The top card is your starting point
Classic Canasta lets you draw one stock card or take an eligible discard pile. A pickup takes the whole pile, but you must first show that you can use its top card. Cards buried underneath cannot help prove that you are allowed to collect them.
A black three or a wild card on top blocks pickup. A wild card buried in the pile freezes it; the initial deal can also leave a red three buried there. The game also applies frozen-pile restrictions to a team that has not opened.
Frozen pile example
The pile is frozen and its top card is a Queen. If you hold two natural Queens, you can propose those two cards with the top Queen. If you hold one Queen and a joker, you cannot use that pair to unlock the frozen pile. An existing Queen meld on your team's table does not remove the two-natural-card requirement.
If your team has not opened, the pickup must also meet the opening minimum. Three Queens total 30. With a minimum of 50, they are insufficient by themselves; other legal melds from your current hand must make up the difference. Do not count the buried cards or a future canasta bonus.
When the pile is not frozen
After your team opens, an unfrozen top card may be added to an eligible matching meld already on your team's table. Other eligible pickups can use matching hand cards, including a natural card with a wild card when the resulting meld is valid.
A black three on top still blocks that turn's pickup. Blocking and freezing are related but different: a blocked top card cannot be taken now; a frozen pile may still be taken with the required natural pair.
Using the pickup controls
Select the matching cards from your hand and tap Take pile. If you need additional groups for the opening, prepare those extra groups with Add meld first, then select the pickup pair. Choose an existing destination using the selector below the melds when appropriate.
The server checks the top card, selected cards, opening total and any going-out restrictions together. If the move is rejected, none of the proposed cards leave your hand. The message describes the failed condition so you can revise the plan.
A legal pickup is not always a useful pickup
Taking the pile can bring valuable matching cards, but it can also leave you with a large hand. Consider whether your team can play those cards before an opponent ends the round. The visible top card tells you whether a pickup is possible; it does not reveal the quality of every buried card.
A decision you can make from the visible cards
Read the visible top card, then check whether the pile is blocked, frozen or subject to the unopened-team restriction. A Queen on top and two Queens in your hand satisfy the matching-card part of a frozen pickup. A Queen on top and a pair of Kings do not. Suits do not need to match for this rank group: a Queen of clubs and a Queen of diamonds can match a Queen of hearts.
After your team has opened and the pile is genuinely unfrozen, a top Queen may instead be added to your team's eligible Queen meld. Do not apply that shortcut while the pile is frozen. In either case, it is your team's meld that matters; the opponents having Queens on the table does not authorize your pickup.
Why an apparently matching pickup can fail
Matching the top card is one test, not the whole move. An unopened team must meet its point minimum with a complete legal plan. A proposed meld must obey the limits on wild cards and the size of completed combinations. The resulting hand must also respect the conditions for ending a turn or going out. Satisfying one of those tests does not override another.
Read the rejection as a statement about this proposed action. If it says the opening is too small, review the points in your current hand and the visible top card. Do not add guessed values for hidden cards beneath it. If the plan would empty your hand illegally, keep enough cards or use a different plan. A rejected proposal does not spend your turn or change the saved cards.
Try a small table exercise
Place a Queen face up and imagine two Queens in your hand. Ask whether your team is open, whether any relevant pile restriction applies, and whether the resulting group can be used legally. Now replace one hand Queen with a Joker and ask the questions again. The change is small visually, but it can remove the specific qualification needed for pickup.
Finally imagine that the pile contains many cards. Ask a different question: would taking them help your team finish combinations before the round ends? Legal access is a rules question; whether to use it is a strategy question. If you cannot justify both, drawing from the stock is a valid way to continue learning without forcing a pickup.