After some more solitaire chess games...

I believe most of the reliability problems are consequence of the information gatherd by the finger press. In portrait mode and with your hand is going to be the thumb, most of the times without nail help. I guess the resistive screen still has to calculate one dot and in many situations when playing fast this can go over the edge of the desired square.

Frequently that square is not valid, resulting in a no-move. The.piece perhaps doesn't get highlighted anymore and you need to start again. Or maybe that square is valid, and you get a missed move.

After playing a bit youcan see that things are just fine even at comfortable blitz speed. For fast blitz and lightining you want to use the stylus. But all this makes sense, actually.

Still, the method to avoid false moves is needed, if only to reassure the user that a game won't be messed just because of one missed square.

It also looks like having the board more on the top, right below the status area, would be better handling the device and playing with one hand. This way the squares on the bottom (the ones you hit most of the times) are reached more comfortably. My reason to separate the board from the top was to avoid false clicks to the menu and status area but probably this is a minor problem.

Good that we can start having discussion and progress based on real testing! And all this only one month after I sent the first post proposing the idea of an online chess game. Amazing!