A heraldic piece displaying different identity symbols on each side. The piece may be flipped over at the close of a move (or as a move in itself) and assume its alternate identity.
ECHESSPEDIA
Quotes of the Day
Never felt more like singin’ the blues, cos I never thought that I’d ever lose…
Vladimir Kramnik 2017
Kasparov’s book are the best, as far as high level analyses are concerned.
Jan Timman 1991 NIC
Everything is very concrete nowadays. The computer often gives unnatural moves which are correct, but sometimes hard to remember. You know a line is correct, but then your forget something and lose terribly.
Daniel Stellwagen 2010
I have often written that Karpov is like an iceberg. Well, Kasparov was the Titanic.
Alexander Roshal
“Chess is the struggle against the error.”
Johannes Zukertort