The real battle took place after Oudinot had retreated to Polotsk after the Battle of Klyastitzy. General Wittgenstein attacked a Bavarian force that was slightly separated from the main French body in an attempt to destroy it before the French could react. In the heavy fighting that took place Marshal Oudinot himself was wounded and the losses to the Bavarian troops were very heaving including the loss of much of their General Staff. In the end the French forces would prevail, but the attack by Wittgenstein in effect put an end to the northern advance towards St. Petersburg.
Our game was slightly altered as we didn't really have too many Bavarians in our collections and my freshly painted Swiss and Croatian troops yearned for battle. Historically the Swiss 9th Division was mainly a reserve force during the battle being stationed across the river in the town of Polotsk separated from the main battle that raged around the town of Spas which the Bavarians defended.
The battle concentrated around the small town of Spas with the Russian and Swiss forces being engaged in a constant point blank firing and close quarters fighting. Casualties were heavy on both sides with the opposing divisions in the area being in effect decimated. The game ended with both sides having to withdraw due to heavy losses. Being on the French side I naturally considered it a moral victory as my Swiss troops were able to hold the Russian bear at bay.