Kjell, I believe the before & after checks go by the primary part of the move (Lxa7-a6 is not a…
I have always believed that Popeye prohibits all nul moves, regardless of genre: some people have advocated that nul moves…
The reason the nul-moves-prohibited condition is not mentioned under the diagram is certainly that the common definition of the double…
Why this condition (“nul moves prohibited”) is not mentioned under the diagram? Does the “nul move” have a unique meaning…
A mistake in the text ! It is C+ with Winchloe if you add the condition "nul moves prohibited".
Popeye's apparent "opinion" is irrelevant, since computers can't think in the first place. The rules must be unambiguously given BEFORE…
Cooked: 1. g4 d6 2. Sa3 Kd7 3. Sb1 Kc6 4. Bg2+[bRh1] Kd7 5. Bf1 Rxg1 6. Sa3 Rg3 7.…
Interesting and useful comment by judge Thomas in the award for 2015-16 retros concerning the status of orthodox and non-orthodox…
Oh sorry: you are right, Paul! There really is a dual. Perhaps the composer can use it instead of his…
Thank you Peter! you are right Isardam+anticirce may give very strange things! I tested a) with winchloe and could not…