Double Counting - A misevaluation when a player
counts wasted values. A common error is to count shortage points when
partner has counted length points. Another trap is to double count
one's own hand.
1S (P) 4S ?
Is South's Diamond singleton worth shortage
points with three top trumps? To do so would be double-counting
South's Spade honors for ruffing. Notice how West has three quick
tricks, plus the SJ if North ruffs one of South's Diamonds in dummy.