From: Manabu Terao <Manabu.Terao <at> JAPAN <dot> SUN <dot> COM>
Date: 14 jan 1999
Subject: Shogi strength drill - #11

Dear Shogi Fans,

Here is Problem #11.

Manabu Terao(on behalf of ISPS)



Problem #11

There is good move without escaping the promoted Rook(2c).

G*4b will be followed by Sx4b and you will lose attacking
position.

   9    8    7    6    5    4    3    2    1
+--------------------------------------------+       White in hand:
|    |    |    |    |    |    | wK | wN | wL |  a   +------------------+
+--------------------------------------------+      |                  |
|    |    |    |    |    |    | wG |    |    |  b   |                  |
+--------------------------------------------+      +------------------+
|    |    |    |    |+bP |    | wS |+bR | wP |  c
+--------------------------------------------|
|    |    |    |    |    | wP | wP |    |    |  d
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  e
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  f
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  g
+--------------------------------------------+      Black in hand:
|    |    |    |    |    |    |    |    |    |  h   +------------------+
+--------------------------------------------+      |G                 |
|    |    |    |    |    |    |    |    |    |  i   |                  |
+--------------------------------------------+      +------------------+


Answer #11


   9    8    7    6    5    4    3    2    1
+--------------------------------------------+       White in hand:
|    |    |    |    |    |    | wK | wN | wL |  a   +------------------+
+--------------------------------------------+      |                  |
|    |    |    |    |    |    | wG |    |    |  b   |                  |
+--------------------------------------------+      +------------------+
|    |    |    |    |    |+bP | wS |+bR | wP |  c
+--------------------------------------------|
|    |    |    |    |    | wP | wP |    |    |  d
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  e
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  f
+--------------------------------------------+
|    |    |    |    |    |    |    |    |    |  g
+--------------------------------------------+      Black in hand:
|    |    |    |    |    |    |    |    |    |  h   +------------------+
+--------------------------------------------+      |G                 |
|    |    |    |    |    |    |    |    |    |  i   |                  |
+--------------------------------------------+      +------------------+


The correct answer is +P4c.

Point : A clever move that make the opponent's Gold more diagonally
        and out of a defending position"

An escape of the promoted Rook would be a useless move.
After +P4c, Gx4c will be followed by G*3b, checkmate. If the
opponent takes your Rook(Gx2c), you can check mate by G*3b, too.
You know a Gold cannot move diagonally back. Having known the
answer, you can see it is never a difficult move.
Because you have only one Gold, +P4c is a good move.

If you had two golds, you could check mate in the following
sequence; G*4a,Kx4a,+Rx2a,G*3a,Gx5b.