Oh Hell

Yes. No account, no download and no limit on games.

Three or four. Pick the table size in Settings: four is you and three computer players, three is you and two. With friends you choose the size when you make the game. Pagat.com says the game takes 3 to 7 players and is best with 4 to 6.

Yes. Tap Play a friend, pick three or four players, then a friend or the computer for each of the other chairs. Each friend gets their own link to open, sent by text, email or chat, and the cards are dealt once everyone's in. The computer plays any chair you leave to it. Each of you only ever receives your own cards. If someone closes the page, opening it again picks up the same game. A friend game with no moves for 14 days is deleted.

That's the hook rule, the main rule on pagat.com. If the dealer could make the bids add up to exactly the number of tricks, everyone might make their bid. With the hook, at least one player will miss. You can turn it off in Settings. In our test games between strong computer players, the dealer made their bid 49% of the time, against 56% for the other players.

The strong player counts its likely tricks from its trumps, aces and short suits, with the count tuned on 133,000 simulated hands. Then it plays to hit its bid exactly: it wins the tricks it needs, ducks once it has them, and once its own bid is lost it tries to make the others miss. One strong player against three easy ones won 668 of 1,000 games, where an even share would be 250. No computer player ever looks at another hand.

Yes. During the play it marks the card the strong computer would play and says why, like "you have made your bid, so lose this trick." You get 6 hints per game, and asking again about the same move doesn't use another one. The suggested bid on the bid panel is always free.

No. Once a card is on the table, everyone has seen it. To stop slips of the finger, a card takes two taps to play: one to pick it up and one to play it. If you'd like one tap instead, turn it on in Settings.

Yes. Settings can make the biggest hand 7 cards, which gives 13 hands instead of 19. You can also start with 1 card and go up, and score 1 point a trick plus 10 for an exact bid, the scoring pagat calls the most widespread.