Einstein + Parrain bug
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#170 Einstein + Parrain bug
In this reduced position (German notation):
weis Kc2 Lg2 Be5
schw Ka1 Lb2
H#2, circe parrain
Popeye easily finds many solutions: 1. Lb2*e5 Lg2-d5 (+wBb8=D) ...
but if Einstein is added to the condition Popeye finds no solutions.
I think it should find: 1. Lb2*e5=T Lg2-d5=S (+wBb8=D) 2. ... Db8-a7/a8=T#
It seems that Popeye does not allow pawns to promote when they reach the 8th row as the result of Parrain
Bjorn Enemark
Discussion
Anonymous
Rejected; there is no pawn promotion in Einstein Chess.
Cf. http://www.wenigsteiner.de/wjp1999a.pdf
I know the pawns do promote in Einstein, but to me there is difference between pawns ending up on the 8th row as result of the Einstein condition (eg. e7-e8 or Sd6-e8 (B)) and pawns ending up on the 8th row as result of the Circe Parrain condition (eg. 1. TxBh3 (D) Lf1-a6 (S) (+Bc8=D)). The definition of Einstein just describes the first situation.
Bjorn Enemark