North

 

1

?

 

 

South

1

1 N

 

Should I bid Two-Way Checkback and sign-off at 2 ? (this question could have been asked of a┬ástandard auction also….should I bid 2 since I know partner has four diamonds)

No, you should pass 1 NT. You have a balanced hand with 10 HCPs. Yes, since your partner does not have four spades, you know he will have at least four diamonds. However, you are playing in a duplicate matchpoint game and the score for playing NT vs. a suit is much higher. Just pass 1 NT and go for the points!

How do you know partner has at least four diamonds? The only hand that will open 1 with only three diamonds is a hand whose pattern is 4-4-3-2 (four spades, four hearts, three diamonds and two clubs). Therefore, when opener does not raise 1 , he does not hold four spades and must hold at least four diamonds.

Learn more of this technique in Patty’s “Winning Bridge Conventions” eBooklet series, Two-Way Checkback.