1. Where is the ♣A?
   With South. You have 13 points, the dummy has 14, and the declarer has at least 9 for their jump. That leaves your partner with a maximum of 4 points, and you've already seen the ♠Q from partner's hand.
2. Where is the ♠J?
   With your partner. Their play of the ♠Q promises the ♠J.
3. Where is the ♥K?
   With the declarer. Otherwise, they wouldn’t have enough points to justify jumping to 2♥.
4. Where is the ♦Q?
   Likely with the declarer, unless they bid 2♥ with a more distributional hand and fewer points.
5. What will you play next?
   Continue with a low spade to your partner's ♠J.
6. You played a low spade, and your partner won with the ♠J, then continued with a third spade to your ♠K (declarer followed suit on the third spade). Now what?
   Play your fourth spade. The only chance to set the contract down is by promoting a trump trick, hoping your partner holds the ♥10. Partner ruffs with the ♥10, declarer overruffs, and your ♥J is promoted as the setting trick.

Things to remember:

1. When you lead a top card and your partner follows with an honor, they promise the honor below it. So, with Qx or Jx, your partner should play low (playing the J promises the 10). If they later follow with an honor, you can conclude they have a doubleton.
2. A non-jump suit response to a takeout double shows 0–8 points. With 9–11 points, you need to jump, and with a game-forcing hand, you can cue bid to show strength.
3. Promotion is a defensive technique used to develop a trick in the trump suit, even when it initially seems unavailable. Example:
   

4. Heart is trump and it seems declarer has no losers in the suit.  West, who overcalled with 2♣, leads the ♣K to East's ♣A and get a Club return to their ♣J. West then plays a low Club, and East ruffs with the ♥J, forcing declarer to overruff with the ♥Q , and by that promoting West's ♥10. Another example:

5. Heart is trump, and it seems the declarer has no losers in the suit. East overcalled 2♣, and West leads the ♣A, continuing with a second club to East's ♣J. A third club from East forces the declarer to ruff with the ♥Q (otherwise, West ruffs with ♥J ), thereby promoting West's ♥10.
6. When the defense is trying to promote a trump trick, it is very important to cash all side tricks first before playing the side suit that enables the promotion. If they fail to do so, the declarer could choose to discard a loser from that suit. The declarer would still get ruffed, but they would avoid losing a sure trick that they should have to lose
   In the hand above, it was clear that the partner couldn't have the ♣A for two reasons:
   1. By counting points, it was evident that the partner couldn't have more than 4 points. After seeing their ♠QJ, there was no room for the ♣A.
   2. Even without a point count (in a different situation), if the partner did have the ♣A, they should have cashed it after winning the ♠J and before playing their third spade. Since they didn’t do so, it was clear they didn’t have it.
7. Counting partner's points is extremely useful for understanding what to expect from their hand. In this case, analyzing the partner’s cards helps determine that the best chance for four tricks is to hope for three spade tricks and promote a trump trick.