Spades with no partners: every player scores alone
No partners: every player bids and scores alone.
Three players (Nina, Owen and you) get 17 cards each from a deck with the 2♦ taken out. Four players (Nina, Rosa, Owen and you) get 13 each.
Bidding: after the deal, everyone bids how many tricks they expect to take.
Blind Nil: when you are 100 or more behind the leader, you may bid Blind Nil before you see your cards: +200 if you take no tricks, −200 if you take any.
Playing: follow the suit that was led if you can. If you can't, play anything, including a spade. Spades beat every other suit; otherwise the highest card of the suit led takes the trick and leads the next.
Spades broken: you can't lead a spade until one has been played on an earlier trick (or you hold nothing but spades).
Scoring: take at least as many tricks as you bid and score 10 for every trick bid, plus 1 for each extra trick (a bag). Take fewer and lose 10 for every trick bid.
Bags: every 10 bags you collect costs 100 points.
Nil: bid Nil to take no tricks at all: +100 if you do, −100 if you take even one.
Winning: the first to 500 wins. If two are level at the top when someone reaches it, play another hand.
Playing a card: tap a card to lift it, tap it again to play it — or use Play.
Keyboard: ← → move through your hand, Enter lifts or plays the card, H hint, L last trick, S sort, Escape closes a panel.
Cutthroat Spades is played here for entertainment only — there is no wagering, no real money and no prizes of any kind.