The dark-square bishop is the Stonewall Dutch player's key minor piece, and White almost always benefits from exchanging it off. Steve Giddins, 50 Essential Chess Lessons
Usually the side with the two minor pieces would like to avoid exchanging other pieces, whereas the side with the rook should seek exchanges. Esben Lund, Rook vs Two Minor Pieces
A desire to create complications at an early stage in the game sometimes urges a player into unwarranted experiments. Alexey Sokolsky, The Modern Openings In Theory And Practice
The fewer pieces there are on the board, the more squares will become available for the heavy pieces, and consequently their strength increases for every exchange. Jacob Aagaard, Excelling At Positional Chess
You should not eat a heavy meal during the hour before you play. Digestion will influence the amount of blood going to your head. Jacob Aagaard, Excelling At Chess
Among the positions that form exceptions to Tartakower's famous aphorism, "all rook endings are drawn," those where the stronger side has an outside passed pawn supported from behind are especially unpleasant for the defender. Mihail Marin, Secrets Of Chess Defence