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Subject: Re: Test Position, Will Your Program Play Kb1 or the Daring Nxf7!

Author: Anthony Cozzie

Date: 06:10:47 02/17/05

Go up one level in this thread


On February 17, 2005 at 07:36:44, Chris Welty wrote:

>On February 16, 2005 at 13:26:29, Anthony Cozzie wrote:
>
>>On February 16, 2005 at 06:01:57, Chris Welty wrote:
>>
>>>On February 15, 2005 at 20:30:13, Alan McCracken wrote:
>>>
>>>>Again a position taken from one of my games. A game in 15.
>>>>
>>>>[D]r3k2r/1bp1bppp/pp2pn2/4N1B1/q2P4/3B4/PPP1QPPP/2KRR3 w kq - 0 13
>>>>
>>>>Terry
>>>
>>>Altamax goes with Nxf7 (or Bc4 O-O Nxf7 transposing) by 0.50 - PV is
>>>
>>>+1.01 Nxf7 O-O Bc4 Rxf7 Bxe6 Raf8 Bxf6 Bxf6 Bxf7+ Rxf7 Qe8+ Qxe8 Rxe8+ Rf8
>>
>>It looks like you need to fix your material values: Black is left with BB vs RPP
>>and is probably BETTER after your line.
>>
>>anthony
>
>Thanks.
>
>I stuck the position in Altamax and you're right, it trades off the rooks for a
>R+7P vs BB+5Ps. Fine's Basic Chess Endings says "Rook and two pawns always wins
>against two minor pieces" although he seems to have bishop+knight in mind. Are
>two bishops substantially better than bishop+knight in this endgame?
>
>Chris

http://mywebpages.comcast.net/danheisman/Articles/evaluation_of_material_imbalance.htm

Just try plugging that last position into Fritz/Shredder/Crafty/etc.  I know
Zappa after a few minutes gives Black +0.5 in the position you traded into.

17 -48 7536 105823044 1. Re8xf8 Kg8xf8 2. f2-f3 Bf6-g5 3. Kc1-b1 Bb7-d5 4. b2-b3
Bd5-f7 5. Kb1-b2 Kf8-e7 6. Rd1-e1 Ke7-d6 7. a2-a4 Bg5-f6 8. c2-c3 Bf7-g6 9.
b3-b4 Kd6-d5 10. Kb2-b3

Then take a look at Crafty's bad trade code.

anthony



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