The key to this scenario is that the Soviet force does not have the "oomph" to throw the Finns out of the town. Despite their numbers, even cavalry defending in a town will hold or at least contest control of the town when faced with a lower morale attacker. Add in relatively small numbers of uninspiring leaders for the Soviets and you have a recipe for the Soviets being unable to reach their victory conditions.

This leaves that imposition of losses on the Finns as the primary rationale for the Soviet action. By causing 6 step losses the Soviets will keep the Finns from winning (and will reach their historical result).

The Soviets will get into the town as the Finns do not have sufficient force to deny entry. It is possible to get carried away as the Finnish commander and try to use your cavalry in assaults outside of the town (to get the charge bonus). Agression of this sort is the only way the Soviets can win the scenario. It is fun to get that +1 bonus but the ultimate result is cavalry in open ground while artillery lands all around. Just don't do it.

The idea of a relatively passive Finnish force may not sit well but the goal is to keep your losses low. Feel free to give ground in the latter part of the scenario in order to avoid getting pinned down and taking those losses. Use your mobility to continually change the part of town that you hold and to avoid strong Soviet concentrations.

In the end, use the name of the scenario to guide you. This is not a cavalry "battle" it is a cavalry "screen". Act accordingly and a victory could be in reach. This was a tense battle all the way to the end. I give it a "4".