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MatPlus.Net Forum General Minimal Material To Correctly Show A Theme In The #2
 
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(1) Posted by James Malcom [Wednesday, Jul 6, 2022 21:28]

Minimal Material To Correctly Show A Theme In The #2


As per the title, here are a few examples.

#2
(= 4+1 )


#2
(= 4+2 )


#2
(= 5+1 )


What other themes have known minimal showings in the twomover?
 
(Read Only)pid=23441
(2) Posted by Joost de Heer [Wednesday, Jul 6, 2022 22:17]

(= 2+1 )

#2
Or am I misinterpreting your question?
 
 
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(3) Posted by Hauke Reddmann [Wednesday, Jul 6, 2022 22:24]

Speckmanns 3+4 piecer book, theme register?! :-)
(Sorry, it's 22:22 and I'm straightly heading for bed.
No idea if it has a theme register at all...)
 
   
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(4) Posted by Hauke Reddmann [Wednesday, Jul 6, 2022 23:08]

It's 23:00 (thank you very much, Malcom :-) and yes, "Kleinste Schachaufgaben"
DOES have a theme register. Not much 2# content though (did you know you
can do a Roman with 4 pieces?).

But that costed me ten seconds. A whopping 30 minutes (gasp!) went
into a starflight (even with 4 different mates) with 5 pieces:
(= 4+1 )

No hits on Albrecht or YACPDB.
EDIT: Improved, no taking of unthematic flights.
(= 4+1 )

SON OF EDIT: But there is a ton of 5 piece star flights on YACPDB. I still search
for the "perfect" rendering (no checking key, no promotion key, no duals, no fifth flight,
four different mates).
 
   
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(5) Posted by seetharaman kalyan [Thursday, Jul 7, 2022 01:51]

@Joost. That was the obvious one. A knight promotion one will take lot more black men, but can be W-minimal.
 
   
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(6) Posted by Hauke Reddmann [Thursday, Jul 7, 2022 08:59]

A lot? Hardly, 2+4 suffice :-) (Hint: YACPDB 327793, only without the joke)
B promotion: 3+2, didn't try minimal yet. (Edit: 2+16 without promoted
blacks, 21133 Albrecht, I now remember I saw it before)
 
 
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(7) Posted by Joost de Heer [Thursday, Jul 7, 2022 11:15]

Knight promotion can be done with 3+1 (by several authors in some form or another).
(= 3+1 )

#2

And as minimal you don't need that much material either.
(= 2+5 )

#2
[EDIT: See later in the thread, this can be done much more economical 2+3]

Bishop is also easy with 3+1 (also by several authors in some form or another, usually in some form of twin with the knight promotion)
(= 3+1 )

#2

Bishop minimal on the other hand is much harder, the Bo Lindgren composition that Hauke mentioned is actually the only minimal I could find.
(= 2+16 )

#2 (Bo Lindgren, Deutsche Schachzeitung 1977)
http://www.schach-udo.de/albrecht/albrecht2/?rec=21133
 
   
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(8) Posted by seetharaman kalyan [Thursday, Jul 7, 2022 12:46]

Oh.. miniature!
 
 
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(9) Posted by seetharaman kalyan [Thursday, Jul 7, 2022 13:24]

Here is one original!

(= 2+7 )


#2 (b) Move g6 -> g5
 
   
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(10) Posted by Nikola Predrag [Thursday, Jul 7, 2022 14:08]

Could be Zugzwang 3+2
#2 W: Kf8,Pd7,Pg6; B:Kh8,Sh6; Twin: Sh6-g8
 
   
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(11) Posted by Sarah Hornecker [Thursday, Jul 7, 2022 20:19]

What is the issue with 2+3?

(= 2+3 )

Mate in 2

I think this was used many times in endgame studies (not in this exact setting, obviously).
Now in this setting I don't find a twin, but it should be possible to make a similar one with a twin, I think.
 
 
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(12) Posted by seetharaman kalyan [Friday, Jul 8, 2022 06:56]

@Nikola, that is a nice one!
If a twin were possible in 2+3 setting that would be great too!
 
   
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(13) Posted by Hauke Reddmann [Friday, Jul 8, 2022 11:23]

@Joost: It's "rec", not "id". Example (we missed the Q :-)
http://www.schach-udo.de/albrecht/albrecht2/?rec=268473
 
   
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(14) Posted by Hauke Reddmann [Friday, Jul 8, 2022 20:49]

Freeze! Rock! White Lines blow away!
https://www.yacpdb.org/#493079
https://www.yacpdb.org/#12178
Miniatures for Themes A and B
 
 
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(15) Posted by seetharaman kalyan [Monday, Jul 11, 2022 00:45]

@Nikola Predrag
To compare to your version no.10 ShankarRam quotes his Madrasi #2. It has a similar setting but shows the Vladimirov theme in the tries and after one of the solutions!

Feenschach, 1983
(= 3+2 )

#2vvv Madrasi. Two solutions
 
   
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(16) Posted by Hauke Reddmann [Monday, Jul 11, 2022 09:45]

Letter noodle salad!

Obvious Banny is obvious.
Simple (4 pieces): https://www.yacpdb.org/#141546
Cyclic (7 pieces): http://www.schach-udo.de/albrecht/albrecht2/?rec=13339

Hannelius too.
Simple (5 pieces): https://www.yacpdb.org/#487732
Cyclic (7 pieces): https://www.yacpdb.org/#448500
(With thematic dual mates; can't find the SCHWALBE miniature without.)

I always confuse Dombrowskis and Dombrowskis paradox, have both :-) (5 pieces)
https://www.yacpdb.org/#516969
Dombrowskis+Rudenko+Shedey (5 pieces)
https://www.yacpdb.org/#374293
 
   
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(17) Posted by Valery Gurov [Monday, Jul 11, 2022 09:47]

Vladimirov? May be Banny!?
 
   
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(18) Posted by seetharaman kalyan [Monday, Jul 11, 2022 11:08]

Yes Banny! Thanks for pointing out Me Gurov
 
   
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(19) Posted by Hauke Reddmann [Monday, Jul 11, 2022 20:15]

Vladimirov can be done with 5 pieces either.
Extremely simple example: https://www.yacpdb.org/#146465

Reciprocal mate change with 6 pieces: https://www.yacpdb.org/#139357

A whopping 14 but extremely light for cyclic change: https://www.yacpdb.org/#31584
 
   
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(20) Posted by Joost de Heer [Monday, Jul 11, 2022 21:36]

Miniature lettersoup:

Anatoly Sarkic, Karpati Izag Szo 1969
(= 6+1 )

#2 a) Sg4->c1 b) Rd6-d8 c)=b) Ka1->a7

a) 1. Bd3 Kc5(a)/Kc3(b) 2. Qa3(A)/Qa5(B)
b) 1. Se5 Kc5(a)/Kc3(b) 2. Qa5(B)/Qc4(C)
c) 1. Se3 Kc5(a)/Kc3(b) 2. Qc4(C)/Qa3(A)
 
   
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MatPlus.Net Forum General Minimal Material To Correctly Show A Theme In The #2