Another ace goes astray

[smerriman]

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=Robot&s=SKQJ652HDAKQ86CJ9&wn=Robot&w=ST843HKQ4D4C86542&nn=smerriman&n=S97HAJT962DT732CK&en=Robot&e=SAH8753DJ95CAQT73&d=s&v=b&b=7&a=2C(Strong%20two%20club%20--%2019+%20HCP%3B%2023+%20total%20points%3B%20forcing%20to%202N)P2D(2D%20bid%20waiting%20--%20forcing%20to%202N)P2S(Opener%27s%20suit%20--%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points%3B%20forcing%20to%203S)P3H(4+%20%21H%3B%205+%20total%20points%3B%20forcing%20to%203N)P4D(4+%20%21D%3B%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points)P4N(Blackwood%20%5BD%5D%20--%204+%20%21D%3B%204+%20%21H%3B%209+%20total%20points)P5N(Even%20number%20of%20keycards%20and%20some%20void%20--%204+%20%21D%3B%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points)P6D(4+%20%21D%3B%204+%20%21H%3B%209+%20total%20points)PPP&p=SAS2S3S7C3C9C6CKD2D5DKD4&c=12]400|300[/hv]

 

It's one thing for GIB to not cash an ace to defeat a slam.

 

But what could possibly cause GIB to *underlead* said Ace?

 

NB - I was South, and 2♣ may have put GIB off a little on the lead, but this is trick 2, and my hand is dummy.

 

Edit - this was MP, so I guess it was trying to defeat the contract by 2 tricks. But is it worth the risk? In hindsight maybe it actually is. I'm too used to playing IMPs. Ignore me.

[TylerE]

No, never ever ever try for -2 on this.

 

Slam -1 is NEVER a bad MP result. It may occasionally be only average, but never bad.

[smerriman]

Does GIB assume everyone is in the same contract in MP? That would explain it.

[lycier]

Even I know you shouldn't open strong 2♣, I would better replay this hand, see if this problem is recurring.

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=lycier&s=SKQJ652HDAKQ86CJ9&wn=Robot&w=ST843HKQ4D4C86542&nn=Robot&n=S97HAJT962DT732CK&en=Robot&e=SAH8753DJ95CAQT73&d=s&v=o&b=11&a=2C(Strong%20two%20club%20--%2019+%20HCP%3B%2023+%20total%20points%3B%20forcing%20to%202N)P2D(2D%20bid%20waiting%20--%20forcing%20to%202N)P2S(Opener%27s%20suit%20--%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points%3B%20forcing%20to%203S)P3H(4+%20%21H%3B%205+%20total%20points%3B%20forcing%20to%203N)P4D(4+%20%21D%3B%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points)P4N(Blackwood%20%5BD%5D%20--%204+%20%21D%3B%204+%20%21H%3B%209+%20total%20points)P5N(Even%20number%20of%20keycards%20and%20some%20void%20--%204+%20%21D%3B%205+%20%21S%3B%2019+%20HCP%3B%2023+%20total%20points)P6D(4+%20%21D%3B%204+%20%21H%3B%209+%20total%20points)PPP&p=SAS2S3S7CAC9C2CKCQCJC8DTD7D5DAD4DKH4D2DJDQS8D3D9D8C5H2H8D6STH6C3SKS4S9H7SQC6H9CTSJC4HTH5S6HQHJH3S5HKHAC7]400|300[/hv]

 

See the result, my basic Gib never tell your story twice.

[lycier]

Normal Gib sequence goes :

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=Robot&s=SKQJ652HDAKQ86CJ9&wn=Robot&w=ST843HKQ4D4C86542&nn=Robot&n=S97HAJT962DT732CK&en=Robot&e=SAH8753DJ95CAQT73&d=s&v=o&b=11&a=1S(Major%20suit%20opening%20--%205+%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points)P1N(Forcing%20one%20notrump%20--%203-%20%21S%3B%206+%20HCP%3B%2012-%20total%20points)P3D(Strong%20hand%20--%204+%20%21D%3B%205+%20%21S%3B%2018-21%20HCP%3B%2019-22%20total%20points%3B%20forcing%20to%203N)P4D(4+%20%21D%3B%202-%20%21S%3B%207+%20HCP%3B%2012-%20total%20points)P5D(4+%20%21D%3B%205+%20%21S%3B%2018-21%20HCP%3B%2019-22%20total%20points)PPP&p=H4]400|300[/hv]