[benellis58]

Declarer play was what the GIB robots were "best" at - at least compared to everything else in their bridge game...and it is also what the GIBBO robots are "best" at.

However, observe the declarer play of the GIBBO robot sitting West in the hand linked below, and you might conclude (as I have concluded on numerous occasions) that he is not likely to win any brilliancy prizes for his declaring ability!

https://www.bridgeba...H5%7Cpc%7CHK%7C

[benellis58]

West, North, and East are all GIBBO robots. On this board, North proves that he is as utterly hopeless at defending as his East and West robot brethren are.

At trick nine, North makes the monumentally stupid decision to play his ACE of clubs rather than his jack, thereby allowing EW to score up a game that had ZERO play until the GIBBO robot sitting North botched an obvious and elementary play that no human defender who was even halfway competent ever would after the auction that occurred.

https://www.bridgeba...H7%7Cmc%7C10%7C

[benellis58]

West, North, and East are all GIBBO robots. North-South collect 100 for beating East's 3C one trick, and North-South thereby score a decent 88.46% on the board. So why am I writing up the hand?

Because I think we need to expose and publicize North's ridiculous and illogical DIAMOND shift at trick three. Looking at THAT dummy after THAT auction, why would anyone ever think a diamond shift was right? Well, anyone EXCEPT a GIB or GIBBO robot, anyway!

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

[benellis58]

West, North, and East are all GIBBO robots. West opens 1H (promising at least a five-card suit) and later leads his fourth best heart (the five) against South's 2S contract. East can EASILY determine from the auction, the lead (which was correctly fourth best, as per the GIBBO system), and the Rule of Eleven, that South has exactly one heart higher than the five, and that ONE higher heart will be the STIFF ACE (because West would NOT be underleading the ace on this auction). Yet the GIBBBO robot sitting East foolishly, wastefully, and most of all mindlessly, squanders his heart queen, rather than correctly playing his four.

At trick two, West pops his club ace, turning East-West's two natural club winners into only one.

Given that EW trumps break 5-1 and the AQ of diamonds are offside, these defensive misplays might or might not be relevant on the hand, but that does not diminish the issue that both plays were subpar. NS scored 73.81% for going down only one.

https://www.bridgeba...C7%7Cpc%7CS8%7C

[Huibertus]

benellis58, on 2025-December-30, 06:31, said:

Given that EW trumps break 5-1 and the AQ of diamonds are offside, these defensive misplays might or might not be relevant on the hand, but that does not diminish the issue that both plays were subpar. NS scored 73.81% for going down only one.

Yet as long as West does NOT lead ♦Q (which makes it +1) this contract ALWAYS exactly makes, simply by scoring 1♥, 1♦, 1♣, ♠ AK and eloping 3 small spades by ruffing ♥ from dummy and (if needed when West ducked ♦K) forcing West to lead 1 round of ♥.

So how did the bots convince the human to go down?