From judo — literally, “the gentle way” in Japanese (柔道) — I learned to use my opponent’s strength against him. The classic judo move is when someone comes rushing at you and you fall over backwards and flip him over your head. This approach is expressed in Jimmy Cliff’s song The Harder They Come.
From Chinese checkers — known as damas chinas in Guadalajara where I played it most — I learned that the best strategy is not to try and block my opponents, but to leap over them in pursuit of my goal.
From chess I learned the importance of structure and interrelatedness for both attack and defense.
From Sun Tzu I learned that strategy should be like water, always changing, never the same way twice.