Popeye (chess)

There seems to be something wrong with neutral bishops in Ghost chess:

Christian POISSON
Vlaicu CRISAN
Quartz 2001
White : Kd1
Black : Kb6 Ra5 Pb5a4
Neutral : Pc7d7

h‡2,5 (1+4+2) C+
2.1.1...
Fantômes

1…d8=Fn 2.Ta6 ç×d8=Cn(»Fnd8) 3.Ra5 Cnç6[Fnd8]‡
1…ç8=Dn 2.Ta7 d×ç8=Tn(»Dnç8) 3.Rb7 Tnb8[Dnç8]‡

The bishop solution isn't found by Popeye 4.51. When the white king is
moved to e1, a second solution (1...d8=Qn and further like the bishop
solution) is found. When searching for a h#3.5, the bishop solution is
found:
1...nPd7-d8=nB 2.Ra5-a7 nPc7*d8=nS 3.Kb6-a5 Kd1-e2 4.Ra7-a6
nSd8-c6[+nuBd8] #