[MarkGritter]

#1: This looks like an AA/QQ split to me. Playing a straight in back is significantly worse.

-1.11606 2s3c4d5h6s 8cTcJsQcKh QdAdAh 12916
-0.361025 TcJsQcKhAd 2s3c4d5h8c 6sQdAh 12916
-0.00263239 6sTcJsAdAh 2s3c4d5h8c QcQdKh 12916

#2: Yuck. I thought the flush/9 low would be best, but the calculator says that full house/T-low is a bit better.

-1.89993 3c4d6c6d9s 3h4h5s6h8h ThQdAc 12831
-1.84545 3c4d6c6d6h 3h4h5s8h9s ThQdAc 12831
-1.34159 4d4h6c6d6h 5s8h9sThQd 3c3hAc 12831
-1.3345 3c3h6c6d6h 5s8h9sThQd 4d4hAc 12831
-1.17645 3h4h6h8hTh 3c4d5s6c9s 6dQdAc 12831
-1.0205 3c3h6c6d6h 4d5s8h9sTh 4hQdAc 12831
-1.01683 4d4h6c6d6h 3c5s8h9sTh 3hQdAc 12831

#3: I would guess 2389K 3579J AAK is as good as it gets.

But I'm wrong again. KK99/AA split with the 8-low is substantially better. (I am actually quite surprised to see such a difference between AAJ and AA3 in front.)

0.421929 2d3d8d9dKd 3c5h7s9cJh KsAcAs 12668
0.449084 3c9c9dAcAs 2d3d5h7s8d JhKdKs 12668
0.582097 9c9dJhKdKs 2d3c5h7s8d 3dAcAs 12668
0.717398 3c9c9dKdKs 2d3d5h7s8d JhAcAs 12668

I am actually wondering quite a bit about how well results for two players actually translate to the four-player game. What I could do is deal four-handed games, set the three opponents according to what the two-player calculator says, and then see whether the best play for the fourth player matches his two-handed play.