South North
1♥ 4♦
4♠ 5♥
Pass
Generally I don't like assess the blame problems, but here I am showing one.
4♦ was splinter, 4♠ was cue-bid
Thoughts by north.. if parnter was interested in ♥ honors he would blackwood
Thoughts by south...if parnter has AKxx of hearts and I make slam try with 4♠, wouldn't sign off.
Result, easy 6♥ missed, and a huge imp loss.
Questions to consider.
1) Is north too good for splinter?
2) Should south bid 4NT directly
3) What should north bid over 4♠, and would 5♦ promise a ♦ void.
Ben

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