Showing posts with label pawn structure. Show all posts
Showing posts with label pawn structure. Show all posts

Sunday, February 10, 2008

Pawn Centres III: Fixed Centre

Today, part III of our series on pawn centres. Check out part I and part II. Once again, I draw on Bruce Pandolfini's Weapons of Chess. After the open and the closed centre, Pandolfini discusses the fixed centre, also known as blocked centre. It consists of two pawns blocking each other.


In fixed centres, you battle for control of the empty centre squares: aim your pieces at d5/f5 and d4/f4, respectively and secure them as outposts for further advances. Place pieces on outposts for an attack or to provoke a pawn move that messes with your opponent's pawn structure. Rooks can protect your outposts from the open file. Knights on c3/c6 defend the centre pawns and occupy an outpost square once secured. Defending pawns with bishops should be avoided because the pawns reduce the bishops' mobility along the diagonal; use your bishops to protect an outpost square instead.

Don't push your c-pawns to c4/c5 unless you know what you're doing: usually, these pawns are needed to chase away your opponents' pieces from their outposts, and pushing them weakens control of your own territory tremendously. Attacking players may be tempted to use the f-pawn for a pawn break, but this is much more dangerous in a fixed centre than a close one because of the open d-file; if your opponent attempts such a pawn break, remember the dictum "When attacked on the flank, strike back in the centre!".

I'll try to find an illustrative game as soon as I have access to my chess library again.

Tuesday, January 29, 2008

Pawn Centres II: Closed Centre

In our previous instalment we looked at the open pawn centre, which is characterised by the absence of central pawns and open e/d-files. In the closed pawn centre, on the other hand, the pawns stand in each other's way:


This structure resembles a road block: the pawns hamper piece movement through the centre and block the e/d-files. Players preferring a slow, defensive game may feel more at ease in such positions. Attacking players could resort to flank attacks or attempt to open up the centre using the c/f pawns.

Closed centres guard against early tactical onslaughts; therefore king safety is less crucial than in open positions. Sometimes, a king behind a closed pawn centre is safer even than a castled king. Development is less urgent, too: if you wish to attack, you have to manoeuvre your pieces around the pawn centre, giving your opponent ample time to set up a defence. Knights are often more powerful in closed positions than bishops because the pawns block the bishops' diagonals, whereas knights can move around rather easily and occupy outposts in the enemy territory.

In a closed pawn centre strategic planning is paramount. Spotting potential weaknesses in your opponent's pawn structure and piece placement will help you determine the right time for further pawn advances. Be patient. If you encounter an opponent who is used to play tactically and aggressively, see if he or she is trying to force things; an early attack in a closed position, once fended off, likely leaves certain squares and pawns in the attacker's camp vulnerable.

Further, players equipped with some endgame knowledge often benefit from closed centres in that they have something to ponder in a seemingly innocuous position (e.g. transpositions, piece & pawn exchanges, pawn structure) that might help them making slightly better moves. In any case, as soon as the pawn centre locks down, keep an eye out for endgame tactics involving doubled pawns, passed pawns, connected passed pawns, rook pawns, etc. and place your pieces accordingly.

Here now is a game between Heinrich Wolf and Akiba Rubinstein, Teplitz-Schönau 1922. Midway through the game, Wolf decides to close the centre -- a mistake Rubinstein is "quick" to exploit.