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Subject: Re: King safety test position

Author: Slater Wold

Date: 16:27:32 03/15/02

Go up one level in this thread


On March 15, 2002 at 17:59:26, Kim Roper Jensen wrote:

>Hi
>
>Just wanted to share a position from a game I played some years ago.
>
>It's a position where its hard to see which side, have the best protected king.
>
>[D] 2r1k1nr/4ppbp/3p2p1/p3P3/bp1B1PP1/7P/qPPQ2B1/1NKR3R w - - 0 1
>
>How long does it take to see that white have the better position ??
>
>Best move here is 1.exd6!


White(1): st 180
search time set to 180.00.
White(1): setboard 2r1k1nr/4ppbp/3p2p1/p3P3/bp1B1PP1/7P/qPPQ2B1/1NKR3R w - - 0 1

       +---+---+---+---+---+---+---+---+
    8  |   |   | *R|   | *K|   | *N| *R|
       +---+---+---+---+---+---+---+---+
    7  |   |   |   |   | *P| *P| *B| *P|
       +---+---+---+---+---+---+---+---+
    6  |   |   |   | *P|   |   | *P|   |
       +---+---+---+---+---+---+---+---+
    5  | *P|   |   |   | P |   |   |   |
       +---+---+---+---+---+---+---+---+
    4  | *B| *P|   | B |   | P | P |   |
       +---+---+---+---+---+---+---+---+
    3  |   |   |   |   |   |   |   | P |
       +---+---+---+---+---+---+---+---+
    2  | *Q| P | P | Q |   |   | B |   |
       +---+---+---+---+---+---+---+---+
    1  |   | N | K | R |   |   |   | R |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White(1): go
              clearing hash tables
              time surplus   0.00  time limit 3:00 (3:00)
         nss  depth   time  score   variation (1)
starting thread 1
                6     0.17  -1.69   1. exd6 Bxd4 2. d7+ Kxd7 3. Qxd4+ Ke8
                                    4. Be4 Nf6
                6->   0.20  -1.69   1. exd6 Bxd4 2. d7+ Kxd7 3. Qxd4+ Ke8
                                    4. Be4 Nf6
                7     0.40  -1.38   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. Bd5 Qa4 5. Rh2
                7->   0.56  -1.38   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. Bd5 Qa4 5. Rh2
                8     1.62  -1.66   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. g5 Ba4 5. Be4 Rc4 <HT>
                8->   2.15  -1.66   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. g5 Ba4 5. Be4 Rc4 <HT>
                9     4.68  -1.66   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. g5 Ba4 5. Be4 Rc4 <HT>
                9->   6.82  -1.66   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. g5 Ba4 5. Be4 Rc4 <HT>
               10    18.98     ++   1. exd6!!
               10->  49.07  -1.27   1. exd6 Bxd4 2. d7+ Bxd7 3. Qxd4 Nf6
                                    4. g5 Ba4 5. Be4 Rc4 6. Qd8# <HT>
               11     2:01     ++   1. exd6!!
              time=3:00  cpu=208%  mat=-1  n=245840938  fh=93%  nps=1364k
              ext-> chk=17801393 cap=870361 pp=502965 1rep=1877028 mate=95160
sing=16
              predicted=0  nodes=245840938  evals=41818275
              endgame tablebase-> probes done=0  successful=0
              hashing-> trans/ref=22%  pawn=1%  used=99%
              SMP->  split=1184  stop=244  data=7/32  cpu=6:14  elap=3:00

White(1): exd6
Black(1): quit
execution complete.


From my (very unstable) Crafty.  As you can see, it's using singular extensions.



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