Why not try to implement my idea given here
http://www.talkchess.com/forum/viewtop ... 97&t=42677. That would lead you to search a much smaller tree hopefully
Good luck!
Kind regards
Pio
An Evaluation Mystery ?
Moderators: hgm, Dann Corbit, Harvey Williamson
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Pio
- Posts: 334
- Joined: Sat Feb 25, 2012 10:42 pm
- Location: Stockholm
Re: An Evaluation Mystery ?
Hi Evert!
Why not try to implement my idea given here
http://www.talkchess.com/forum/viewtop ... 97&t=42677. That would lead you to search a much smaller tree hopefully
Good luck!
Kind regards
Pio
Why not try to implement my idea given here
http://www.talkchess.com/forum/viewtop ... 97&t=42677. That would lead you to search a much smaller tree hopefully
Good luck!
Kind regards
Pio
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hgm
- Posts: 27701
- Joined: Fri Mar 10, 2006 10:06 am
- Location: Amsterdam
- Full name: H G Muller
Re: An Evaluation Mystery ?
No way. They are like that against a bare King, which on average attacks 6.6 squares. A Rook covers 14 squares, which is more than 20% of the board in addition. Chances that the Bishop is protected are only ~10%. So there is something like a 30% chance on a hanging Bishop, and a 33% chance on a hanging King, You might not count the latter as part of the total, but that would reduce the total by so much that 45% of it would ow have a hanging Bishop.Evert wrote:Well, positions where a piece outright hangs are about 10%, off the top of my head (I can check to make sure).
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Evert
- Posts: 2929
- Joined: Sat Jan 22, 2011 12:42 am
- Location: NL
Re: An Evaluation Mystery ?
You're right, I mis-remembered the numbers.
The rook hangs in ~15% of the positions (in ~1% of positions it is pinned), and this is what I remembered. The bishop actually hangs in ~65% of won positions and can be won by a skewer in ~18% of positions.
The rook hangs in ~15% of the positions (in ~1% of positions it is pinned), and this is what I remembered. The bishop actually hangs in ~65% of won positions and can be won by a skewer in ~18% of positions.