The solution to last Monday’s puzzle was that Karpov secured a slight edge by playing Ng3. Black was threatening to exchange his bad Bishop by playing Bf5. Now, if Black plays Bf5, White takes the Bishop with his Knight leaving himself with a good Bishop. And , if Black plays Nf5, White takes the Knight with his Bishop, leaving his opponent with a Bishop that is worse than White’s Knight.
This is not a huge advantage for White, but those sort of moves helped Karpov become World Champion.
This week’s puzzle is also on the theme of exchanging pieces. Sometimes we need to exchange off our opponent’s most important pieces.
How does Black get a clear advantage by a simple exchanging sequence?