Author: Steve Coladonato
Date: 15:10:39 04/22/99
Go up one level in this thread
On April 22, 1999 at 15:46:27, Jeremiah Penery wrote: >On April 22, 1999 at 14:45:19, Steve Coladonato wrote: > >> >>On April 22, 1999 at 14:26:24, Jeremiah Penery wrote: >> >>>On April 22, 1999 at 13:05:04, Steve Coladonato wrote: >>> >>>>At one time, there was a rule in chess that in the case of a known forced mate a >>>>player was allowed the standard 50 move rule or twice the number of moves with >>>>best play to execute the mate. The KNB vs K ending is a 34 move ending with >>>>best play. Therefore a player was allowed 68 moves to effect the mate. Does >>>>anyone know if this rule is still in effect? >>> >>>Can you post a position for this? The longest ending of this type that I've >>>seen is something right around 50 moves. (The losing king is in the wrong >>>corner) >> >>The 34 moves was from any position on the board. I'm sure that there are many >>positions which do not require the full 34 moves and a few which would. Which >>positions would require the 34 moves, I don't know. >> >>I haven't seen any documentation on this in recent books but back in the 70's >>there was quite a bit available. Unfortunately, I don't have any of those old >>books around. I think the basic mates were as follows: >> >>KQ v K - 9 moves >>KR v K - 12 moves >>KBB v K - 20 moves >>KNB v K - 34 moves >> >>Again, from any position on the board, mate could be accomplished within the >>number of moves above with best play. > >Ok...Perhaps you're thinking that 34 moves (68 ply) is surpassing the 50 move >rule, but it isn't. 50 moves (100 ply) is needed for that. There are no KBN >vs. K endings that take so many. Jeremiah, KarinsDad's reply to this post is correct. At one time I believe there was a rule which allowed you to exceed the 50 move rule in the case of a known forced mate where with best play twice the number of moves exceeded the 50 (100 ply). The KBN ending fits this scenario. I have posted a query to the USCF concerning this. Perhaps they will be able to verify it or not. Steve
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.