The interference of one black piece by another like moving one on the same line (if the pieces are on different lines, it is a Holzhausen).
ECHESSPEDIA
Quotes of the Day
I can’t tell the difference between 100 zillion positions and 497 zillion positions, but if it helped Deep Blue play stronger, so be it. I was looking forward to Deep Blue boldly going where no man had gone before. 1997″
Vishy Anand
” The essence of chess is thinking about what chess is.”
David Bronstein
I understood that through chess I could express myself and chess became my natural language.
Boris Spassky 1995
Drawing general conclusions about your main weaknesses can provide a great stimulus to further growth.
Alexander Kotov
When you see a good move, look for a better one
Emanuel Lasker