From Mate in 18 to draw with no error?

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7th July 2009, 12:34pm
#1
by IPA-Ray
South Park, PA United States
Member Since: May 2008
Member Points: 402

White to move. Computer Analysis says that White has Mate in 18. White's next move was 49. Kb3. The computer does not give the move a ? or ?! but lists the game as almost dead even (+0.01). How can White go from a forced mate to a draw without making a questionnable move? Was there really no forced mate?

7th July 2009, 12:55pm
#2
by Scarblac
Arnhem Netherlands
Member Since: Nov 2008
Member Points: 1684

Computer analysis isn't that strong, sometimes it just doesn't see far enough. But since it did see it, and then also saw that Kb3? is draw -- it should have called it a blunder. Weird.

As far as I can tell, white wins by immediate breakthrough:

7th July 2009, 01:01pm
#3
by IPA-Ray
South Park, PA United States
Member Since: May 2008
Member Points: 402

I saw h5 too late and blew the win. I think Kb3 deserves ??.

7th July 2009, 01:04pm
#4
by bondiggity
United States
Member Since: Jun 2008
Member Points: 1532

h5 is mate in 18 (check t-bases). It's possible that the computer analysis is using a mix of t-base results and its own results and the integration of the t-base results isn't so smooth. 

 

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