Problem 186: Valerio Agostini & Antonio Garofalo

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Problem 186: Valerio Agostini & Antonio Garofalo - Fairy

(12.05.2013) Beautiful series H# by Valerio Agostini and Antonio Garofalo from Italy!

186

a) 1.Bxf4 2.Bd6 3.Ke5 4.Kf4 5.Ke3 6.Bf4 Bb6#

b) 1.Bxe4 2.Bc6 3.Kd5 4.Ke4 5.Kd3 6.Be4 Ba6#

Anti-Bristol B-K [Bf4-d6 & Ke5-f4/Be4-c6 & Kd5-e4]

Bristol K-B [Ke5-f4-e3 & Bd6-f4/Kd5-e4-d3 & Bc6-e4]

(Authors)

Version:

186.1

Comments

+2 #1 Nikola Predrag 2013-05-13 13:28

Yes it's nice, unfortunately the twinning spoils the impression a lot. Additional wPb2 would give both solutions without twinning but wBc7 would then be superfluous. A mechanism of reciprocal mate/guard by wB's is thus not good and natural. Here's a scheme for considering:

White Bb8 Bg8 Kb5 Pd5 Pe5 Pg4 Pd2 Pe2
Black Kd7 Bd4 Be4 Pf4
Stipulation ser-H#6

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+3 #2 Antonio Garofalo 2013-05-13 16:00

I don't see any particular improvement in this version. Rather, in the original position the effect echo is more pronounced, while in this version there is too symmetry. However thanks for the suggestion.Quoting Nikola Predrag:

Yes it's nice, unfortunately the twinning spoils the impression a lot. Additional wPb2 would give both solutions without twinning but wBc7 would then be superfluous. A mechanism of reciprocal mate/guard by wB's is thus not good and natural. Here's a scheme for considering:

White Bb8 Bg8 Kb5 Pd5 Pe5 Pg4 Pd2 Pe2
Black Kd7 Bd4 Be4 Pf4
Stipulation ser-H#6

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+3 #3 Nikola Predrag 2013-05-13 19:39

Well, the scheme is for cosidering. What is echo and what is symmetry, that's also for considering as well as what is a fine working mechanism.
Does echo-chameleon play with reciprocal functions make a banal symmetry?
Banal symmetry is when the same piece acts in the same way in symmetrical directions. Even banal symmetry is OK if it enables a most economical mechanism.
I think that an idea should be presented through a most economical and natural mechanism. Chess "naturally" offers many symmetries, avoiding them is unnatural:)

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+2 #4 Diyan Kostadinov 2013-05-13 19:58

Thanks for your comments Nikola. Your version can be seen with diagram and solution here: prntscr.com/14room

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+2 #5 seetharaman 2013-05-15 08:42

I too think that twinning spoils the effect in No.186. Nikolas scheme is a good suggestion for improvement.

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+2 #6 paul 2013-05-18 05:50

IMO the original problem is better. The "bad" twin is a little price to show a nice echo. Nikola's version has no twin but the solutions are symmetrical.

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