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Subject: Re: How Many Amateur programs don't see this simple combination Rxd6! ?

Author: Tom Likens

Date: 07:31:23 09/06/03

Go up one level in this thread


On September 06, 2003 at 02:28:18, Jorge Pichard wrote:

>On September 05, 2003 at 21:27:10, Will Singleton wrote:
>
>>I tried a few progs, all can see it in a couple of seconds.  Looks like the
>>author has something to work on.
>>
>>Will
>
>Tao 5.4 played it instantly check move 23. Rxd6... I was wondering if all the
>other programs rated less than 2400 could see it too.
>
>Pichard

My engine Djinn sees it quickly, (less than a second).  I'm guessing
this is pretty easy for most engines.

 WHITE<1> go

   2  00:00:00   0.36  1. Qh6 Qg8
   3  00:00:00   0.74  1. Qh6 Qg8 2. Kf1
   4  00:00:00   0.64  1. Qh6 Qg8 2. Kf1 Nf5
   5  00:00:00   0.66  1. Qh6 Qg8 2. Kf1 Nf5 3. Qg5
   6  00:00:00   +.++  1. Rxd6!!
   6  00:00:00   1.64  1. Rxd6 Rxd6 2. Qf4+ Ke8 3. Bc6+ Rxc6 4. Rxc6 Ke7
                       5. Bf6+H Kd7 <HT>
   7  00:00:01   2.91  1. Rxd6 Rxd6 2. Rc7+ Ke8 3. Qc3 Rd2+ 4. Qxd2 Rxd2+H
                       5. Kxd2H Kd8H 6. Bxg7 <HT>
   8  00:00:02   2.91  1. Rxd6 Rxd6 2. Rc7+ Ke8 3. Qc3 Rd2+ 4. Qxd2 Rxd2+H
                       5. Kxd2H Kd8H 6. Bxg7 <HT>
   9  00:00:00   +.++  1. Rxd6!!
   9  00:00:06   3.83  1. Rxd6 Rxd6 2. Rc7+ Kg8 3. Qxd6 Rxd6 4. Rc8+ Kf7
                       5. Rxh8 Ra6 6. Bb1
  10  00:00:10   4.00  1. Rxd6 Rxd6 2. Rc7+ Kg8 3. Qf4 Rd2+ 4. Qxd2 Rxd2+H
                       5. Kxd2H Ne8H 6. Bxh8H Nxc7H 7. Be5 <HT>

    time:31.54 nodes:9633059 qnodes:8156895 (84.68%) nps:305423  abf:1.62
    Max depth: 23, Average depth: 12.39

regards,
--tom



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