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Online training: Please remember to detect the honors beforehand !!!

This deal happened in our weekly online training last Monday. I couldn't concentrate my attention due to the lack of card sense online. Rookie mistake should be mentioned here.

Board 13
Vul: Both
Dealer: North
East    West
1NT      2♣
 2♡       4♡
Lead: ♠7

South led ♠7 while North followed ♠J. And I won with the ♠Q. Now what's your plan?

♠7 seemed to be doubleton. Firstly, you couldn't avoid to lose 1♠, 1♢ and 1♣ at least. In other word, you must make a right guess in who had ♡Q. For me, due to the leading, I had supposed South hold long ♡ and he hadn't led trump, so I just played casually, cashing ♡K, then ♡J->♡2->♡5->♡Q... Oops...

Doing some detection first to find more clues might be a better choose. Sending out ♢ first and whatever who won, he had no choice but to return ♢ or ♠. I could win in hand. Crossing to table with ♣K. And now the distribution was clear. If one A for each, now it was your guess time, no more information I thought. Maybe long ♡ with Q. It was hard to say. However, if two Aces were in the same hand, ♡Q might in another defender in a high rate. Of course,  nothing is absolute. After all, it was a matter of luck. Just proposing an idea here, detecting in advance as much as possible under a certain safe circumstance might bring unexpected gains.

The full deal
Board 13
Vul: Both
Dealer: North


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