Author: Scott Gasch
Date: 00:43:52 10/21/02
Go up one level in this thread
On October 20, 2002 at 22:31:53, Will Singleton wrote:
>In the game Amateur-Thinker (last round of WBEC Qualify A), Amateur had a edge
>in the following position.
>
>4rrk1/pp2q2p/1npp1np1/6QP/8/2N2P2/PPP3P1/2KR1B1R b - - 0 17
>
Hi. Out of curiousity, what is WBEC qualify?
I messed with monsoon until it liked Qe5 here by tuning it's eval. For me, this
was a helpful position in the line after Qe5:
[D}4rr2/pp4k1/2p2np1/3np3/8/2NB1P1R/PPP3P1/2KR4 w - - 2 2
Originally monsoon was unhappy with black's rooks because of poor mobility. But
they control the entire back rank and really have pretty good mobility. So I
changed my rook mobility function to make same-color rooks "invisible" to each
other so they don't interfere with mobility counts.
I did some minor tweaking of the B vs N code here... I think the N on d5 is very
strong, stronger than monsoon gave it credit for.
The last thing I'd like to do here is scale back the "open file" bonus for the
white rook on d1. It's really not an open file with the strong black N at d5...
not to mention the "in the way" bishop at d3. I'm still thinking about how to
do this type of assessment quickly.
Thanks for the position, Will. For the record here's monsoon's line at present.
Still takes to depth 11, but I'm still working on this a bit.
2. -1.39 00:00:03.93 505 PV= Qf7 1. hxg6 Qxg6 [Q] 2. Qxg6+ [Q]
> hxg6 [Q] 3. Rxd6 [Q] <-1.00>
3+ -0.55 00:00:03.95 2462 Nfd5! ++
3. +0.02 00:00:04.01 3813 PV= Nfd5 1. Qxe7 Rxe7 2. hxg6 [Q] hxg6
> [Q] <+0.00>
4u +0.05 00:00:04.07 9567 PV= Qe5 1. Qxe5 Rxe5 2. hxg6 hxg6 [Q]
> <+0.00>
4. +0.05 00:00:04.10 10128 PV= Qe5 1. Qxe5 Rxe5 2. hxg6 hxg6 [Q]
> <+0.00>
5u -0.02 00:00:04.14 17071 PV= Nfd5 1. Qxe7 Rxe7 2. Ne4 Nb4 <+0.00>
5. -0.02 00:00:04.21 22651 PV= Nfd5 1. Qxe7 Rxe7 2. Ne4 Nb4 <+0.00>
6. -0.22 00:00:04.36 43665 PV= Nd5 1. Qxe7 Rxe7 2. Ne4 Re6 3. hxg6
> Rxg6 [Q] <+0.00>
7. -0.66 00:00:04.99 188975 PV= Nfd5 1. Qxe7 Rxe7 2. Nxd5 cxd5 3.
> Bb5 g5 <+0.00>
8. -0.78 00:00:06.56 568908 PV= Nfd5 1. Qxe7 Rxe7 2. Nxd5 Nxd5 3.
> hxg6 hxg6 4. Bc4 <+0.00>
9. -0.75 00:00:10.60 1662588 PV= Nfd5 1. Qxe7 Rxe7 2. Nxd5 Nxd5 3.
> hxg6 hxg6 4. Bc4 Re5 <+0.00>
10. -0.92 00:00:24.22 5200742 PV= Nfd5 1. Qxe7 Rxe7 2. Nxd5 Nxd5 3.
> hxg6 hxg6 4. Bc4 Re5 5. Kb1 <+0.00>
11u -0.60 00:01:37.47 24463753 PV= Qe5 1. Qxe5 dxe5 2. hxg6 hxg6 3.
> Bd3 Kg7 4. Kb1 Nd5 5. Bc4 Rd8 <+0.00>
11. -0.60 00:01:40.36 25245770 PV= Qe5 1. Qxe5 dxe5 2. hxg6 hxg6 3.
> Bd3 Kg7 4. Kb1 Nd5 5. Bc4 Rd8 <+0.00>
12. -0.55 00:03:29.21 53572523 PV= Qe5 1. Qxe5 dxe5 2. hxg6 hxg6 3.
> Bd3 Kg7 4. Rde1 Nd5 5. Nxd5 cxd5
> 6. c3 <+0.00>
Scott
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