In Qunidici you must take cards whose combined total is 15. The scoring is the same as Scopa. In the example above there are 3 denari. (3 Diamonds in your regular deck of playing cards.)

Player One could lead with his cinque di spade. He would take the quattro di denari, and the sei di denari  5 + 4 + 6 = 15.

Player One has acquired 2 denari and 3 cards.

Player Two leads with his sei di spade. He does this to set up his next play, taking the sei di spade back with his cavallo di denari 9 + 6 = 15. Player One has two kings, (due re) each representing 10, there is no way for Player one to pick up a 15 point combination. Player Two has created an opportunity for himself.

If it were Player Two’s lead he could take the sei di denari with his cavallo di denari. This would give him two cards and two denari.

Now Player One cannot use his cinque di spade to make that 3 card combination and if Player One played his cinque di spade, Player Two would have another chance to pick up cards.

Can you see it?

If Player One leads with a King, what could Player Two do?