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Zugzwangs in 5-1 Chess
Posted: Sun Feb 15, 2009 11:42 pm
by guyhaw
I'm rather out of touch with what has been going on here lately ...
Has anyone done a review of zugzwangs in 5-1 chess, or in any of the 5-1 EGTs?
Info in the next five days will be doubly welcome.
Many thanks - Guy
Re: Zugzwangs in 5-1 Chess
Posted: Tue Feb 17, 2009 10:06 am
by h.g.muller
How do you defne a Zugzwag? f the same position has a shorter DTM with the losing side to move than with the winning side to move?
Re: Zugzwangs in 5-1 Chess
Posted: Thu Feb 19, 2009 12:55 pm
by guyhaw
A strong zugzwang (which is what I really meant) is where the theoretical value goes up 0.5 or 1.0 points if one does not have the move.
Where the number of moves goes down but the value stays the same, one has a 'weak zugzwang'.
g
Re: Zugzwangs in 5-1 Chess
Posted: Tue Feb 24, 2009 8:20 am
by h.g.muller
This is what puzzled me: it is already hard to imagine 5-1 positions tht are not a guaranteed 1-0 no matter who has the move. Having the move can hadly be a disadvantage when you can afford to sacrifice anything an still be left with a won end-game. How is the situation for 4-1 end-games. Can't the 5-1 be simply constructed frm those by adding an extra worthless piece (e.g. anoter blocked edge Pawn)?
Re: Zugzwangs in 5-1 Chess
Posted: Thu Feb 26, 2009 11:38 pm
by guyhaw
I sympathise with your point of view hgm. Anyway, MB reports that there are no zugs in 5-1 Pawnless chess. g