Zugzwangs in 5-1 Chess

Endgame analysis using tablebases, EGTB generation, exchange, sharing, discussions, etc..

Zugzwangs in 5-1 Chess

Postby guyhaw » Sun Feb 15, 2009 11:42 pm

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
guyhaw
 
Posts: 489
Joined: Sat Jan 21, 2006 10:43 am
Location: Reading, UK

Re: Zugzwangs in 5-1 Chess

Postby h.g.muller » Tue Feb 17, 2009 10:06 am

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?
h.g.muller
 
Posts: 216
Joined: Mon Feb 19, 2007 8:24 am
Location: Amsterdam

Re: Zugzwangs in 5-1 Chess

Postby guyhaw » Thu Feb 19, 2009 12:55 pm

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
guyhaw
 
Posts: 489
Joined: Sat Jan 21, 2006 10:43 am
Location: Reading, UK

Re: Zugzwangs in 5-1 Chess

Postby h.g.muller » Tue Feb 24, 2009 8:20 am

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)?
h.g.muller
 
Posts: 216
Joined: Mon Feb 19, 2007 8:24 am
Location: Amsterdam

Re: Zugzwangs in 5-1 Chess

Postby guyhaw » Thu Feb 26, 2009 11:38 pm

I sympathise with your point of view hgm. Anyway, MB reports that there are no zugs in 5-1 Pawnless chess. g
guyhaw
 
Posts: 489
Joined: Sat Jan 21, 2006 10:43 am
Location: Reading, UK


Return to Endgame Tablebases

Who is online

Users browsing this forum: No registered users and 2 guests

cron