Actually the first two solutions were composed first, showing change of function of White rook and bishop !
I agree. Only reason could be that the author wanted the key also to open & close lines!
Another "silent feature" of this is the fact that both thematic mates close the 5th rank so that after1...Rd5 the…
Well done Bernd! Indeed with a so tricky move order, it would have been very risky to publish this PG…
You are right Joost. I would prefer the original version, but unfortunately anticipated.
In the new version, b brings absolutely nothing new, as it's the original position mirrored through the a8-h1 diagonal.
Meanwhile, the 0.2.2 version was launched. It has now Chess960 condition. For example, Tacu's enigma 17222 (Die Schwalbe 287/2017) is…
White and black have made the same moves but in different order. Obviously the position is mirrored !!
Of course, as this is a retro problem... An amount of retro problems are 100/100 correct because the reasoning is…
Yes Julia, that's what I say. C- or C? could mean "not tested" or perhaps that a computer didn't find…