undertrick การใช้

For suite contracts, declarer also receives or pays 1 unit for each overtrick or undertrick.
Without a double or redouble, every undertrick has a fixed cost of 100 or 50 points.
*The undertrick penalty when doubled, not vulnerable, used to be 100 for the first undertrick and 200 for each subsequent.
*The undertrick penalty when doubled, not vulnerable, used to be 100 for the first undertrick and 200 for each subsequent.
The bidder's side scores 1 point per trick won, if this is not less than the bid, otherwise it loses 1 point per undertrick.