Yes, it was very well said, RsBaby. But how does changing how a piece moves in chess the same as how a move can be made only in certain situations the same? If the rule in chess was changed so that knights could moved 3-1 and/or 2-1 it would change the whole game, it's strategy, everything. If this rule in backgammon is not used, it is still very close to backgammon. In comparison, very few moves are changed. So if you are going to give an example as comparison, please come up with an example so that the rule only affects considerably few moves of the game, not every one. Thank you.