Ark223 / BGA

Bridge Gameplay Analysis
MIT License
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Error in strategy, or something else? #9

Open ThorvaldAagaard opened 7 months ago

ThorvaldAagaard commented 7 months ago

Playing in 4H south we reach this position image

Playing HK is wrong as we will lose 2 tricks if CT is together with DA, where we will get 2 tricks with DA onside if playing Diamond first.

If dropping the strategy with reversed opponents we will get the correct result

image

While examining this I found another "error" in the code:

image

this.N is Norths hand but as the suits in a hand are delimited by "." this.N > 2 will always be true.

Was the intention not to use the strategy if only 2 cards left the value should have been 5.

Based on the boards played it seems to favor playing trump, when the opponents are void, because then there are no reversed hands.

When only 20 combinations left the reverse strategy might not be valid.

ThorvaldAagaard commented 1 month ago

I have now finally confirmed, that the strategy favors playing trump when the oppenents are void. Playing in NT the same happens for any suit, where both oppenents are void.

This is a fine example image

This is all about taking the finess in clubs. Following BGA, this will happen

image

Drawing the last trump is just a losing strategy