We were doing battle with the robots at Bridge Base Online (BBO) recently.
Sidebar: It was yesterday. We can’t release the hands until the day is over because other people could be playing the same hands. End Sidebar.
In this post-peak COVID-19 world BBO is still the place to play. Partner ‘Bot opens one spade and we see this flash on the screen in front of us:
S: KQJx, H: Axxxx, D: xxx, C: A
So we have 14 points, four card trump support and a singleton. Because this is the ‘Bot game and you know partner ‘Bot cannot have more points than you, so a robot only bid of four spades might be considered. However, the ace of spades, KQJ of hearts, and ace of diamonds is 14 points too and produces a sure slam.
So if you are going to bid it correctly then you have three possible responses. Two hearts shows five hearts and a game force (everybody is playing 2/1these days). Two no trump is Jacoby no trump for most folks and shows four-card (usually) trump support and a game going hand. Four clubs is a splinter and shows a singleton or void in clubs, four trump, and at least a game going hand.
You can only make one first bid. Which one should you make? We started by ruling out a splinter. Points in the singleton shouldn’t count. If the hand held diamonds Axx and clubs x, then we would splinter to four clubs. Why? Because you want strength in a potentially long suit.
Jacoby two no should be ruled out because it is for a balanced hand. It allows opener to show shortness. The downside is the slight possibility that opener has a single diamond which partner ‘Bot would show after two no. We would head for slam city.
The best choice is two hearts. If partner ‘Bot supports hearts then the next bid is Blackwood. If partner shows two key cards and the queen of hearts then everyone is checking kings for a chance to empty the bidding box at seven no trump.
We bid two hearts and partner ‘bot did not support. He bid two spades showing six (almost surely) spades. We bid four spades and made five. However, if the splinter was on (our hand would be diamonds: Axx, clubs: x) then we make six based on the cards and the lead.
Partner ‘Bot held spades:A10xxxx, hearts: Jx,diamonds KJ, clubs: Kxx. A diamond was led making the K a winner. In the alternative universe both would be winners and we could dump a heart on the diamond ace. Trumps split nicely in the alternative world we make six. In the actual world we lose a diamond and a heart.
The alternative world splinter and six spades is risky. You need a diamond finesse to work or a diamond lead and either the clubs ace onside or trumps to split two-two. Lots of duplicate players are willing to take that risk.