Doubling 9v8

[Dyepaintball12]

How much do you lose doubling a 9 v 7 or 8?

[Sonny]

Doubling 9 vs. 7 is actually the correct play in + counts. Doubling a 9 vs. 8 changes the hand from +EV to -EV so you wouldn't want to do that. Here are the actual numbers:

http://www.bjmath.com/bjmath/ev/ev.htm

-Sonny-

[Renzey]

Originally Posted by Dyepaintball12

How much do you lose doubling a 9 v 7 or 8?

With 9 vs. 7, you win the hand 59% of the time if you hit and 53% of the time if you double (with a neutral count). That's counting pushes as a half win and a half loss. Doubling becomes correct with this hand at +3.5 true Hi/Lo, at "25 running" with KISS and at "+2 running" with KO in shoe games.

With 9 vs. 8, you win 55% if you hit and 49% if you double. It becomes correct to double at +9 true Hi/Lo, at around "36 running" with KISS and at about +16 with KO.

[zengrifter]

I've done it correctly a few times with stratospheric counts. zg