Making a bet of exactly 2, 1, or none is also very difficult, and is rewarded as follows:
Anyone who bets 2 and gets 2 wins 40 points (instead of 20). If you get 3, you still get 20 points (one bag). Four tricks is worth nothing, and every additional bag is -10 each (per usual).
Anyone who bets 1 and gets exactly 1 wins 60 points. If you get 2, you also get nothing, and each additional bag is again -10 each.
Anyone who bets none and gets it is entitled to 100 points. Otherwise, subtract 10 for every trick taken (just like regular bags).
Blind: You may decide to not look at your cards and just bet. This wills double all points. For example, if you bet and win 5 tricks, you gain 1000 points. However, if you miss, the penalty is also double (in the 5 trick case, 100 points).
SPADES FOR TWO PLAYERS
There is no deal. Instead, the deck is placed face-down between the two players, and they take turns to draw cards.
At your turn you draw the top card, look at it (without showing to your opponent) and decide whether you want to keep it.
If you want to keep it you put it in your hand, and draw the next card, which you look at and must then discard face down;
If you decide not to keep the first card you discard it face down and then draw the next card, which you put in your hand.
It is then the other player’s turn to draw. This continues until the stock is exhausted. You then each have a hand of 13 cards and have discarded 13 cards.
Now each player bids a number of tricks, and you play and score according to the same rules as for three or four players. 
