[Retros] Mushikui Reconstruction (castling both sides)

[Mu-Tsun Tsai]

Hi everyone,

Today I constructed a sequence that forces both O-O and O-O-O. Here it is:

1.** *** 2.** *** 3.** **** 4.***** ** 5.*** *** 6.** ** 7.**** ***** 8.** 
***** 9.** ***** 10.**** ***** 11.*** *** 12.***** ***** 13.**** ** 14.**** 
** 15.***** ** 16.***** *** 17.***** **** 18.****

This one is insanely hard, so I'll give you the solution below.

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1.e4 Nf6 2.e5 Nh5 3.e6 fxe6 4.Qxh5+ g6 5.Qa5 Bg7 6.d4 c5 7.dxc5 Qxa5+ 8.b4 
Qxb4+ 9.c3 Qxc3+ 10.Nxc3 Bxc3+ 11.Bd2 O-O 12.O-O-O Bxd2+ 13.Rxd2 e5 14.Bc4+ 
d5 15.Bxd5+ e6 16.Bxe6+ Rf7 17.Bxf7+ Kxf7 18.Rd7+


P.S.
The intermediate stage 1.** *** 2.** *** 3.** **** 4.***** ** used in this 
problem was found by Mario Richter. Thanks for his work on this subject.


Mu-Tsun Tsai