AbigailII: "Neither is the auto revealing of squares neighbouring a 0 - that will make the game shorter, but it still doesn't pay to reveal information."
But it does work - since you basically *HAVE* to reveal information on every move, since you are no longer able to make "dummy" shots - every shot will at least say something new about at least 1 square. They you have to start to look at your shots - and of course you want to shot somewhere that will reveal as much information about as many squares as possible - since if you just reveal it about 1 square... well then you could be giving your opponent too much information.
Have you tried it yet - I think it works very well.