Ruy Lopez, Exchange Variation grandmaster play by Emanuel Lasker, and later invigorated with new ideas by Bobby Fischer. The Exchange Variation can be a powerful psychological weapon. Black is forced to play actively, which is psychologically difficult if all one needs is a draw. Lasker's famous win against Jose Raul Capablanca in the St. Petersburg 1914 chess tournament is an example of this. With a lead in the tournament, Capablanca was intent on simplifying the game to obtain a draw, but faced with the Exchange Ruy he played too passively and was routed by Lasker as a result. 4...dxc6 is the main recapture. Black's
War and Peace (game) commanding general's box, reducing clutter on the map), while the alliance chart, force pools, and prisoners are on the campaign game card. Player sides are: France (blue), Spain (yellow), Britain (red), Austria (white), Prussia (gray), and Russia (green). The markers for Fortresses, entrenchments and demoralization are black. Tactical matrix markers (see below) are white. Strength points are also rated for what the game calls "morale" (a proxy for troop quality). Militia, landwehr, partisans and cossacks rate "0". Regular infantry (yellow lettering for minor countries, or black for Prussian, Austrian or Spanish regulars) rate "1". British, Russian and French infantry (white