mikeh, on Dec 18 2007, 01:50 AM, said:
I posted a hand earlier today in the B/I section: the play in 4♠, after RHO opened 1♦.
North
K A Q x
10 J 10 x
9 9
x x
x
South
A 10 - A
J x - K
9 x - x
8 - x
7
6
After a low diamond, the 10 forces the K and you ruff. The best line, as posted by jdonn, is to cash one top club. cross to dummy, play a club to hand and then ruff a club with the trump K, then a diamond ruff and ruff the last club with the 10, thus guarding against RHO holding a stiff club (leading the 2nd club from dummy so he ruffs air if he ruffs) and also guarding against RHO holding 2 clubs and overruffing the 10 on the first round.
I neglected to lead the second club from dummy. So I made an error, but an error that few players would spot. In my defence, had RHO played a club honour on the 1st round, I am sure I would have woken up, and the odds of LHO not leading a club from QJ10xxx seems low.
But this goes to show why, in my view, experts tend to state that there are a lot of mistakes being made, while less-skilled players think that experts make almost no errors.
I think many players would not even see the need to ruff clubs in dummy, preferring to try to establish hearts, while those who do play for ruffs will often ruff with the 10 on the first ruff (altho this is almost certainly risk-free even if rho can overruff and return a trump... I leave the analysis to those interested)
Not sure about this crossing to dummy business. The only card you can do that with is the ace of hearts. If East has a singleton club (the only reason for crossing to dummy in the first place), then he may ruff the second club anyway and play three more hearts from an original 2=4=6=1 distribution, leaving you unable to make the contract if West began with three spades to the queen.
Of course, this implies that West did not lead his low singleton heart at trick one, which is unlikely. But so is a 6-1 club break. Moreover, if East began with
♥KQx and a singleton club, he may ruff the second club, cash two hearts, and exit with any diamond, leaving you to guess whether he began with 4=3=5=1 or 3=3=6=1.
It seems better on the whole to cash the second club at trick three - even if East ruffs, he is somewhat endplayed at that point, and your chances of making the contract are still very good.
Now, does crossing to the ace of hearts constitute an error? I think I had better leave that to the experts.