• Win the first trick with the AC
• Lead heart from South to North Ace
• Lead the ace of spadesand discard the king of diamonds
• Lead 7 of spades and trump
• Lead a heart to north king
• Lead queen of spades and ruff
• Lead the remaining heart to north
• Lead the heart from north and pitch diamond Ace
• All the diamonds are now good

Voila, there are your 13 tricks

Now wasn't that easy