I love chess and i learned a lot with that book.
Do you know he suggested the inclusion of two additional types of pieces in the game because he thought the tactical possibilities would ran out in a few years and all the games between masters would end in draws after him?
He suggested a chancellor that moves as both a rook and a knight and
a Archbishop that moves as both a bishop and a knight. He tried a version in a 10x10 board and a 10x8. Just imagine how much more complex would chess be now if that change had succeeded.
8 straight years without a single defeat...he was awesome !!