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This section needs expansion. You can help by adding to it. (June 2017)
An early ...P-74 (as opposed to an early ...G-52) is the most common move leading to the standard 24-Move Fortress Set (矢倉24手組) position, which is one of the major branching points of the set of Fortress substrategies.
S-37
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
王
角
桂
香
1
飛
銀
金
金
2
歩
歩
銀
歩
歩
3
歩
歩
歩
歩
歩
4
5
歩
歩
歩
歩
6
歩
歩
銀
金
歩
銀
歩
歩
7
金
飛
8
香
桂
角
玉
桂
香
9
☗ pieces in hand: –
Waki System
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
王
桂
香
1
飛
銀
金
金
2
歩
歩
銀
歩
歩
3
歩
歩
角
歩
歩
歩
4
5
歩
歩
歩
歩
6
歩
歩
銀
金
歩
銀
歩
歩
7
金
飛
8
香
桂
角
玉
桂
香
9
☗ pieces in hand: –
13. S-37. The Waki System is a silver-37 branch Fortress substrategy.
13. ...B-64. The Waki System form starts with White moving their bishop to 64 temporarily pinning Black's silver to their rook.
Waki System
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
王
桂
香
1
飛
銀
金
金
2
歩
歩
銀
歩
歩
3
歩
歩
角
歩
歩
歩
4
5
歩
歩
歩
角
歩
6
歩
歩
銀
金
歩
銀
歩
歩
7
金
飛
8
香
桂
玉
桂
香
9
☗ pieces in hand: –
14. B-46. In response, Black opposes White's bishop by moving their own bishop to 46.
This positioning allows the bishops to be traded off in order to place them in hand.