Български (България)English (United Kingdom)
Problem 334.1.Mikitovics & Balasubramanian & Crisan - Fairy (Swapping Kings, Locust)

mikitovicsbalasubramaniancrisan(18.02.2014) Here you can see the improved version of problem n.334 with new co-author: Vlaicu Crisan.



3341

a) 1...Bc3 2.Sc5(Ke6⇔Kc2) Lxc5-b6(Kc2⇔Ke6) 3.Lxc3-b2 Rd5    

4.Kc3 Ke5 5.Lxd5-d4(Ke5⇔Kc3) Lxd4-e3(Kc3⇔Ke5)#

b) 1...Rd3 2.Sf4(Ke6⇔Kc2) Lxf4-g4(Kc2⇔Ke6) 3.Lxd3-d2 Be5    

4.Kd3 Kd5 5.Lxe5-d4(Kd5⇔Kd3) Lxd4-c4(Kd3⇔Kd5)#

Exchange of functions between two pairs of pieces

(between bBa1 & bRd1 and between wLd8 & wLh8).

Active sacrifices by bB, bR & wS.

Good use of fairy condition with bK & wK swapping 4 times in each phase.

Line clearance by bLd4 for bB/bR.

ODT.

(Authors)

    Swapping Kings: When the side on-move checks the opposite King, the Kings change places. This is known as the “swap”. A swap is mandatory. The legality of any checking move is evaluated after the swap, except in certain cases involving castling. Castling out-of–check is illegal (wKe1 wRh1 bKe8 bBa5, 1.0-0??). Castling through check is illegal (wKe1 wRh1 bKf8 bBa5, 1.0-0??). Castling into-check is legal (WKe1 WRh1 BKf8 BBa7, 1.0-0!) A King swapped back to its game-array square is considered “reborn” and is eligible to castle.

    Locust: a piece which moves only to capture. It lands on the same squares as a grasshopper, but the arrival square must be empty, because the locust captures its hurdle.
 

Comments  

 
0 #1 Diyan Kostadinov 2014-02-17 22:14
By the way - this is the most recent photo of Balasubramanian, taken some days ago. Thank you Bala!
Quote
 
 
0 #2 S. K. Balasubramania 2014-02-18 02:36
Dear Diyan,

Thanks for mentioning about my photo.

In the solutions printed, it would have been better if the swapping of kins are printed as Ke6Kc2, etc. instead of Ke6Kc2, etc. can you kindly make these corrections.

---Bala
Quote
 
 
0 #3 Diyan Kostadinov 2014-02-18 09:01
It looks like some signs can not be displayed on the site... Now I put "=" between both Kings when swapping.
Quote
 
 
0 #4 seetharaman 2014-02-18 17:24
How about this sign:
Quote
 
 
0 #5 Diyan Kostadinov 2014-02-18 19:54
Dear Ram and Bala, as you see even in your comments the suggested signs do not appear. Thats why I used "=". But I think it's OK and the solution is understandable enough.
Quote
 
 
0 #6 Nikola Predrag 2014-02-18 22:00
The complexity of the idea and of the elements of its beautiful realization is described without mentioning the most important point of the composition. In the end, the existence of white Royal battery forbids wK to leave the battery line, due to the Swapping condition.
The crucial thematic feature is creation of these Royal batteries, which means prepared sacrifices on c3/d3 and line clearance by bLd4 for the critical moves 3.Lxc3-b2 and 3.Lxd3-d2. After interferences by wK on c3/d3, bK can come to e5/d5. So far, the critical manoeuvre looks "simple" but in the end there are potential flight-squares for wK, away from the Royal-battery line. By playing to these squares White would complete an Indian manoeuvre.
Now, Indian means critical move, temporary lineclosing and finally lineopening. Final lineopening here does not occur in the real play but it is clearly present as the most thematic forbidden element. So, it might be called a "virtual Indian"
Quote
 
 
0 #7 S. K. Balasubramania 2014-02-19 02:07
Dear Diyan,
Kindly refer to our original Problem 334 in which you have used proper symbol in the solution. How is that it is not possible now?
--- Bala
Quote
 
 
0 #8 Diyan Kostadinov 2014-02-19 09:22
Dear Bala, I dont know why the symbols on the text of 334 appear, but not appear on 344.1...
But nevertheless - now I found the html code for different symbols, so now I put the correct one in the solution (on my computers its OK, so it should be fine to all too). I thank Adrian who sent me information about that!
Quote
 
 
0 #9 S. K. Balasubramania 2014-02-19 14:38
Dear Diyan,
It is fine now.
Thanks for your effort.
--- Bala
Quote
 
 
0 #10 Vlaicu Crisan 2014-02-22 10:47
Dear Nikola,
First of all, we all have to thank you a lot for the critical comments on 334! Your suggestions and active researches actually triggered the need to improve the initial idea. Your contribution was very important and helped a lot in shaping the final form.

