From: Manabu Terao <Manabu.Terao <at> JAPAN <dot> SUN <dot> COM>
Date: 7 may 1999
Subject: Shogi strength drill - #26

Dear Shogi Fans,

Here is Problem #26.

Manabu Terao(on behalf of ISPS)


Problem #26

Now White just advance the Pawn to 7e. Don't you have to capture it by
Px7e?

No, you do not have to. There will be a counterattacking tesuji.

   9    8    7    6    5    4    3    2    1
+--------------------------------------------+       White in hand:
| wL | wN |    |    |    |    |    |    |    |  a   +------------------+
+--------------------------------------------+      |                  |
|    | wR |    |    | wG |    |    |    |    |  b   |                  |
+--------------------------------------------+      +------------------+
|    |    |    | wP |    |    |    |    |    |  c
+--------------------------------------------|
| wP |    |    | wS | wP |    |    |    |    |  d
+--------------------------------------------+
|    |    | wP |    |    |    |    |    |    |  e
+--------------------------------------------+
| bP |    | bP | bP | bP |    |    |    |    |  f
+--------------------------------------------+
|    | bP |    | bS |    |    |    |    |    |  g
+--------------------------------------------+      Black in hand:
|    |    | bG |    | bG |    |    |    |    |  h   +------------------+
+--------------------------------------------+      |                  |
| bL | bN | bK |    |    |    |    |    |    |  i   |                  |
+--------------------------------------------+      +------------------+


Problem #26

   9    8    7    6    5    4    3    2    1
+--------------------------------------------+       White in hand:
| wL | wN |    |    |    |    |    |    |    |  a   +------------------+
+--------------------------------------------+      | P                |
|    | wR |    |    | wG |    |    |    |    |  b   |                  |
+--------------------------------------------+      +------------------+
|    |    |    | wP |    |    |    |    |    |  c
+--------------------------------------------|
| wP |    |    |    | wP |    |    |    |    |  d
+--------------------------------------------+
|    |    | bP | wS |    |    |    |    |    |  e
+--------------------------------------------+
| bP |    |    |    | bP |    |    |    |    |  f
+--------------------------------------------+
|    | bP |    | bS |    |    |    |    |    |  g
+--------------------------------------------+      Black in hand:
|    |    | bG |    | bG |    |    |    |    |  h   +------------------+
+--------------------------------------------+      | P                |
| bL | bN | bK |    |    |    |    |    |    |  i   |                  |
+--------------------------------------------+      +------------------+


The answer is : P6e, Sx6e, Px7e

Point : "Tsukichigai" against "Fugoshi Gin"

Responding to White's P7e by Px7e is a novice move since it will allow
White's Silver to advance easily by Sx7e. It will be hard for Black to
defend White's climing-Silver-like attack.

A Silver located one square ahead of a Pawn like S6d in the Problem
diagram is called "Fugoshi Gin". It's rather easy to give a pressure on
"Fugoshi Gin"

Black's P6e against White's P7e is a right move. If White send the
Silver diagonally back, you can gain a Pawn for nothing and the 7th
and 8th files' vanguard pawn will give you a big advantage. If White
captures the Pawn by Sx6e. then capturing the Pawn on 7e will be a
good move aiming at P*6f to kill the White's Silver on 6e. If White
moves P5e from the answer diagram, just taking it by Px5e still
keep you the chance to kill the Silver by P*6f. This is a tesuji called
"Tsukichigai" considering that White's P*6f will be an illegal move since
there is a Pawn on 6c.