I have produced a Tercios army list for the battle of Słobodyszcze, based on Łukasz Ossolinski's study of the 1660 campaign. It results in two pretty large wargame armies so I created further lists at 66 and 50% of starting strength. These broadly follow the proportions in the real armies, but with some types a little over -represented, especially hussars and Polish foot.
For games using Pike and Shotte or Maurice, the number of mounted units should be halved, since cavalry units in Tercios are squadrons not regiments. However, the size of units should be roughly doubled so the broad numbers of figures remains the same.
The Commonwealth army is pretty straightforward to represent. The shortage of Foot is striking: Lubomirski deliberately selected a fast moving, mostly cavalry force to surprise Khmelnytsky.
The Cossack army is tricky to represent. It included a great many troops who had mutinied against their Commonwealth paymasters and joined the rebellion. In Commonwealth pay these had been known as Registered Cossacks. They wore uniforms and were better trained and experienced than the Zaporozhian regiments recruited direct by Khmelnytsky. In the absence of reliable information about the make-up of the army, I arbitrarily divided the Cossack regiments 50-50 between Registered and Zaporozhian foot. In gaming terms the Registered troops have slightly better staying power although both fight well.
Another task is to represent the defended wagons around the Southern perimeter of the Cossack camp, the so-called Tabor. In the battle, Khmelnytsky lined his wagons with part of his force but held back several formed regiments which counter attacked the Commonwealth and ejected them from the camp. I allowed the Cossack player to convert up to half of its regiments into defended wagons, on a one-for-one swap.
The next task is to produce the map of the battlefield. I have started one on Sketchpad, using the map on Wikipedia. It's a pretty basic one but should do the job. I just wish I had more talent for producing a polished final product.