The game plays as a normal (whist is a very basic trick-taking game) with the last card dealt face-up to determine the trump suit. The variation is simply this -- the other suit with the same color as the trump suit is now the "point suit". So if hearts is trump, then diamonds is point, if clubs is trump then spades is point, etc.
New Rule A: You get points at the end not by how many tricks your partnership takes, but by how many point-suited cards your partnership has taken (This rule is borrowed from hearts).
Also, to prevent the partners with high point suits from dominating the game early, the "breaking hearts" rule is used, whereby you cannot lead with a point suit until a point suit has been discarded.
New Rule B: If you lead with a point suit, then any other suit can trump it. (Trump will trump non-trump trumps, obviously).
(Personal Note: This variation also makes use of the fact that there are four suits but only two colors in a traditional deck, which always bothered me a little.)
Are there any problems with this variation which make it unplayable, or unbalanced?
Is there a way to exploit the rules, or a way to play where understanding the rules more deeply conveys an advantage?
Does this variation add to the complexity and fun of the game, or is it merely a complication which adds nothing unique or interesting to standard whist?
Would the game play better with only one of the rules rather than both?