Plenty of thots this holiday. During the National Junior there were 2 games that Mark played that troubled me. Both times he was white and both times he played a player we evaluated (rightly or wrongly) as weaker than him. In both games he went into Najdorf. He lost one and drew the other. We have come to the understanding that it is important to play the correct opening with the correct opponent. So we prepared against the field that we assessed he needed to win or draw with to do well in the tournament. Sadly we didnt consider these 2 players. Our assumptions at the time was that he should be able to beat the lower ranked players in any opening. And so we are now still licking our wounds. :)
In this day and age, with computer analysis and a plethora of information, a stronger player can fall to anyone if you play into their line. And this was a painful reminder.
Got to chatting with Andrew (gilachess) on google today and lamenting to him. After singing "Thats what friends are for" twice!, he passed me these links.
I am going to share it with you now. Hope it will help you. And you wont need to sing to me either.
Good luck with your chess.