Author: Bruce Moreland
Date: 13:30:27 09/16/01
Go up one level in this thread
On September 16, 2001 at 16:15:32, Vincent Diepeveen wrote:
>On September 16, 2001 at 00:36:22, Bruce Moreland wrote:
>
>>Vincent emailed me and asked me to run these. I ran them on a quad 450 Xeon.
>>
>>[D]8/p4bpk/7p/3rq3/3Npp2/PPQ3P1/3R1PKP/8 w - - 0 1
>>
>>I get gxf4 until ply 10, after which there is a switch to b4, which is a bad
>>move. This fails low to -3.88 in ply 11, and gxf4 comes back with a score of
>>-2.48.
>>
>>Later in ply 11, f3 pops up with a score of -2.33.
>>
>>Up to here takes 89 seconds.
>>
>>f3 sticks until ply 14, at which point if fails low to -4.24, and gxf4 comes
>>back with a score of -3.21, resolving after about 1/2 hour.
>>
>>In ply 15, gxf4 fails low again, and the hour ended with no resolution. It was
>><= -3.46.
>>
>>[D]8/p4bpk/7p/3rq3/3Npp2/PPQ2PP1/3R2KP/8 b - - 0 1
>>
>>In this one, I have exf3+, with a score of +2.35 in ply 10. After 16 seconds,
>>in ply 10, it finds Bh5, failing high to +2.80.
>>
>>Ply 11 was uneventful, but in ply 12, Bh5 failed high to +4.24.
>>
>>The score creeps up slightly, and the last score I got in the hour was +4.99,
>>ply 15, after about 45 minutes.
>>
>>I'll run the first one again all night and see what happens.
>>
>>bruce
>
>thanks!
>
>It confirms already what i suspected. f3 is losing
>way harder than alternatives!
>
>I do not understand why ferret needs a ply more to get -4.24 for f3
>than when after f3 is getting played. Possible to shine any light onto
>this?
I don't see that you can draw that conclusion at all, especially in light of
this:
ply milliseconds score line
no 17 27657860 -433 -1221224784 gxf4 Qxf4 Kh1 Rh5 f3 exf3 Nxf3 Rh3 Rf2
Bd5 Rg2 g5 Qd3+ Qe4 Qxe4+ Bxe4 Nd2 Bxg2+
Kxg2 Rd3 Ne4 Rxb3 a4 Rb4 Nc5 Rb2+ Kg3
--
no 17 41753610 -499 666953819 gxf4 Qxf4 f3 Bh5 Kf1 e3 Re2 Rxd4 Rxe3
Rd1+ Re1 Qxf3+ Qxf3 Bxf3 Rxd1 Bxd1 b4 Kg6
Kf2 Bc2 Ke3 Kf5 b5
no 17 50832840 -494 -1178700567 f3 Bh5 g4 e3 Rd1 Bg6 Qc4 e2 Re1 Rxd4 Qxe2
Qxe2+ Rxe2 Rd3 b4 Rxa3 h4 Bd3 Rd2 Rc3 Kh3
Column 4 (node count) is broken and should be ignored.
gxf4 failed low to -4.99 in ply 17, and f3 overtook it at -4.94. So mine would
play f3 after 50,832 seconds.
bruce
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