A three-move problem mechanism invented in a composer tournament held in Bristol in 1861 by Frank Healey (1828-1906).
A clearance move by a piece along a line and over a certain square, played so that a second piece may move in the same direction along the same line and occupy that square. The first piece is not used for the mate.
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Quotes of the Day
As a rule, pawn endings have a forced character, and they can be worked out conclusively.
Mark Dvoretsky
I think that the World Champion should try to defend the quality of play more than anyone else!
Boris Spassky
It’s always more difficult to hold the title than to get it.
Vladimir Akopian 2012
Tal develops all his pieces in the centre and then sacrifices them somewhere.
David Bronstein
When you see a good move, look for a better one
Emanuel Lasker
