Mauro
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You play precision with 1D including 13-15 balanced, and all unbalanced hands with diamonds, including 6D-5M.
Question 1:
do you open a systemic 1D ?
or a "tactical" 1S ? (e.g. Boss suit first, harder for opps to compete, if 5c major was heart, it would different)
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Question 2
I opened 1D. Bidding proceeded
1♦-(2♣)-pass-(2♥)
3♠-(4♥)-4♠-(5♣)
?
Do u bid 5 spades or pass or (ouch!)double ? And why ?
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Question 3
I ended up playing 5 spades and received a club lead.
Actually here, being at IMPS, the trump play did not really matter because I had 2 hearts losers with the A♥ offside.
But assume I was playing 4 spades with club lead. Which would be the best way to play trumps for one loser ?
Leading twice towards KQ of spades ? Maybe percentage play "a priori" but likely to fail since most high cards rates to be with LHO (who overcalled a vulnerable 2C) ?
1♦-2♣-p-2♥
3♠-4♥-4♠

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