Fuente: ANDREW’S TIP: With trump length, lead length.
There are two diametrically opposite defensive strategies against trump contracts. You can lead from shortage and try to make your trumps by trumping; alternatively you can lead from length and try to force declarer to shorten his trumps so you gain trump superiority.
West correctly led 4 to East’s Q and declarer’s A. At trick two declarer led 3 to dummy’s Q and continued with K. West took his A and played a second . Declarer trumped and realised that if he drew all West’s trumps he would have none left himself. He correctly played 5 to dummy’s K and East’s A. East played his third and declarer reluctantly trumped. He played a second and West trumped and played a fourth . Declarer trumped in hand with his last trump. Unable to reach dummy to draw West’s last trump, declarer played a third . West trumped to defeat the contract.
Note that if West had led 7 rather than 4, declarer would make 4 easily; East would win A, lead a second for West to trump, but he would only score his A in addition.
ANDREW’S TIP: With trump length, lead length.