Appeared for the first time in 1915. A pin in which the Chessman subject to the pin may move along the same line (file, rank or diagonal) which it shares with the attacker.
ECHESSPEDIA
Quotes of the Day
When Korchnoi was living in the USSR I called him ‘hero of socialist labour’; when he moved to the West I renamed him ‘hero of capitalist labour’!
Boris Spassky
No player, however strong, no member, however large, shall stand above FIDE
Florencio Campomanes
This one hour allows me to put the problem into the background and then, when I come back, I am much more rational and less emotional about the particular problem and I can think better about it.
G. Borg 2016
When you see a good move, look for a better one
Emanuel Lasker
Carlsen is a combination of Karpov and Fischer style.
Garry Kasparov 2017