s-pente correction

[Mark and Sharon Mammel <msmammel@starpower.net>]

I posted incorrect opening rules for s-pente: the swap is made after 4
or 5:

S-Pente is the same as 2- player Pente except for the following
opening rules suggested by Oleg Stepanov:

  Players are initially referred to as "tentative Ohs" and "tentative
Eks".

   Move#1
          Ohs first move of the game is automatically made to the center
K10.
   Move#2.
          tentative Eks has to make the second move into the central
zone 3x3
            (J-L, 9-11)
   Move#3.
          tentative Ohs has to make the third move into the central zone
5x5
            (H-M, 8-12)
   Move#4   Tentative Eks makes an unrestricted move.
   Move#5a. Tentative Ohs may swap sides after the 4th move.

If no swap was made after the 4th move, no further opening rules are
applied.

If the swap was made:
   Move#5b. Tentative Eks (now Ohs) makes an unrestricted move.
   Move#6a. Now, Tentative Ohs (now Eks) may swap sides.
   Move#6b. Eks makes an unrestricted move and no more opening rules are

   applied.