Without bBa5, we have a shorter solution: 1.Qg8 2.Sf3 3.g1=S 4.Se1 5.Sg2 Q-d1xd2#
Tested also by Jacobi with this input: cond marscirce stip ser-h#8 forsyth 2rkrq2/2P1PPQ1/6PK/b5P1/7p/7p/3pP1pP/6sb (in less than an hour)
Yes, you're right! The wQd2 can neither mate directly, she too requires the empty home square d1 for the mate…
I hardly dare to maintain my objection, but I still think this is NOT a unique solution! What about the…
Oh my god, how embarrassing! Yes your're absolutely right, it's a unique ser-h#8 then, how could I've lost sight of…
Honestly? A good problem is one that combines illegality (impossibility) of the diagram with disregard of standing principles (rules)? I…
I cannot really understand : economy is not an aim in itself. The authors want to show 4 switchbacks -moreover,…
If my (modest) understanding of series-mover is correct, then economy considerations ("Zeit-Ökonomie") have to be applied? So, what about shorter…
on point 1) : C is for "computer" not for "correct" C+ means computer tested, not more about "legality" or…
ad 1) C+: yes, I agree, this would be the intention of a C+ mark. After much testing I have…