If you see that your opponent is almost finished with a meld but hasn't done so yet, you can advance your own strategy while blocking their progress by playing a card they need. This proactrammy ollaive approach necessitates close observation & knowledge of both your opponents' and your own hands. Keeping your poker face is crucial for hiding your plans and tactics from opponents in any card game, including Kash Rummy. By keeping your expression neutral, you can keep people from figuring out how strong or weak your hand is based on how you respond to draws and discards.

rammy olla