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.
• If the defenders do not win the required number of tricks and there is only a single whister, then the whister loses the value of the contract in dump points ( ?0 ) for each undertrick.
• If the declarer ( the player or partner with the winning bid ) fails to meet the contract, the defending pair receives 10 points for each " undertrick " ( the number of tricks by which declarer fell short of the goal ).
• The defenders get 10 points per overtrick made by, or undertrick missed by, the declarers ( if the declarers bid 2 and only make 6 tricks, the declarers get nothing and defenders get 20 points; if the declarers make 10 tricks, the declarers get 80 points but the defenders get 20 for the 2 unbid overtricks ).
• The scores for ( re ) doubled undertricks are such that after the first vulnerable undertrick, " n " vulnerable undertricks cost the same as " n + 1 " undertricks when not vulnerable; for example, four undertricks when doubled and not vulnerable cost 800 points ( 100 + 200 + 200 + 300 ), the same as three undertricks when doubled and vulnerable ( 200 + 300 + 300 ).