I must also partially agree with your previous assessment. Yes, the wK interceptions after wLO performs a critical move allow bK to play on these lines - all these clearly show the pattern of Indian theme. However, since the royal battery is not fired, we may consider it a virtual example of the theme. The whole idea works because Black is in zugzwang in the critical position and has no choice but capture the wLd4. The critical position, with bK prisoner between the two wLs forming a mutual battery, is another key feature of the composition - a feature which I particularly enjoyed a lot.
Quote
 
 
0 #11 Nikola Predrag 2014-02-22 15:43
Dear Vlaicu, Bala and Janos, I enjoy analysing the (more or less) hidden details and potential aspects of interesting ideas and it's the greatest pleasure to see how your joint talents have achieved such a masterpiece in the end.

bK imprisoned between two wLO's is a well known feature where each LO is both a front piece of one and a rear piece of the other battery at the same time. (Batteries where wLO's on d4 appear as a rear piece are never fired, but they prevent captures of the front pieces 5...Kxb2/Kxd2.)

However, the creation of batteries with wLO's on d4 as FRONT pieces is very interesting and there are also Indian manoeuvres (D/O) with the same critical square d4, featuring Grimshaw.
Initially, I wrote this for the comment #6 but I deleted it as perhaps too complicated (requiring long explanation).
Anyway, the complexity and all aspects of the economy (including the reciprocities) of the mechanism are tremendous.
Quote
 
 
0 #12 S. K. Balasubramania 2014-02-24 17:48
Dear Nikola,
Your analysis is very deep and interesting, especially the way in which you have explained the batteries formed by font/rear LOs with bK imprisoned in between. Both the LOs can act as front as well as rear pieces. Another interesting this as Vlaicu pointed out is the zug-zwang position after the penultimate move. Not only that the bK can't capture the front & rear line battery LOs, the imprisoned bK can't move to any of its adjacent squares as both the LOs take care of them. The critical square d4 has lot many things. It gets vacated initially for bR/bB and then is occupied by white LOs to be finally captured.

Thanks for your deep analysis and comments.
Quote
 
 
0 #13 Nikola Predrag 2014-02-25 04:56
Dear Bala, this problem is actually too interesting. Zugzwang is obvious and if Black would have any tempo-move, the mating move would not be forced. So the Zugzwang seems highly relevant feature.
If it is so relevant, then the interferences on d4 are also relevant, because without them, bKc3/d3 would be in check just before the mating move and that would not be Zugzwang. So, 3.LOxc3-b2/LOxd3-d2 are critical moves and 5.LOxd5-d4/LOxe5-d4 close the lines. That would be critical Grimshaw. The line-openings in the end by capturing moves of bLO are relevant, since wLOs b2/d2 would check bK e5/d5 and cause the swapping if wK tries to vacate the respective line. That all would be Indian. All those features seem relevant for the solution.
Quote
 
 
0 #14 Nikola Predrag 2014-02-25 04:57
However, wLOs play to d4 not only to force, but in the first place to enable the mating moves by bLO. What if the interferences on d4 are not relevant, but only some accidental effects? Then Zugzwang would also be an irrelevant accidental effect. I'm not sure what to say.
The example (s#1) shows the essentially same mate without Zugzwang.
W:Lb5,Kc3,Lb2,Pf2; B:Ke5, Pf5,Lg5; s#1
1.f2-f4[Ke5Kc3]+ Lg5*f4-e3[Kc3Ke5]#
Anyway, if there's Zugzwang, there are also Grimshaw and Indian.
Quote
 

Add comment


Security code
Refresh

  P1110623

KOBULCHESS.COM

site for chess composition

 General editor:

Diyan Kostadinov

Co-editor:

Seetharaman Kalyan

Recent comments