[smerriman]

There are two stages to Gib's defense. 1) It simulates hands consistent with the bidding/play so far, 2) it runs a Monte Carlo simulation with double dummy analysis and picks the card to play that results in the best average.

I can't see how there can ever be a bug in 2). It's double dummy analysis is perfect, and there is really very little logic involved with running a simulation.

Bugs such as Gib randomly throwing a vital high card really therefore have to be due to flaws in 1) - it must be making some inaccurate assumptions based on what has happened so far that causes it to think nothing it does matters.

---

Fastforward to West on lead at trick 6.

From a daylong tourney, so basic Gib. This means less simulations than advanced, but still some reasonable number.

How could a simulation possibly result in a club lead being equal or better than any other lead? (Clearly not better, which means every simulation had it equal.. but surely that couldn't be.)

[iandayre]

Deleted