points cell to increase by 1 when cell B3 increases by 1
That's not possible using formulas, because we do not know the previous value of B3.
For example if the value of B3 in my file is 123, you do not know if it was increased or decreased.
Theoretically, you have to make a copy of the whole sheet to keep the old values as backup. Now in your sheet if a cell is changed you can use VBA and look into the backup sheet into the same cell, e.g. in there is 95 and you know the value is increased. At this point you can add 1 to the cell that contains the points.
Possible, but you lost the ability to sort / insert / delete rows (any action that moves cells).
Andreas.