Remove certain pairs and track new ones
An organized hand reduces mistakes: after drawing, immediately check whether a pair formed. This keeps the number of unknown cards clear and removes unnecessary noise.
Pairs discarded by other players matter too. They show that a drawn card matched their hand and reduce the set of ranks still in play.
Remember events, not complete hands
You do not need to memorize every card. Track who held a suspicious card for several turns, who drew from them and whether a pair was discarded immediately afterwards. These changes matter more than an old hand layout.
Card order or position may change online, so do not rely only on visual placement. Reasoning from game events is more robust.
Do not invent certainty in a random draw
When choosing from hidden cards, no screen position remains permanently safe. Avoid superstitious patterns. Any real advantage comes from tracking previous transfers and discarded pairs.
Also notice how many cards remain in the other hand. With fewer cards, each earlier event narrows the possibilities more strongly than it did at the start.
Update your conclusions in the endgame
As hands shrink, reassess old assumptions after every draw. If a player keeps one unmatched card and later passes it on, the path of that information can be followed even without knowing the exact rank.
Luck remains part of the game, so a good decision cannot guarantee a win. Strategy reduces the chance of an unfavorable draw; it does not remove randomness.