
Bughouse for Beginners: Don't not move your King's Pawn
If you've ever played in the random pool, you've undoubtedly played a game where your partner's board looked something like the following, with White to move.
Here White is going in for the kill. Nxf7, Kxf7, N@e5+,Ke8, and B@f7+ is annoying for Black, who has to defend all game, or quickly evict all of Black's pieces from the vicinity of the Black King. Here I dropped a Knight at e4. It's an OK move. It might have been better just to play Nf6-e4.
This hits the g5 Bishop and the f2 pawn. White trades Knights on e4 and sacs on f7.
Trading on e4 helps Black develop. It gives him control of the g5 square, and decreases White's control of the e4 square. Sacrificing on f7 is unwarranted. White isn't well enough developed to attack.
Here Black has to make sure that Queen isn't dangerous for his partner. Since it isn't, Black can press his dark square advantage. White can take Black's Queen on d8, but if it doesn't mate instantly on the partner board, White will suffer immensely after p@d2+.
This develops Black's Queen to a strong square. Since Black controls the center, and has made space around his King, it is White who is in danger.
P@f7+. White has Queen and Knight in hand. But it doesn't really do anything for him after...
White tries to shore up his dark squares and increase the battery along the a3-f8 diagonal by placing B@c5. But since Bxd6 would not be check, I went ahead and played...
White throws in p@e7+, which is harmless as long as Black is half-awake.
Taking with the Queen keeps it simple. After this, White played Q@f3, which loses at least one Queen after exf2+.
The game was quickly concluded because the Queen helped my partner win simply. I also caught this game live, for anyone wanting to see it in its entirety. https://www.twitch.tv/videos/415734257
Concluding remarks
It is probably better to have both the e and d pawns moved only one square, than to have only one of the e or d pawns moved two squares. This post has focused entirely on the dangers of moving only the d pawn, but there are also dangers involved with moving only the e pawn. In particular, the f4 square will be weak, and a Knight dropped there can't be captured. In any case, this post hopefully gives you a sense of the dark square problems (or light squared if it is Black) which arise when the King's pawn is not moved.