Slovenian Tarok: Puzzle R3

SLO-R3 Puzzle

One, trick 10. You are P4, a Defender. The Declarer (P3) found the called Kdiamonds in the talon and took it under the king-rescue, so P3 plays alone and five talon cards are set aside. You lead.

P2Defender
P1Forehand, Defender
P3Declarer

Your hand

Tarok IXTarok XIXQueen of Diamonds

Pad

  • Still out: XVI, XVIII, XX, XXI, C♥, Q♥, K♦, J♣, Q♣, Q♠ (1 of them is the Declarer's discard).
  • P2 has no Clubs or Spades. P3 has no Hearts or Clubs. P3 holds the K♦.
  • Set aside for the trick with the K♦: 5 cards with 2 pips. The Declarer has nothing, plus 1 discard you cannot see.

Which card do you lead?