[Fluffy]

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MPs, You lead Ace of spades asking for reverse attitude, partner plays the ♠10 and declarer the ♠5.

You can test your defence here: http://bridgegod.com....php?probid=572

[gszes]

I have windows 10 but no cards show up after the bidding ANYWAY it seems suicidal to pretend p might have the heart ace since that would mean the 3n bidder began with something like
Qxx Jxxx AQJ AKx hard to imagine anyone believing 3n looks palatable with that collection. I would much rather imagine declarer with something like Qxxx Axx Axx KQ(x) where 3n might merely take a little luck in one side suit (spades). This hand seems impossible to beat unless P has a club winner (ie the ace). Having the ace does not guarantee we will set 3n unless we do something positive before the ace is gone. Since it seems at least possible p might have started with a short spade we must cater to that possibility by switching to a small dia.
This gives us 2 possible ways of setting 3n either via diamonds or spades gaining us 4 tricks and the club A. Switching to a small dia does not change the original message that we wanted to start with spades so p will realize our dia suit is not a game changer since we would probably have preferred leading that. More importantly, If the dia switch appears to be a poor choice we can fall back on hoping p began with 3 spades if they return a spade after winning the club ace. The dia switch alone might prove very successful if we hit p with QJxx or even Q98 and a singleton spade.

[alok c]

Play D7 for a spade switch.

[Cyberyeti]

alok c, on 2016-February-09, 11:48, said:

Play D7 for a spade switch.

Unfortunately partner had 10x, xxxxxx, AJ109, Q and returned a spade, you scored poorly for -1, he returned a spade because he played you for AKJxx, xx, 7xxx/87xx, xx whichever you'd normally return the 7 from.

[alok c]

Cyberyeti, on 2016-February-09, 13:54, said:

Unfortunately partner had 10x, xxxxxx, AJ109, Q and returned a spade, you scored poorly for -1, he returned a spade because he played you for AKJxx, xx, 7xxx/87xx, xx whichever you'd normally return the 7 from.

With your proposed hand of partner,East's bidding appears to be totally reckless.

[Cyberyeti]

alok c, on 2016-February-09, 14:14, said:

With your proposed hand of partner,East's bidding appears to be totally reckless.

Really ? Qxx, AJx, KQxx, AKx or Qxxx, AJx, Qxx, AKx

[alok c]

Cyberyeti, on 2016-February-09, 14:31, said:

Really ? Qxx, AJx, KQxx, AKx or Qxxx, AJx, Qxx, AKx

From South's perspective to defeat the contract,North should have either HA & DQ or DA.For North to have DAJ10X it would be a rash bid on East's part to bid 3NT with two third round controlled suits against weak 3bid.

[Cyberyeti]

alok c, on 2016-February-09, 15:12, said:

From South's perspective to defeat the contract,North should have either HA & DQ or DA.For North to have DAJ10X it would be a rash bid on East's part to bid 3NT with two third round controlled suits against weak 3bid.

A weak 3 bid with only a maximum of 3 points in its suit, so at least one outside card for most people in first seat.

[alok c]

Cyberyeti, on 2016-February-09, 16:16, said:

A weak 3 bid with only a maximum of 3 points in its suit, so at least one outside card for most people in first seat.

The whole defence initiative is oriented from South's perspective.He knows east has already atbest 3rd round control in spade,so if east has DQ it is highly improbable that he does'nt have DJ.

[Fluffy]

Cyberyeti, on 2016-February-09, 13:54, said:

Unfortunately partner had 10x, xxxxxx, AJ109, Q and returned a spade, you scored poorly for -1, he returned a spade because he played you for AKJxx, xx, 7xxx/87xx, xx whichever you'd normally return the 7 from.

With ♠AKJxx you would had led ♠K asking for unblock/count.

[Cyberyeti]

Fluffy, on 2016-March-05, 16:52, said:

With ♠AKJxx you would had led ♠K asking for unblock/count.

Really, you've just butchered this with no side entry if declarer has Qxxx and partner a doubleton and an entry

[Fluffy]

Well I understand leading low spade is reasonable, although I think antipercentage, but the importnat message I tried to explain is that you wouldn't lead ♠A from that holding.

[rmnka447]

After trick one, ask yourself how do we defeat this contract? And consider what the ♣ situation must be in view of your doubleton.

After thinking things out, I found a 4th best 3 ♦ at trick 2 (or 3rd/5th if that's your agreement).