One more thing if a player has a database of 'Chess engine games' is it fair that the player is using a database?
What if the player starts to use a personal database of random positions as well?
Is it fair at all?
Yes, it is within the rules.
...though completely impossible to discriminate from computer-assisted play if the player wins shortly in the opening.
True, but most short opening wins are already in most databases of human play as well.
One more thing if a player has a database of 'Chess engine games' is it fair that the player is using a database?
What if the player starts to use a personal database of random positions as well?
Is it fair at all?
Yes, it is within the rules.
...though completely impossible to discriminate from computer-assisted play if the player wins shortly in the opening.