  We show how a theorem about the solvability in $W^{1,2}_{\infty}$ of special
parabolic Isaacs equations can be used to obtain the existence and uniqueness
of viscosity solutions of general uniformly nondegenerate parabolic Isaacs
equations. We apply it also to establish the $C^{1+\chi}$ regularity of
viscosity solutions and show that finite-difference approximations have an
algebraic rate of convergence. The main coefficients of the Isaacs equations
are supposed to be in $C^{\gamma}$ with respect to the spatial variables with
$\gamma$ slightly less than $1/2$.
