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Problem 821: S.K.Balasubramanian - Helpmate
balasubramanian(04.04.2017) White cycle and selfblocks on same square is what Bala, our Indian expert wants to show.
 
 
 
 
 
 
 
 
 
 
 
821. S.K.Balasubramanian (India)
821
H#2           (b) d5->d6        (5+8)
(c) d5->e6
 
 (a) 1.Ke4 Sc4 (A) 2.Rd4 Rxe3# (B) 
 (b) 1.Kd5 Rxe3 (B) 2.Qd4 Bb7# (C)
 (c) 1.Ke5 Bb7 (C) 2.Bd4 Sc4# (A)
  

White cycle with selfblock on the same square by three different black pieces (Author)

 

Comments  

 
+2 #1 Vitaly Medintsev 2017-04-04 07:03
Wrong condition. There must be twin form: b) Pd5->d6, c) Pd5->e6
Also, amount of units must be (5+8)
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+2 #2 Vitaly Medintsev 2017-04-04 07:21
Pin of WR could be eliminated in the following position: 3B4/1b5q/4p3/K6p/2P1k3/6RP/2N5/3nr3
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+1 #3 Seetharaman Kalyan 2017-04-04 07:40
Quoting Vitaly Medintsev:
Wrong condition. There must be twin form: b) Pd5->d6, c) Pd5->e6
Also, amount of units must be (5+8)

Thanks Vitaly for pointing out the errors quickly. It was my mistake. Since corrected.
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0 #4 Yuri BILOKIN 2017-04-04 10:46
Можно экономичнее
1B6/5q2/3n2n1/2p4K/P1k5/4R3/N7/2r5

H#2 b) Sd6?e5 c) c5?c6 5+6
Quote
 
 
0 #5 Yuri BILOKIN 2017-04-04 10:48
Можно экономичнее
1B6/5q2/3n2n1/2p4K/P1k5/4R3/N7/2r5

H#2 b) Sd6-e5 c) c5-c6 5+6




















Quoting Yuri BILOKIN:
Можно экономичнее
1B6/5q2/3n2n1/2p4K/P1k5/4R3/N7/2r5

H#2 b) Sd6?e5 c) c5?c6 5+6
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+1 #7 S K Balasubramanian 2017-04-05 04:22
Thanks Vitaly for your suggested version and also for quoting few more examples on the same idea.
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+1 #8 Manikumar S 2017-04-09 10:58
Quoting Vitaly Medintsev:
Pin of WR could be eliminated in the following position: 3B4/1b5q/4p3/K6p/2P1k3/6RP/2N5/3nr3


An economical version of the same. 2B5/8/7q/8/K3p3/2P1k3/5bRP/2N1r3
6+5
H#2
a) Diagram
b) Move e4 to e5
c) Move e4 to f5

a) 1.Kf3 Sd3 2.Re3 Rxf2#
b) 1.Ke4 Rxf2 2.Qe3 Bb7#
c) 1.Kf4 Bb7 2.Be3 Sd3#
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+3 #9 Vitaly Medintsev 2017-04-09 16:03
Quote:
An economical version of the same. 2B5/8/7q/8/K3p3/2P1k3/5bRP/2N1r3

In suggested version, capture of thematic unit (black bishop) should be avoided because this capture is a flaw.
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+2 #10 Manikumar S 2017-04-09 18:54
Thank you sir. Am learning a lot thru these. What about replacing black knight d1 with black pawn d4? If I got you right, hope this Sxd4 should not be a flaw.
3B4/1b5q/8/K3p2p/2Ppk3/6RP/2N5/4r3

Quoting Vitaly Medintsev:
Pin of WR could be eliminated in the following position: 3B4/1b5q/4p3/K6p/2P1k3/6RP/2N5/3nr3
Quote
 
 
+2 #11 Vitaly Medintsev 2017-04-09 19:37
Quote:
What about replacing black knight d1 with black pawn d4? If I got you right, hope this Sxd4 should not be a flaw.

True, Sxd4 should not be a flaw but, in this case, there will be another flaw - idle WS in solution ending with Bc7#.
Black knight d1 could be replaced with black pawn f3. Rxf3# is not a big flaw but it could be considered as small shortcoming :-)
So, I would prefer the play without any accidental capturing. In addition, mirrored BK position looks beter, in my view - a matter of personal taste, of course.
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+2 #12 Manikumar S 2017-04-12 05:35
Thank you sir for your time and explanation. Its totally convincing. Also just learnt what a mirrored king is.
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+1 #13 Vitaly Medintsev 2017-04-12 06:38
Quote:
Also just learnt what a mirrored king is.

I'm not sure about the term. I meant there are no pieces around BK on adjacent squares in initial position.
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0 #14 Seetharaman Kalyan 2017-04-17 19:22
Quoting Vitaly Medintsev:
I'm not sure about the term. I meant there are no pieces around BK on adjacent squares in initial position.

You are right. Such a position is called Mirrored King.
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