Gerber
The use of 4
to ask for aces. If
partners last bid was a natural bid of 1NT or 2NT,
then a jump to 4 is Gerber. The responses are:
4![D](../images/d.gif) |
shows zero or all four aces |
4![H](../images/h.gif) |
shows one ace |
4![S](../images/s.gif) |
shows two aces |
4NT |
shows three aces |
See also Defence to Blackwood Interference.
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