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Tuesday, May 1, 2012

Chess Combinational Strategy.

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Chess Combinations.



 14.Re3! This move takes the pressure off the e-file and attacks the Black Queen. Black has only one way to defend against this threat: by blocking the e-file. 14...Be6 Now Black's Knight on a6 is left undefended and ready to pluck. [Note that I can counter a retreat like 14...Qd8 with 15.Rxe8+ because the White Queen on a4 is also eyeing the e8-square.] 15.Qxa6 So I now have a material advantage. The question is, "Can I get my other pieces out and shuffle my King to safety?" 15...cxd4 Black picks up a pawn, attacks my Rook, and opens up the c-file for his Rooks. The World Champion must play with energy, or else I'll succeed in consolidating my position. 16.Rb3! [I didn't fall for 16.Nxd4?? Qb4+ , which loses my d4-Knight.] 16...Bf5 17.Bg2 [The tempting 17.Nxd4?? is still a loser because, after 17...Qc5 , there is no defense against the dual threats of ...Qc1 checkmate and ...Qxd4, which wins back the piece.] 17...Bc2 18.Nxd4 Bxb3 19.Nxb3 By giving back a bit of material, I reduce Karpov's attacking force and make my defense easier. The material advantage of my two pieces vs. Black's Rook is still sufficient for victory if I can get my King out of the center. One of the strengths of a material advantage is that it gives you great defensive diversity; you can sacrifice some wood defensively and still come out ahead in the end. Remember this:A material advantage is a bit like ballast in a hot air balloon. If you start sinking, you can throw some of it over the side to stop your descent. 19...Rac8 20.Bf3 I defend my e2-pawn and create a hiding place for my King; [i.e. in the event of 20.Bf3 Qb4+ 21.Kf1 followed by Kg2, which has White burrowing in on the kingside.; Notice how I avoid the time-wasting 20.Bxd5? even though it grabs a pawn. I don't intend to capture anything else until I get my King to a safe place! Once that is done, I'll give my greed full rein.] 20...Rc2 21.0–0 My King's safety is finally taken care of! With His Majesty tucked away, it's time to launch my own threats. 21...Rxb2 22.Rd1 Stage one was winning material, and stage two was consolidation and King security. With this move, I begin stage three: attack and destroy Black's weak spots, the first of which is his d5-pawn. 22...Rd8 23.Nd4! I centralize my Knight and threaten 24.Nc6 with a juicy fork. 23...Rd7 [Note that 23...Qd7 stops Nd4-c6 but fails to 24.Qa3 , when Black's b2-Rook is ensnared!] 24.Nc6 Qe8 25.Nxa7 My material advantage once again becomes pronounced. This meal was quite satisfying at the time, because there is nothing I like more than devouring my opponent's pieces and pawns. 25...Rc7 26.a4 After eating one of my opponents pawns, my Knight found itself out of play on the side of the board. With this move, I am protecting the b5-square and preparing for the Knight's return to the center. In so doing, I am once again sticking to the plan: Take material and then consolidate the position. 26...Qa8 Black pins my Knight, but I have prepared a trick of my own. 27.Rxd5! Qxa7 [Now 27...Rxa7 28.Qd3 leaves Black without an answer to 29.Rd8+, which captures the Black Queen.] 28.Rd8+ Kh7 29.Qd3+ f5 A sad necessity. [If Black plays 29...g6 , then 30.Qd4 carries the double threat of Qd4xb2, which wins the Rook, and Qd4-h8 checkmate. Black would be forced to give up his f-pawn by playing 30...Rb1+ 31.Kg2 f6 32.Qxf6 and a fate similar to the one that occurred in the actual game.] 30.Qxf5+ g6 31.Qe6 [Black gives up because he sees that 31.Qe6 h5 (note that 31...Rg7 32.Qe8 renews my threats against his King) 32.Qg8+ Kh6 33.Qh8+ creates a double attack on his King and Rook on b2, with the inevitable loss of the Rook.] 1–0
 




White has an enormous material advantage. Black could quietly resign this position but nobody ever won a game by giving up, so he decides to hang on for dear life. How should White finish off his opponent? Actually, anything White does short of handing material back to Black wins. But let's put ourselves in White's shoes and attempt to beat Black in an orderly fashion. We need a target and a plan of attack. The target will show us where to concentrate our energies, and the plan will tell us what to do.In this case, we will choose the Black pawn on e6 as our target. Why this pawn? Because it cannot move. It stands to reason that it is easier to attack something if we can train our sights on it. We don't want a moving target, so the e6-pawn is an ideal candidate.One sensible first move would be 1.Bc4 , which opens the b-file for White's b2-Rook and brings the Bishop's powers to bear against the e6-pawn. Black is completely helpless, so nothing he does will have much consequence. He plays 1...Rh8 . Now White continues his e6-pawn assault with 2.Rf6 , and Black once again moves his Rook with 2...Rd8 . Notice how every White move is dictated by our chosen course of action. The goal is to win the e6-pawn, and the plan of action is to bring White's pieces to positions where they can attack this target.Now how should White continue? So far, he has attacked with two pieces (the Bishop and Rook), but the enemy defenses are easily holding against this small raiding party. The key to winning this position and most others is to involve the entire White army in the assault. Suppose you are the employer of four workers, two of whom never make any effort to do their jobs. Would you tolerate this situation? No! So why would you allow any of your pieces to act in the same manner? Make them earn their keep!Applying this philosophy to our present game, White forces the lazy b2-Rook to join in the attack on the e6-pawn with 3.Rb6 . Now the e6-pawn is attacked three times and defended only twice, meaning that White will win it. Note that if Black could somehow defend his pawn a third time, White would make use of his Knight (a fourth attacker!) by playing it to c5 or f4.This example shows how important it is to use your whole army. As a game of warfare, chess is a group activity, and each member of the group – pawns and pieces alike – must make a contribution.