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Chu Shogi. (Updated!) Historic Japanese favorite, featuring a multi-capturing Lion. (12x12, Cells: 144) (Recognized!)[All Comments] [Add Comment or Rating]
📝H. G. Muller wrote on Mon, Jun 24 05:27 PM UTC in reply to A. M. DeWitt from 02:19 PM:

I did not fully discuss the problem because the solution given for B23 was essentially correct. I only mention it because it failed to point out the essential need for deferring promotion to Lion, and I did not think the discussion in the MSM did that fact justice.

At that time the MSM was my only source for these problems, and it is a copyrighted source (which also contains the FENs). Many of these problems are presented on the website of teh chushogi-renmei, though. The numbers of the B series seem to correspond with the numbers in parentheses of set 1 there.

I took a look at my file with FENs, counting lines. Can this be the one for B23:

4+A1gk2f1/6s2+P1l/1+H1n4r1e1/5N3mp1/5xpO4/11+L/9Q2/12/3+v8/12/12/12 w - 0 1

?

[Edit] Indeed it is. HaChu cannot solve it, though, as it does not consider Kirin deferral. You have to first play the Kirin move; then it finds mated in 8 within a second.