#110 maximummer and double-mate

[Thomas Maeder]

Problems with restricting conditions such as maximummer and goals such as double-mate aren't correctly solved if the mating side is restricted by the condition.

The reason is that double-mating moves are thought to be illegal when the longest mating moves are generated.

begin
pieces black kb5 rh1h8 bb4 pa6a5c6 white kb2 pb3c5c2d4
stipulation h##1
twin cond whitemaxi
end

The solution

1.Rh8-h2 c2-c4 ##

isn't found in b) but should be.

[Thomas Maeder]

Fixed in the current development head