queen. White would have to try something like 49.Bf8. I am not sure how much more Black could achieve by chasing the Bishop here and there.

49.Kg6 Kd5 50.h5 Rc6+ 51.Kg5 Ke6


White must now play 52.Kg6 to keep Black's King away from the h-pawn and maintain drawing chances.

52.h6 Kf7 53.Kh5 Kg8 54.Be7 Kh7


Now the h-pawn is doomed, and with it, quite probably, my game.

55.Bf8 Rc3 56.Kg5 Rf3 57.Bb4 Rg3+ 58.Kh5 Rh3+ 59.Kg5 Rg3+


At this point my opponent offered a Draw, and with a sense of relief I accepted.

The question in my mind was "Didn't Black have a win after 59...Rxh6"?

It turns out that the people who have created Rybka have a website (http://chessok.com/?page_id=361) where there is a 6-man Nalimov Endgame Tablebase which gives the answer: after 59...Rxh6 Black would have a mate in at most 48 more moves: 60.Kf5 Rh5+ 61.Ke4 Rh4+ 62.Kd3 Rg4 63.Bc5 Kg8 64.Bd6 Kf7 65.Bb4 Rh4 66.Bc5 Ke6 67.Bf8 Rh8 68.Bc5 Kd5 69.Bb4 Rh3+ 70.Kc2 Rg3 71.Be7 Rf3 72.Bb4 Kc4 73.Bd6 Rf2+ 74.Kb1 Kb3 75.Kc1 Rc2+ 76.Kd1 Rc8 77.Be7 Re8 78.Bb4 Kb2 79.Bc5 Rd8+ 80.Ke2 Kb3 81.Ke3 Rc8 82.Bb4 Rb8 83.Bc5 Kc4 84.Bd6 Re8+ 85.Kf2 Re6 86.Bb4 Rb6 87.Be7 Rb7 88.Bd6 Kd5 89.Bf4 Rb3 90.Bc1 Rc3 91.Bg5 Rxa3 92.Be7 Rd3 93.Bf6 a3 94.Ba1 Rd1 95.Bc3 Kc4 96.Bf6 a2 97.Ke3 Rd3+ 98.Ke4 Rc3 99.Bg7 a1Q 100.Bxc3 Qxc3 101.Kf5 Qd4 102.Kg6 Qe5 103.Kh7 Qg3 104.Kh8 Kd5 105.Kh7 Ke6 106.Kh8 Kf7 107.Kh7 Qh4#

Whew! That line is very complicated and possibly not worth the effort finding in a casual blitz game. In all fairness, though, White would be more likely to err and lose while Black would be risking very little.