Opening 1NT with a singleton is now legal

ACBL has recently announced a ruling change which makes it legal to open 1NT with a singleton, but with some restrictions:

“A notrump opening or overcall is natural if, by agreement, it contains no void, at most one singleton which must be the A, K or Q and no more than two doubletons. If the hand contains a singleton, it may have no doubleton.”

The full article can be found on ACBL’s site.

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