| Board 8 West Deals None Vul |
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NS 3♥; EW 4♣; NS 2♦; Par −100: NS 4♥×−1
| West | North | East | South |
| Pass | 1 ♦ | 2 ♣ | 4 ♥ |
| All pass |
| Lead: ♣ A |
At another table: p 1nt 3 ♣ 4 ♥ ap
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| Board 8 West Deals None Vul |
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NS 3♥; EW 4♣; NS 2♦; Par −100: NS 4♥×−1
| West | North | East | South |
| Pass | 1 ♦ | 2 ♣ | 4 ♥ |
| All pass |
| Lead: ♣ A |
At another table: p 1nt 3 ♣ 4 ♥ ap
West has to find the switch to diamond to defeat the contract. How?
ReplyDeleteThere is a slight clue but I think perhaps it is too hard.
DeleteEast doesn't have high spade honours and is unlikely to have high heart honours - east almost has to be void. Therefore with only five points in clubs West almost has to have some values in diamonds.
At teams the switch to diamonds is marked as it is only way to get 4 tricks. NS have 9 tricks on top. If S has doubleton to nothing and E has Ad only S can develop 10th trick in diam. If E has Kd the diamond only, a finesse or ruffling finesse will give 10th and 11th trick. If S has kc doubleton then E has to have Ak diam for bid but a club continuation will allow trumps to be drawn to avoid ruff.
ReplyDeleteIf south has a singleton a club continuation will allow avoidance of ruff if S has Ak diamond as on actual hand.
Only hand where it costs to switch to diam is if S has singleton S or Qs doubleton and doubleton club and E has Kd only. This allows S an overtrick. The overtrick is not important at teams but might cost a bottom board at pairs.
E play to first trick could also provide clue to partner. Depending on agreements E could discourage to indicate a switch is required. It should be more apparent to E need to cash diam before clubs. In this instance a high low switch would make it clear to E to continue D for ruff before attempting to cash kc.
Assuming one plays attitude, but suit preference if a switch is obvious from looking at dummy, this doesn't seem to meet the "obvious" criterion. Therefore something more extreme is called for, perhaps the QC, if nothing else it would be an alarm clock call, but pard would rationalise so would the KC be an alarm clock therefore the QD must be lower ranking suit preference.
ReplyDeleteAt the table I was worried about a doubleton club disappearing on dummy's diamonds, but as Wayne points out he must have values in diamonds for his 2C bid.
I think it is close to certain partner has the dAK if their two level overcalls are sound and you assume seven hearts for 4H. I did a simulation with east having 10+ with six clubs or 12+ with five clubs and got about 80% for the dAK with east.
DeleteInterestingly in those assumptions the more likely partner is to have five clubs the more likely partner is to have the dAK since with only a five card suit you need a better hand. Now I might overcall a decent suit with a little less but after the opening lead you know I am missing cAJT9. So I can't have a great suit.
Without the dAK then I have to have KQxxxx and sQ and only one of dAK. I might have sQ and dAK.
I think therefore on balance a diamond is right at trick two. Not sure I would always work this out at the table but I hope I might on a good day.