lrozenblyum/chess — pull request #43 by lrozenblyum (2013-05-09 13:08:36+00:00)
Title: Pawn movement

The promotion of pawn to queen (rule 3.7e) implemented.
Queens are taken into account when they have influence on pawn's movement according to rules
3.7a-3.7d (at least according to current implementation).

However condition 'unoccupied' from 3.7a-3.7b is still NOT YET implemented.