📝M Winther wrote on Thu, Jul 23, 2009 04:23 PM UTC:Good ★★★★
The underlying reason for this dropping method is that the external pieces are forced to make an entry soon. It creates a flow in the game. If all the pieces develop and no entry is done, then the pieces cannot be introduced. If they were allowed to stay outside and enter at any time, then the game would be strategically unclear. It wouldn't be possible to decide for a plan because you wouldn't know what forces the opponent has prepared. It is not proper for Western chess which demands planning and foresight. So it's a good idea. In my Pioneer Chess I go even further. The players, in their first move, must decide from which file they aim to introduce the external piece.
http://hem.passagen.se/melki9/pioneerchess.htm
/Mats