Interesting Tactical Test Position for Dedicated Comps

RadioSmall · Post by **RadioSmall** » Tue Jun 05, 2012 4:48 am

In the following position the move 1.Rxb7! wins .
[fen]r2r3k/1p3p1p/p2p1p2/2nPqN2/2P1P2p/5P1P/P1Q3P1/1R3R1K[/fen]
Solve times for 3 strong Dedicated Computers:
Radio Shack Champion 2250 XL :11 minutes 33 seconds (ply 9)
Fidelity Designer 2265 : 1 hour 30 minutes (ply 8 )
Novag Sapphire : 2 hours 34 minutes (ply 10)

Interesting!!

Larry · Post by **Larry** » Thu Jun 07, 2012 8:58 am

Hi, RS... I meant to get back to you on this one
earlier, but was busy. Here's two:
Mephisto Atlanta Rxb7 68 seconds
Saitek RISC2500 2mb Rxb7 120 seconds (give or take a couple
of seconds..I looked away)
I'll check with the Berlin Pro and the EAG V9 later maybe.
A good position for dedicateds, as you say...
all the best,
Larry

Larry · Post by **Larry** » Thu Jun 07, 2012 12:45 pm

I got another result...
Saitek RISC2500 128kb. 2min 24sec. Depth 03 07

Off to bed...
Larry

Larry · Post by **Larry** » Sat Jun 09, 2012 12:43 am

Here's a surprise result...

Fidelity CC1 Bxb7 12 seconds depth 8....!!

And if you believe that, I'd like to sell you the Statue of Liberty

Here's another real result...

Mephisto Berlin Pro Bxb7 3min15secs or thereabouts depth 5/17

I'm almost out of stronger machines now...

Larry

SirDave · Post by **SirDave** » Sat Jun 09, 2012 2:42 am

The biggest surprise for me is the Novag Sapphire taking 2hrs 34mins. Would have thought it would have taken no more than 1/4-1/2 that.

Post by **Steve B** » Sat Jun 09, 2012 10:41 am

Well the Eag V5 has been at the position now for over 100 minutes
at 8/10 Ply it wants to play Qf7
scoring the position 2.00 in its favor

if it ever stumbles on the winning move ill let you know

Not Holding My Breathe Regards
Steve

Cubeman · Post by **Cubeman** » Sun Jun 10, 2012 9:53 am

Steve B wrote:Well the Eag V5 has been at the position now for over 100 minutes
at 8/10 Ply it wants to play Qf7
scoring the position 2.00 in its favor

if it ever stumbles on the winning move ill let you know

Not Holding My Breathe Regards
Steve

I suppose you mean Qf2

Post by **Steve B** » Sun Jun 10, 2012 1:59 pm

Cubeman wrote:
Steve B wrote:Well the Eag V5 has been at the position now for over 100 minutes
at 8/10 Ply it wants to play Qf7
scoring the position 2.00 in its favor

if it ever stumbles on the winning move ill let you know

Not Holding My Breathe Regards
Steve
I suppose you mean Qf2

Thanks
My Bad
anyway i let the V5 work on the position while i ran a few errands
when i returned it was showing Rxb7 at 10 Ply with 31/2 Hrs on the clock
so ...somewhere between 100 minutes and 210 minutes it stumbled across the right move

Better Late Then Never Regards
Steve

Larry · Post by **Larry** » Sun Jun 10, 2012 2:14 pm

Steve B wrote:

anyway i let the V5 work on the position while i ran a few errands

Saves me the trouble of setting up the position on the V9, since
a V9 is a V5 on high octane, it would find the move perhaps 30%
faster. Still slow versus Atlanta & Co.
I had pretty much the same experience with the Sapphire2. Set it
up and eventually got tired of waiting for it to hit Rxb7. It did
eventually but took too long for me to record the time.
Larry

Cubeman · Post by **Cubeman** » Mon Jun 11, 2012 10:24 am

Larry wrote:
Steve B wrote:

anyway i let the V5 work on the position while i ran a few errands

Saves me the trouble of setting up the position on the V9, since
a V9 is a V5 on high octane, it would find the move perhaps 30%
faster. Still slow versus Atlanta & Co.
I had pretty much the same experience with the Sapphire2. Set it
up and eventually got tired of waiting for it to hit Rxb7. It did
eventually but took too long for me to record the time.
Larry

Mephisto Expert Travel takes about 28 minutes to find Rxb7