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MatPlus.Net Forum Twomovers Most mates by a promoted queen in a #2?
 
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(1) Posted by Rewan Demontay (Real Name: James Malcom) [Monday, Jan 25, 2021 22:59]

Most mates by a promoted queen in a #2?


I know that every piece has had its maximum amount of mates shown, aka Q12, R14, B13, S8, P6, & K6. But what of a promoted queen? The interest lay in that since the key move must be a promotion, the new queen is right away restricted in its range. Discovered checks aren't allowed, namely because Petrovic's #2 does it.

I've managed 8 different mates using zugzwang.

#2
(= 7+9 )

 
(Read Only)pid=20541
(2) Posted by Hauke Reddmann [Tuesday, Jan 26, 2021 11:41]

https://i.kym-cdn.com/entries/icons/facebook/000/004/457/challenge.jpg

For about ten minutes you made me feel old. You are constantly keeping me off finishing my master thesis, y'know :-)

(= 10+8 )


P.S. 9*#, but a 10th unthematic after Qe5. You can insist on
no "additional" mates, in which case this attempt doesn't count.
P.P.S. No finds in the Albrecht up to now.
 
 
(Read Only)pid=20546
(3) Posted by Rewan Demontay (Real Name: James Malcom) [Tuesday, Jan 26, 2021 18:00]

Good job Hauke. I knew you had it in you to overtake mine. :) Your QvQ dual adds extra thematic content.

And extra mates are perfectly fine. As long there are no mating duals by the queen! (Of which you have none.)
 
   
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(4) Posted by Hauke Reddmann [Tuesday, Jan 26, 2021 20:32]

Well, I think you can manage 10 (11 are possible by the matrix) if you study all the tricks of the classic Queen cross (~80 problems in the Albrecht). I'm a bit too lazy now :-) (At the moment the [electronic] annual general meeting of the Hamburg Sport Foundation runs, and surely goes another two boring^W highly fascinating hours, so maybe I multitask a bit :-)

EDIT:
Clearly, a lighter piece can only have 2 mates, if no batteries are allowed. Thus I did also B and S...at the same time (2 solutions :-)
(= 6+1 )


SON OF EDIT:
Anyone with a more economical version?
(= 5+4 )


GRANDSON OF EDIT:
Aw cmon, the following position I composed sleeping ;P
(= 3+2 )

 
   
(Read Only)pid=20551
(5) Posted by Rewan Demontay (Real Name: James Malcom) [Wednesday, Mar 31, 2021 15:42]

For Hauke, here a lighter version in which the 10th unthematic mate is by a queen. ;)

Me After Hauke, #2
(= 8+8 )

 
   
(Read Only)pid=20881
(6) Posted by Hauke Reddmann [Wednesday, Mar 31, 2021 18:26]

With Nc3, +sPa6 instead of Pb4 you get another unthematic Q mate ;-)
 
 
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MatPlus.Net Forum Twomovers Most mates by a promoted queen in a #2?