Storchenegger – Clemance, Auckland 1978:
Q: White’s last move was 13. Nd5. What is wrong with it?
This position is an excellent example of merely information vs. deep knowledge. We all know that centralising a piece can be a really good decision, especially when it is a knight. But here this allows Bxd5 that gives away the bishops pair but creates a symmetrical pawn structure where control over the only open file often decides the game. The New Zealand correspondence champion made no mistake and occupied the c-file by tactical means and won quite convincingly. This is also an excellent example of tactics at the service of strategy.
Here is the rest of the game.