Two-suit Spider mixes spades and hearts. You can still stack any card on one a rank higher, but only runs of one suit move together and get cleared, so every off-suit card you place is a knot to untie later. Funzzle's daily two-suit deal is one our solver has already won.
It's a real step up from one suit. Our solver won just over half of random two-suit deals within the same kind of search that wins three in four one-suit deals, and its winning lines are about 60% longer. Funzzle's daily deal is always a winnable one, so with patience (and undo) you can win it.
Build on the same suit whenever you have the choice, because only same-suit runs move together. Use an off-suit placement only to uncover a face-down card or empty a column. Keep an empty column free until it lets you sort a mixed run back into suit.
Usually spades and hearts, one black and one red, four of each set of Ace to King, 104 cards in all. Funzzle uses spades and hearts.
Play two suits until you win it regularly. Four suits is much harder: our solver won fewer than half of random four-suit deals, and its winning lines were more than twice as long.