Another form of not unblocking is the following:—Y leads the knave of spades, which wins; he then leads the king of the same suit. Z, his partner, held originally ace, three, and two of that suit. When Y leads the king after the knave, Z ought to know that his partner led originally from five spades headed by king, queen, knave. It is therefore Z's duty to play his ace on his partner's king, and thus unblock his partner's suit. Z now knows that, as his partner led originally from five spades, and he held originally three, making eight, a third round of spades must be trumped by one of the adversaries. Y, if he knows his partner to be a sound player, will feel certain that his partner holds one more spade; because, had his partner held ace and only one other spade, he would
have played the ace on the knave, in order to unblock his partner's suit.
To be able to thus aid a partner, the leads must be thoroughly known, so that from a partner's original lead it may be fairly estimated what other cards of the suit he holds in his hand, and when, consequently, it is desirable to unblock his suit.
On Placing the Lead.
The player who has to play last has an advantage over the other players. If this last player hold the king and one other card of a suit, he is certain to make a trick with the king, unless it be trumped. If this last player hold ace, queen of a suit, he is certain to make them both, unless one or the other is trumped. Towards the end of a hand, and when a fairly correct estimate may be formed of where certain cards are located, it is of the utmost importance to place the lead either to the right or left, according as you wish your partner or yourself to be led up to as last player. Some simple examples such as the following will illustrate these cases.
A player, Y, holds the king and one other trump (spades), and one trick is required to win the game; he holds also a winning heart. His partner Z plays a thirteenth diamond, which is not trumped by the second player, who discards a heart. The ace and queen of spades are in hand somewhere, and may both be held by an adversary. Y must therefore play his winning heart on the thirteenth diamond, when the left adversary, after trumping, must lead up to the king of spades guarded, when consequently the king must win a trick, and the game. Simple
at this proceeding is, bad players will frequently fail to grasp the situation, and will indulge in vain imaginations, such as that their partner has played this thirteenth card in order to ask for the best trump to be played on it. Or that the partner holds the ace of trumps, and fears to play it out, lest he might catch his partner's king, not perceiving that, if that is so, the game is a certainty in any case. Such singular ideas are by no means uncommon with the bad player.
Each time a player leads a fresh suit in which he is weak, he is playing a dangerous game, inasmuch as he is giving an adversary the advantage of being last player. It is a common error of the bad player to change the suit at random, when he finds his partner possesses little strength in the one originally led by him. He thus continues to sacrifice his partner, and loses trick after trick. The following is an example from actual play. A held queen, eight, five, and two of spades, ten, eight, and three of diamonds (trumps), knave, eight, five, and two of clubs, the six and four of hearts.
B, his partner, held king, and two small spades, king, and two small diamonds (trumps), king, and three small clubs, king, and two small hearts.
A led two of spades, B played king third in hand, which was captured by ace in the fourth (Z's) hand.