Author: KarinsDad
Date: 12:43:07 09/20/99
Go up one level in this thread
On September 20, 1999 at 07:15:14, Anthony Bailey wrote: >On September 19, 1999 at 18:40:30, Larry Applebaum wrote: >>Pardon me for being dense here, can you post a position which leads to >>a double check by two queens? > >Eugene Nalimov: >>White queen H7, white pawn G7, black king F7. White moves G8=Q. You can put >>white king and a lot of pieces anywhere on the board. > >And of course, also there's the en passant option: >White queens a2 and a4, White pawn a5, Black king a6, Black pawn b7. >White checks with either of his queens Qc4+ >Black interposes b7-b5 >White takes a6xb5 ep, giving discovered checks with both queens. > >Not likely in practice, but a great favourite in retrograde analysis, etc. > > - Anthony. Yes, this is an interesting problem for move generators as well. Since my move generator does not generate illegal moves like most move generators, I had to put in special code to handle both the taking and the taken pawn via e.p. and attacks through their associated source/destination squares. KarinsDad :)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.