multiple solutions 29/07

[sisi59]

In the multiple solutions of the 29th, i only found two solutions of this grid and these two solutions have 5 common numbers and not only two.
Can somebody explain me my error ?

[gabriele]

In the multiple solutions of the 29th, i only found two solutions of this grid and these two solutions have 5 common numbers and not only two.
Can somebody explain me my error ?

ciao Sisi,
you're right , the common numbers are more then 2

when generating the puzzles I avoid to consider too complicated chains,
so 2 numbers can be placed considering blocking numbers and xwing and xywing

considering also complicated chains the numbers that can be placed are six (at least for my solver)

after the six numbers you can find a BUG (Bivalue Universal Grave) , that can not be applied because the puzzle has multiple solutions (2).

tomorrow I will post the solution with the 6 numbers