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What’s the difference between Partial Retrograde Analysis and Retro Strategy?

The history of some chess positions can be determined with certainty and some cannot. PRA looks at each alternative history and finds their different solutions. These typically revolve around if the right to castle exist, then you have some solution; or if last move allows en-passant then another solution exists. RS involves 'mutual dependency', for ...

answered Jun 14 at 17:54

Ywapom

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When capturing en passant, is a position possible such that there is a pin over the square of the taken pawn, rather than the taking pawn?

Just to clarify IA Petr Harasimovic's comment in the answer provided by Cleveland, here is a position in which capturing en passant is illegal due a diagonal pin. [FEN "5k2/2p2b2/8/3P4/8/2K5/8/8 w - - 0 1"] 1. Kc4 c5

rules check en-passant pins

answered Jun 14 at 3:36

Mike Jones

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Tag Info

New answers tagged en-passant

What’s the difference between Partial Retrograde Analysis and Retro Strategy?

When capturing en passant, is a position possible such that there is a pin over the square of the taken pawn, rather than the taking pawn?

Tag Info

New answers tagged en-passant

What’s the difference between Partial Retrograde Analysis and Retro Strategy?

When capturing en passant, is a position possible such that there is a pin over the square of the taken pawn, rather than the taking pawn?

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