Napoleon system - combat resolution

About Preussisch Eylau 1807, from BoardGameGeek:

The game simulates the Battle of Preussisch-Eylau, East Prussia, on 7 and 8 February 1807, between Napoleon's Grande Armée and the Imperial Russian Army, who were reinforced by Prussians. The game box also contains a few additional maps (and counters) for other smaller battles that took place at that time in that area: battle of Putusk 1806, Goymin 1807, Bergfriede (Barkweda) 1807, and Waltersdorf (Wodowo) 1807.