Soldier Chess rules modify Olde Chess to transform your pieces into a modern US Army Brigade, with you as the Brigade Commander. These rules can be used selectively to tweak the game a bit, or to overhaul the entire look and feel of Olde Chess. While playing, you will learn valuable US Army tactical concepts like Relative Combat Power, Combat Resolution, Decision Points, High Payoff Targets, Fragmentary Orders, Named Areas of Interest, Priority Intelligence Requirements, Fragmentary Orders, flank and rear attacks, counter-attacks, supporting an assault by fire, and the positive effects of good Non-Commissioned officer leadership. You will have a greater appreciation for the effects of terrain, and a greater understanding of the contributions of the various Battlefield Operation Systems. The effects of Murphy’s Laws of War will ensure that anything that can go wrong, will go wrong... and level the playing field between new and experienced players.
And you don’t have to play all the rules all the time! Negotiate with the Enemy Brigade Commander and play just the rules you want.
Description taken from http://s2company.com/chess/