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Carlos Cetina wrote on Thu, Oct 19, 2023 01:30 PM UTC:

@HG:

It seems that there is a bug in the Coherent Chess preset (which was edited using the Play-test applet), since upon reaching the position shown in the following diagram the software declares checkmate after 11... Sh7+, it being evident that White can block the check with either 12.Bh5, 12.Qh6, 12.Qg3 or 12.Qf2.

This critical position can be accessed by following these movements:

1.Gfg3    Ggg7
2.Gdc3   Qh7
3.G2h3   Qxe4
4.Gf3      Qg6
5.Gi4      Qxg1
6.Qxg1   Sc7
7.Ge4      Sxi4
8.G2d3   Bh4
9.Bc5       Bxf2+
10.Qxf2   Gfe7
11.Qe3     Sh7+

Could you please take a look at this? Thanks in advance!


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