If you don't play a game, then you won't win that game.
If you don't bluff at poker, then you won't win at poker.
Thus, if you don't bluff at poker, then you don't play poker.
Answer: If you assume that the conditional and fact above are true, must the conclusion also be true?
Yes, the conclusion must be true if the conditional and fact are true.
No, the conclusion might be false even if the conditional and fact are true.