2. The Basics of Overcalling Opponents and the Introduction to Doubles Lesson 6
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8. Points System with Doubling (Undertricks) This table details the number of points a partnership loses per undertrick. E.g. Going down 3 doubled in a non-vulnerable state will lose you 100+200*2 = 500 points, while going down 4 redoubled in a vulnerable state will lose you 400+ 600*3 = 2200 points! Non-vulnerable Vulnerable No X X XX No X X XX -1 50 100 200 100 200 400 -2/-3 50 200 400 100 300 600 -4 or more 50 300 600 100 300 600