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As a bot you get the following hand
3♣ is a sort of long suit trial
I would probably have lead a ♦, giving away the contract, but the bot found on a 100 deals simulation:
S2: -396.00 -> 0.87
S8: -396.00 -> 0.57
CQ: -419.30 -> 0.43
D4: -419.70 -> 0.41
H3: -424.60 -> 0.24
HA: -429.00 -> 0.20
D8: -420.70 -> 0.08
H5: -424.60 -> -0.06
DT: -436.90 -> -0.24
C4: -440.80 -> -0.38
DQ: -454.30 -> -0.62
So the lead was ♠2 and the following dummy appeared
The first trick was ♠2->3->6->9
And declarer tabled ♥2, what now?
My intuition tells me to play low, as declarer probably wont have ♥K, and we would like our partner to play a ♦.
A simulation still on 100 boards gave me:
H5: -447.90 -> 0.44
H3: -447.90 -> 0.44
HA: -500.30 -> -0.88
So ducking seems right, but when played the Bot used ♥A and shifted to a ♦ giving away the contract.
So the simulation made on BBO might have had fewer deals and found the deals where ♥A was right. (I noticed that even in my simulation there were som result marked with ?)
So I went thru the 100 simulated deals, and what was interesting was that ♥A only gave an extra trick if the continuation was giving partner a ♥-ruff.
Now the problem is that after taking the trick with ♥A, the bot starts a new simulation with a new set of boards, and this time it figures out, that the best chance is hoping for 3 minor tricks and shifts to a ♦
By the way this was a very strange deal in the simulation
West to play to H2; S trumps
N/S have taken 1 trick
HA: 500 H5: 500 H3: 500