On Friday, September 23, 2022 at 6:30:30 PM UTC-4, Elvenverb wrote:
Sometimes you can put a bishop or a knight in the way of another
piece to block their activity. It's fairly common to block the queen's diagonal attack with a rook. Is there a name for this move? The
piece does not threaten the aggressor, but obstructs the path of a
threat.
I've never heard this called anything but blocking.
But a more complex maneuver, in which you put a piece on a square where the paths of two opposing
pieces intersect (e.g. d3 if the white queen and KB are on their original squares) is called a Grimshaw.
It's very rare in games, Tarrasch pulled one off once, but it is common in problems. The idea being that whichever piece captures blocks the other one. So a triple block, first you block two of his pieces, then he blocks one.
William Hyde
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