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MatPlus.Net Forum Moremovers Kings&Pawns AUW
 
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(1) Posted by Marjan Kovačević [Monday, Mar 8, 2010 00:50]

Kings&Pawns AUW


Here is a brand new orthodox AUW in the Kings&Pawns category, published today. It seems the first two K&P AUW examples in endgames were published at about same time, at the end of 2009: Costeff (BQ, WS, WB, WR, in a single line) and Dydukh (white AUW in different lines).

Dragoslav Marjanovic
Politika 08.03.2010.
(= 8+2 )

Mate in 4
 
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(2) Posted by Olaf Jenkner [Monday, Mar 8, 2010 01:07]

A very nice problem!
 
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(3) Posted by Siegfried Hornecker [Monday, Mar 8, 2010 01:10]; edited by Siegfried Hornecker [10-03-08]

Gady Costeff pointed out to me the following studies when I asked him about that last year:

(= 8+4 )

H. Ginninger
Ceskoslovensky Sach 1933 (!)
White to move and win

1.b7 f1S! 2.b8B! Kf3 3.Bd6 Ke4 4.c7 Kd5 5.Bh2 Sxh2 6.c8Q wins
or 1...Kh1 2.b8R! f1S 3.Rxb3 wins

(but dual: 5.Bh2 isn't unique)


(= 5+4 )

G. Sonntag
Magyar Sakkélet 1967
White to move and win

1.g7 Ka2 2.g8R! Kb3 3.Kd2 b1S+ 4.Kc1 Sxc3 5.Rb8+ Ka3 6.e3 wins
or 1...Kc2 2.g8B! wins
or 1...Kc1 2.g8Q! wins

Mixed AUW, although Sonntag omitted the 1...Kc1 line for some reason.


I think Costeff is first to show all in a single main line.
 
 
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(4) Posted by Marjan Kovačević [Friday, Nov 12, 2010 01:40]

Dragoslav Marjanović
"Politika", 23.08.2010.
(= 8+3 )

#4

Here is another K&P AUW #4 from the same author. This time there are two pairs of promotions by the same WPs in two variations. There is also a fifth promotion (WQ), and the key is fine for this kind of task.
 
   
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(5) Posted by Marjan Kovačević [Friday, Nov 12, 2010 22:51]

If you are not interested in solving the latest K&P AUW, here is the complete solution:

1.Kf8! Kf6 2.e8B Ke6 3.d8R Kf6 4.Rd6#
1... Kd6 2.d8Q+ Kc5 3.e8S K:c6 4.Qc7#
2... K:c6 3.Qb8 Kd7 4.e8Q# 3... Kc5 4.Qc7#
 
   
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(6) Posted by Siegfried Hornecker [Saturday, Nov 13, 2010 09:33]; edited by Siegfried Hornecker [10-11-13]

Without wanting to spam, I can recommend the book "Kings & Pawns". It contains a few AUWs with that material, although mostly in helpmates.

The following masterpiece is no.380 in the abovementioned book.

(= 7+5 )

Christer Jonsson
Springaren 1993, 4th prize (!)
h#4, 4 solutions (1.1.3... & 1.1.1...)

Sadly the book mostly omits award details.

Solution:
1.Kxe4 e6 2.e1Q e7 3.Qa1 e8Q+ 4.Qe5 Qxe5 mate
1.Kc6 e6 2.e1R e7 3.Rc1 e8R 4.Rc5 Re6 mate
1.Kxe4 e6 2.e1B e7 3.Bf2 e8B 4.Bd4 Bc6 mate
1.Kxe4 e6 2.e1S e7 3.Sc2 e8S 4.Sd4 Sf6 mate
Babson task

To show how difficult a Kings&Pawns AUW is, the following example is a good demonstration.

(= 6+2 )

Edgar Holladay
Illinois Chess Bulletin 1982
Mate in 4, 3 solutions

Even in 1982, three solutions and solution duals were necessary to show this task. The problems we see in this thread should be considered masterpieces.

Solution:
1.d8S+ Kxd6! 2.b8Q+ Ke7 3.Qf4 Ke8 4.Qf7 mate
1.b8B Kxb6 2.d8Q+ Ka6 3.Ba7/Qd7/Qe8 (dual)
1.d8R Kxb6 2.b8Q+ Ka6 3.Qb5+/Qb7+/Qb1/Qb2/Qb3/Kc7/Kd7/d7/Ra7/Re8/Rf8/Rg8/Rh8 (dual)
 
 
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MatPlus.Net Forum Moremovers Kings&Pawns AUW