White in hand: B 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN wS wG wK * * wN wL |a | * wR * * * * wG * * |b |wP * wP wP wP wP wS wP wP |c | * * * * * * wP * * |d | * wP * * * * * bP * |e | * * bP * * * * * * |f |bP bP bS bP bP bP bP * bP |g | * * bG * * * bS bR * |h |bL bN * * bK bG * bN bL |i +---------------------------+ Black in hand: B Diagram 1. Up to S-3h.After Diagram 1, you'll have to see whether White plays S-6b or S-7b before deciding your next move. If White plays S-6b, his bo-gin (climbing silver) is eliminated, so you can play K-6h. If you do the same at (w) S-7b, White will then play S-8c, thereby taking the due course for the bo-gin. If you are thinking of assuming the hayaguri-gin (rushing Silver) tactic, your move should be P-1f. At White's P-7d, you play P-3f, the first step for the hayaguri-gin. If White plays P-6d instead, you can play S-2g aiming to resort to the bo-gin.
Just as the S-7b positioning has become more popular than S-6b, due to the widely supported tactics such as the Tsukata Special and the Hinieri-bisha (twisting Rook), so is S-7b usually played in Kaku-kawari openings. The reason: White wants to keep the possibility of the bo-gin as long as possible. This is how Black's K-6h has been practically wiped out. In this section we will look into the position after Black's P-1f. As for White's options, there are two types to play: P-9d and K-4b, both of which I am going to explain in detail. It would be impossible, however, for me to cover all the variations here, so I will just refer to a few major ones.
White in hand: B 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * wG * * * wN wL |a | * wR * * * wK wG * * |b |wP * * wP wP wP wS wP wP |c | * * wP wS * * wP * * |d | * wP * * * * * bP * |e | * * bP * * bS bP * bP |f |bP bP bS bP bP bP * * * |g | * * bG * * * * bR * |h |bL bN * * bK bG * bN bL |i +---------------------------+ Black in hand: B Diagram 2. Up to S-6d.Look at Diagram 2, which shows a basic position. First, some examples:
Moves After Diagram 2:
P-3e Px3e, Sx3e --->(Diagram 3)
You aim for an exchange of Silvers, which is similar in principle to the bo-gin, but with the Hayaguri-gin, you have your Pawn on 3f, which needs due consideration. You see, if you play the routine: P-2d, Px2d, Sx2d, you will only send your opponent on his way to euphoria by Sx2d, Rx2d, B*1e! So you have to play P-1f or K-6h to avoid a fork on R&K. Now you see why S-7b and P-1f have become joseki?
To sum it up, you decide where to place your Silver after seeing your opponent's move: a) if it is koshikake-gin(reclining Silver, or S on 5e), you play bo-gin. b) if bo-gin or hayaguri-gin, then you play hayaguri-gin.
White in hand: B P 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * wG * * * wN wL |a | * wR * * * wK wG * * |b |wP * * wP wP wP wS wP wP |c | * * wP wS * * * * * |d | * wP * * * * bS bP * |e | * * bP * * * * * bP |f |bP bP bS bP bP bP * * * |g | * * bG * * * * bR * |h |bL bN * * bK bG * bN bL |i +---------------------------+ Black in hand: B P Diagram 3. Up to Sx3e.At Sx3e, it's White's turn to make a difficult decision.
Further Moves:
P-8f Px8f P*8e
Sequential Pawn dropsÅijoining Pawn tesujiÅjlooks like a promising technique for White. If Black responds with Px8e, Rx8e will make a crossroads Rook threatening Rx4e and Rx8I+.
Further Moves:
4.P-2d Px2d 5.Sx2d Sx2d 6.Rx2d P*2c 7.R-2h Px8f 8.P*8d Rx8d 9.B*6f B*5e 10.P*3c!! --->(Doagram 4)
Please remember that P*8c instead of P*8d will cause a shortage of Pawns later. To Black's P*8d, White could play P8g+, then Rx8d, which will quiet down the position, but if he simply plays Rx8d, the devastating position (Diagram 4) awaits.
White in hand: S P2 9 8 7 6 5 4 3 2 1 +---------------------------+ |wL wN * wG * * * wN wL |a | * * * * * wK wG * * |b |wP * * wP wP wP bP wP wP |c | * wR wP wS * * * * * |d | * * * * wB * * * * |e | * wP bP bB * * * * bP |f |bP * bS bP bP bP * * * |g | * * bG * * * * bR * |h |bL bN * * bK bG * bN bL |i +---------------------------+ Black in hand: S P Diagram 4. Up to P*3c.If White had played R-8b (instead of B*5d) at Black's B*6f, you could have captured a Rook by:
Bx1a+, P-8g+, Gx8g, Rx8g+, L*8h
Back to the moves cited, P*3c is the crucial move. If White responds with Kx3c, you'll only have to play R-3h, which practically marks the end. What if White then plays P*3g? You can play Rx3g, can you not?
This move, P*3c was based on what Naito played in his game against Yonenaga, which was said to be one of the most beautiful Kaku-kawari games ever played. The moves I just presented here were slightly different from those they played, with the Pawns along the far ends a little different, but the idea is from nobody else but Naito.
Pulling White's Silver on 2b from 3c was another possibility which was investigated by many players. In the meantime K-4b became less popular, because the King seems too close to the danger zone. So the mainstream position was that of pushing Pawns on the far ends: P-1f(b) and P-9d(w), with both Kings in the original squares. In that case, please note, there is an effective line of moves on White's part. The Shima-Habu game played in the Zen Nippon Open tournament (Jan. 16, 1991) will give you a clue.