Sun Pin gave a man advice on winning a bet and said to "Match your worst against his best,Your best against his second best and your second best against his worst." Therefor,the man won the bet against the king. The man won 1000 gold and a place in the army. The man became rich because Sun Ping had been schooled by Sun Tzu in these matters.
Sun Tzu was,at that time,defending the capitol of Ta Liang. The Wei and Chao were at another stalemate. The two attacked at once and the Wei won. This was because of Sun Tzu's guidance. Sun Tzu was very brilliant.