[goffster]

https://www.bridgeba...CD3%7Cmc%7C8%7C

Not sure if adv robot or not

[steve2005]

playing the Ten ♥ instead of 8 ♥
GIB when it has decided it doesn't matter which spot card matters will play the high card.
Sometime this surety of the result costs GIB

[johnu]

I depend of defense like that when playing against robots.

[s1y4]

The GIB may think partner still has heart 9x, so played 10 first then 8 to partner's 9 to avoid an endplay. The trouble is that GIB do not play defense signals.

[smerriman]

s1y4, on 2024-July-28, 23:42, said:

The GIB may think partner still has heart 9x, so played 10 first then 8 to partner's 9 to avoid an endplay. The trouble is that GIB do not play defense signals.

Yep, pretty much this. By my calculations, 8 is better 15% of the time, and T is better 9.5% of the time, with it not mattering the rest of the time; while that makes it more likely it'll play low, that's easily close enough for a free robot to get wrong once in a while. Similar applies to the trick where it dropped the spade later.

(If you didn't pay for the tournament, it's a free robot.)

[Aceotto]

A hrt was lead robot had a singlton queen and played the king from dummy

[Thranduil]

Here is another game in which GIB defended poorly: https://tinyurl.com/23prjawg

It should have known that I hold 5 spades topped with the 10-9 sequence (declarer dropped the Q under the dummy's K, I gave a positive signal; and later I lead the 10 and declarer took with the ace) - and yet it decided to block our spades suit by keeping the spare jack and discarding all small spades. This allowed the contract to be made, with proper defense on the bot's side, it would have gone down.

[smerriman]

Thranduil, on 2024-July-30, 11:18, said:

It should have known that I hold 5 spades topped with the 10-9 sequence (declarer dropped the Q under the dummy's K, I gave a positive signal; and later I lead the 10 and declarer took with the ace) - and yet it decided to block our spades suit by keeping the spare jack and discarding all small spades.

The robot doesn't make any such cardplay inferences. It does however know for sure that South can't possibly hold four hearts for a 1NT bid, so any case where you hold 5 spades, the opponents are taking every remaining trick whatever it discards.