Saturday, 5 September 2015

American Opposing Rook

American Opposing Rook is one of minor tactics, but I think this is also effective.
The opening is as shown in figure. 1.
The feature of this tactics is P-7e unlike ordinal Opposing Rook.
I like the formation as shown in figure. 2 especially, the Rook turns to 7 line after figure. 1.
Incidentally, it's said the name "American"  derives from the fact the creator of this tactics is from Yokohama city and there are "American wharf" there.
figure. 1

figure. 2

When you use this tactics, you move P-7e in the beginning (figure. 3).

figure. 3

After that, you move Rook to 8 line as in figure. 4 (Opposing Rook).

figure. 4

After figure. 1, you bump Rook as shown in figure. 5.
If you don't move G-7h in figure. 5, the opponent can exchange Rook and put it in 8h (figure. 6). You should take careful this.

figure. 5

figure. 6

If the opponent put P-8e in figure. 5, you can select R-8h or R-7f.
In the case you select R-8h, you can attack by S-7f (figure. 7).
After figure. 7, the opponent will N-9c and you will attack 9-line. 

figure. 7

Some opponent will put P-8d in figure. 5.
 In that case, I like R-7f as Ishida-style (figure. 8)

 After figure. 8, you castle the King and attack like figure. 9.

figure. 9

The sample game is following.
In fact, the end of this game is time-out of the opponent.
I think I'm better in the last position because it's difficult for the opponent to maintain Threatmate without give Bishop or Silver.

* Postsprict

In the last position of above game, if the opponent will put B-3f, which is ingenious move, it may be difficult for me to defence my King (figure. 10). If you find how sente win in this position, please tell me.

figure. 10

* Postsprict again

In figure. 10, S-2d+ is also ingenious move (figure. 11), because I can take Night in 2e and Bishop. So I think sente will win after all.

 figure. 11