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1-Oct-2019

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MatPlus.Net Forum Twomovers Is it a task?
 
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(1) Posted by seetharaman kalyan [Friday, Nov 29, 2019 17:52]; edited by seetharaman kalyan [19-11-29]

Is it a task?


I recollected this old problem of mine showing a partial knightwheel, only six variations. But I cant remember seeing any other example where all the thematic mates cover a king flight also (in this case caused by the departure of the knight). Are 7 or 8 variations possible?

K.Seetharaman, Northwest Chess, 1975
(= 11+12 )

#2
1. Se7! [2. Sf5#]
1. ... Sd6 2. Qd5#
1. ... Sc5 2. S5c6#
1. ... Sg5 2. Qxe3# (Bxe3?)
1. ... Sc3 2. Qb4#
1. ... Sg3 2. Sxf3#
1. ... Sd2 2. c3# (Qc3?)
 
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(2) Posted by Rewan Demontay (Real Name: James Malcom) [Friday, Nov 29, 2019 19:29]

A very neat idea! Congrats on finding 6 variations!
 
 
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(3) Posted by seetharaman kalyan [Friday, Nov 29, 2019 20:43]

Thanks. It went unnoticed !
 
   
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(4) Posted by Michael McDowell [Friday, Nov 29, 2019 23:29]

Comins Mansfield
1st Prize Chess Life and Review 1968-69

(= 12+8 )

Mate in 2

1.Qe6
 
   
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(5) Posted by Hauke Reddmann [Saturday, Nov 30, 2019 14:06]

Oyvey! 1...Sf6 2.Txf6/Sd8 is dualistic, right?
 
   
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(6) Posted by Nikola Predrag [Saturday, Nov 30, 2019 14:21]

Black would be first to capture the opponent's King 1...Sf6 2.Sd8 Sxh5 :-)
 
   
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(7) Posted by Michael McDowell [Saturday, Nov 30, 2019 18:39]

This earlier Mansfield has the flight given by a knight unblock.

Comins Mansfield
Commend, British Chess Magazine 1932-II

(= 11+8 )

Mate in 2

1.Rg4
 
   
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(8) Posted by seetharaman kalyan [Saturday, Nov 30, 2019 21:04]; edited by seetharaman kalyan [19-12-02]

Of the two, Chesslife prize winner is the better one with nice flight giving key and changed mate. The earlier one of course has an additional pinmate. But both suffer from the drawback of at least four variations (5 in the earlier one) being captures of the thematic knight!
 
   
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(9) Posted by Hauke Reddmann [Sunday, Dec 1, 2019 19:01]

@Nikola: Indeed. I should not even bother to comment on a day
where I have to get up at six o'clock in the morning for the
benefit of our chess youth. I knew that Mansfield wouldn't
let such a dual slip :-)
 
   
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(10) Posted by Marjan Kovačević [Monday, Dec 2, 2019 15:55]

Good point made by Seetharaman. We still haven't seen other examples with 6 variations without capturing of thematic S.
 
 
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(11) Posted by seetharaman kalyan [Monday, Dec 2, 2019 18:03]

Daniel Papack sends this excellent #2 by Ellerman, full of battery play and line openings. It has only three captures of the thematic knight but has repeated mate 2.d7 after both Sd4/Sg7.

Arnoldo Ellerman, Schakend Nederland IX/1970, 2.Lob
(= 14+5 )

#2 1.Qh8!
 
 
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