The Rule of 10 is used when a lead is fifth-best. It works as follows:
Here's an example:
Partner | ||||
♥ 5 | ||||
Declarer | Dummy | |||
♥ ? | ♥ 10 9 6 | |||
You | ||||
♥ K J 2 |
Partner leads the ♥ 5. Assuming this is a fifth-best lead, how many hearts are in declarer's hand which are higher?
Thus, declarer does not have any card above the
Partner | ||||
♥ A Q 8 7 5 | ||||
Declarer | Dummy | |||
♥ 4 3 | ♥ 10 9 6 | |||
You | ||||
♥ K J 2 |
The Rule of 12 is used when a lead is third-best. It works the same as the Rule of 10, except that the starting number is 12.
Example:
Partner | ||||
♥ 5 | ||||
Declarer | Dummy | |||
♥ ? | 10 9 6 | |||
You | ||||
♥ K J 2 |
Partner leads the ♥ 5. Assuming this is a third-best lead, how many hearts are in declarer's hand which are higher?
Thus, declarer holds two hearts higher than the
Partner | ||||
♥ Q 8 5 4 | ||||
Declarer | Dummy | |||
♥ A 7 3 | ♥ 10 9 6 | |||
You | ||||
♥ K J 2 |
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