DUPLEX

A chess problem, in which both Kings are mated, having usually two help-mate solutions. In one solution Black plays first and helps White to mate the Black King. In another solution White plays first and helps Black to mate the White King.

Fischer’s strength, among other things, was his ability to evolve the most efficient plan for the middlegame right after the opening. Boris Spassky
With the modern computer age, there are some new ideas, but the principles are basically the same… I try not to over-focus on preparation. Magnus Carlsen
2012
Everything is very concrete nowadays. The computer often gives unnatural moves which are correct, but sometimes hard to remember. You know a line is correct, but then your forget something and lose terribly. Daniel Stellwagen
2010
Unfortunately this gentlemanlike behaviour among chessplayers is out of fashion. It’s my principle that you should respect your opponent as much as you respect yourself. Lajos Portisch
1990
Tactics is what you do when there is something to do; strategy is what you do when there is nothing to do. Savielly Tartakower

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DUPLEX

DUPLEX

ECHESSPEDIA

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