(19) diagram 19
fa8_dia19


You can count how much. Black has much pieces to attack white 27. But you now know that white can give his outpost backing by 28-23. Therefore plays black as follows.
1...18-22 2.28x17 11x22


22 for black is important for the attack on the white picket at 24. The black disc 22 has two functions.

1. It stops the Lange-vlugel of white. Therefore, white can not reinforce the outpost.

2.It is an obstacle in the way of the center: the sets 33-28.

<44/39/33>
the formation 44/39/33 makes possible exchange of 33-28. In this flankaanval context, it is useful the formation 44/39/33, to keep the position for as long as possible.

<6>
Without black 6, black can indeed not exchange with 22.

3.31-26 14-19 4.40-35 19x30 5.35x24 10-14 6.44-40 14-19 7.40-35 19x30 8.35x24 5-10 9.49-44 10-14 10.45-40 14-19 11.40-35 19x30 12.35x24 9-14 13.37-31

You see why white disc 22 was allowed to stand. If black attacks the outpost immediately 13. 14-19?, white moves 14.32-27. So 13... 3-9 is necessary.

3-9 14.42-37 44-40 is not possible.
[ 14.44-40 22-27 15.31x22 13-19 16.24x4 8-13 17.4x18 12x45 ]
14...7-11 15.44-40 2-7 White must prevent from black 22-27, but white has no good move. 16.26-21 16x27 17.32x21 11-16