This is a very fun game to play. The game requires some planning and team work between partners. Never play a low card when your partner has gone null. Null playing is a high risk, but with low amount of spades (and they are cards under 10). Never go null if you have an ace of spades, or king of spades, or queen of spades or jack of spades. Read helpful hints of playing the game.
Krimbill about Spades+