Single Comment

Regarding the question of whether you can move one king directly up
against
the other since the moving king would be protected by the bishop.
I see questions like this all the time from new players.
Think of it this way: What if the point of the game were to take your
opponent's king rather than put him in checkmate?
Whoever loses his king first loses the game. In the situation noted
earlier (a king that could be captured by the other king except that the
moving king is also protected by a bishop), once one king took the other
king, the game would be over. In other words that bishop would never be
able to take the other king because the game would have ended as soon as
the first king (the one supposedly protected by its bishop) was captured
by the other.
Anyway, that's a simplified way of looking at it. However, as someone
else noted, the original movement of the king up against the opposing
king
was illegal anyway. You can't put your own king in check, period,
whether
or not your king is supposedly protected by another piece that would
retake the piece that took the king.