Appendix V of KNOCK-OUT BLACKJACK concludes that the indices for the Preferred Matrix are "appropriate for any reasonable level of penetration, between roughly 60% and 90% of the pack." Earlier in Appendix V, it is mentioned that the values for A, B, and C (in the Preferred Matrix) might need an adjustment downward in "an extreme case where a 2-deck game has only 50% penetration." The logic goes as follows: in a 2D game with 50% pen., the average RC = -2 [(-4+0)/2], whereas in a 2D game with 75% pen. (the assumption upon which the strategic matrix entry values of A, B, and C were calculated), the average RC = -1 [(-4+2)/2]. So, if I am interpreting this correctly, the following values should be used in a 2D game with 50% pen:
IRC = -4
C strategy plays = -5 (instead of -4)
Key Count/B play = 0 (instead of +1)
Pivot Point/A plays = +3 (instead of +4)
Insurance play = +2 (instead of +3)
Alternatively, the same effect would be achieved by changing the IRC to -3, and using the standard values for C, B, A, and Insurance (-4, +1, +4, and +3, respectively).
Am I way off base on this, or am I on the right path? I realize that the best advice would be to simply not play in such a game, but the selection of games available to me is not very broad; thus, I would be very appreciative of any insights that can be offered to me on this topic. Thanks in advance.
