So how can Afghanistan and its international partners win this war in the long term?

"Then your partner will eventually win a diamond trick and lead a club."

The 'winner' is simply determined by which the player and its partner has won the most hands against the other pair of players.

If one partner wins the game, the other is considered to have won as well, regardless of their score.

South next led the diamond nine, and West carefully played the eight to make sure his partner would win the trick.

His partner won with the ace and returned the three.

He and a partner won a national championship in doubles tennis.

If the partner does win the trick, he is supposed to play any card of the same suit.

The routine move was to play low, hoping that his partner could win with the queen or jack.

His partner would have won and led a second trump.