How do I replace deck boards

[Txmat]

Not sure this is the right place for this question. I have some deck boards that have curled up at the end near the pool. I need to replace the curled up part. (See pic.) I also have boards I have to remove at least part of the board (need about 2 inch clearance to remove cap and only have 1/2 inch) in order to remove the top rail connector caps. (see pic) I cannot remove the entire board because another deck is built over part of the board covering up the screws on that end. How do you suggest I deal with this? There are two 2X6 joists supporting the deck boards about one foot from the end (can be seen in pic) One thought I had was to take a reciprocating saw and cut off the end of the deck board somewhere around the joists and then replace the cut off damaged portion. If I do that where should I cut? Are there better ways to deal with this?

As always thanks in advance

 

[woodyp]

Cut it off somewhere between the two joists. Add another 2x6 between them to nail too?

 

[Txmat]

How do I add the other 2X6? Do I add it parallel to one of the joists or perpendicular between them?

 

[Txmat]

Bump

 

[imwarren]

parallel to joist right up against the joist for a place to nail the new board down.

 

[Txmat]

Thanks