FelicityR, on 2019-May-12, 08:03, said:
This was a difficult hand I encountered last week playing MPs against good opponents who were playing Five Card Major Acol. Upon asking, I was reliably informed that the 4D splinter bid by the opponents would show 4+ hearts as support, 11+ HCPs. I was very apprehensive bidding the poor spade suit, thinking that partner would infer that it's better than it is especially vulnerable.
I felt it was a particularly hard hand to evaluate, especially vulnerable, whether one was playing MPs or IMPs, and that there were a number of options available. From my cards I had a feeling the opponents were heading towards a heart small slam, so I was tempted to pass hoping that they arrived there and I could make a Lightner Double for the club lead.
However, I finally chose after a long think 4NT as (I hoped) Blackwood, knowing that my partner would not have more than one ace and if necessary we could deceptively arrive in 5 Diamonds. It also still gave me the option of a Lightner Double if they still arrived in a heart small slam.
As always I am interested in your opinions, and thank you in advance for your replies.
I'm going to suggest that you bid 5
♣ whether or not partner would take it as a cue bid or not. The only problem is the adverse colours of red vs white. At favorable colors I would definitely do so. The reason is simple mathematics. 10 down at white vs red is 500 vs 620 or 650 or 680 at worst even if they do not bid their small slam. I think that you can count on getting your Ace
♥ as a trick in a 5
♣ contract. Also it should be obvious that if you are doubled you will revert to
♦. If partner raises you! (LOL) you can also outbid him in diamonds.
I think that a small slam for them is odds on right now and the only advantage that you have is that you are the first player to be aware of this fact. The adverse red vs white colours have a danger of being left to play in 5
♣ undoubled for -10 down. Personally I find this danger to be very very low on average, (both opponents would have to resist the temptation to double). If you have an agreement with partner of a lightner double after this kind of auction for him to lead your "suit" then this kind of bid has even higher advantages, especially at imps.
This kind of strategic "void suit bid" comes around very rarely, especially when you can escape to a higher ranking suit so I take advantage of it every time that I can.
Cheers, T