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Modern Chess. Variant on a 9 by 9 board with piece that combines bishop and knight moves. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]

Jose Carrillo wrote on Mon, Mar 24, 2008 06:24 PM UTC:

Thanks Antoine!

Can you update the Modern Chess webpage to include the 'Bishop's Adjustment' rule?

http://www.chessvariants.org/large.dir/modern.html

Below is my English interpretation of the rule, which appears in Spanish on page 32 of Gabriel Maura's 1973 'Tesis Matematica del Ajedrez Moderno' (Mathematical Thesis for Modern Chess):

==

The Bishop Adjustment Rule

It consists in exchanging the square of one of the Bishops with either of the adjacent major pieces - the Queen or the Queen's Knight on the right, or the Minister or Minister's Knight to the left - as long as neither of the pieces being exchanged has been moved from its original square.

The player would have four ways to do the adjustment, but he is only allowed to do it one time throughout the game, if he wishes to. This adjustment counts as a move, just like castling. The notation for it is: B=MN (example for the adjustment with the Minister's Knight).