P2 announced Valat and everyone else passed; you are P4, and play has not started. Your hand: K, Q
, C
, J
, V, IV, Q
, J
, 1
, 10
.
P2Declarer








10 cards










Valat
P1Forehand, Defender








10 cards










Pass
P3Defender








10 cards










Pass
Your hand










Do you say Kontra? You kontra only an item you can be sure must fail.
Answer
Do not say Kontra. In a Valat the Taroks trump, so your K
wins only if Hearts are led and nobody trumps, and once P2 wins a trick P2 leads and need never lead a Heart; your V and IV lose to any higher Tarok. Nothing in view proves the Valat fails: if P2 holds ten high Taroks, P2 wins every trick.
Rule: If you believe that the Declarer will not deliver the contract, you may say Kontra; here you say it only when the cards prove it.