MatPlus.Net

 Website founded by
Milan Velimirović
in 2006

22:50 UTC
ISC 2022
 
  Forum*
 
 
 
 

Username:

Password:

Remember me

 
Forgot your
password?
Click here!
SIGN IN
to create your account if you don't already have one.
CHESS
SOLVING

Tournaments
Rating lists
1-Jul-2022

B P C F





 
 
MatPlus.Net Forum General Construct the longest ser-x with a Black homebase
 
You can only view this page!
Page: [Previous] [Next] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
(421) Posted by Michel Caillaud [Tuesday, Aug 2, 2022 01:38]

On another forum, (396) was used for a discussion about testing long problems, and Paul Raican pointed that it was a ser-h= with colors reversed.
I was confused. When chasing records, a composer can forget elementary principles...
Indeed, in a "true" ser-r, there should be at least one try failing because the side to move has reflex obligation to mate or stalemate. Otherwise, the problem is a ser-h with colors reversed in disguise.
(348),(273) and (396) belong to this category.
As a result, (273) can probably be computer-tested as a ser-h= with Popeye and option Intelligent (and some time...).

It happens that a new ser-r# record can be done using reflex tries :

dedicated to Paul Raican
(= 4+16 )
ser-r#13 C+
1.h4! (1.g6? 2.é×f7‡,g×f7‡) 2.h5 3.h6 4.h×g7 5.g×f8=B 6.g6 7.g×h7 8.h×g8=R! (8.h×g8=Q? 9.é×f7‡,Q×f7‡) 9.Rg2 10.B×é7 11.Bh4 12.Kh2 13.Kh3 Q×h4‡

but it is highly improbable, not to say certainly impossible, that the same can be done for a ser-r=...
 
   
(Read Only)pid=23521
(422) Posted by Arno Tungler [Wednesday, Aug 3, 2022 02:08]

@ “Indeed, in a "true" ser-r, there should be at least one try failing because the side to move has reflex obligation to mate or stalemate. Otherwise, the problem is a ser-h with colors reversed in disguise.”

Please see my earlier post (165) with a few comments from others thereafter.
On the ser-r= see also post (378)!

Congratulations on the “real” Ser-r# above! Now we have a good start to get the longest…
 
   
(Read Only)pid=23522
(423) Posted by Michel Caillaud [Wednesday, Aug 3, 2022 22:43]

Arno, I am afraid that with sooo many posts, I didn't read these ones and concentrated on the ones with records and cooks...
Indeed, you anticipated me (and Paul) on the diagnosis. But sorry there will be no change of dedication A Posteriori.
I knew this beforehand, same as for selfmates that are direct stalemates in disguise, etc. etc.. But somehow I got trapped, and felt guilty...
The defences are lower in the field of records.
Quality is not the priority when you accept Kings in check, adding ugly moves to nice sequences, etc... If a ser-r has no reflex try but more moves, it will be considered the record.
 
   
(Read Only)pid=23525
(424) Posted by Arno Tungler [Thursday, Aug 4, 2022 08:36]

Yes, these standards are often ignored - seems this is not a problem as naturally you want always to find also the “real” length record, even if it is not so nice. For series-reflex stipulations the usual view is that records count only if they have at least one reflex-refutation.
 
 
(Read Only)pid=23528

No more posts
Page: [Previous] [Next] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

MatPlus.Net Forum General Construct the longest ser-x with a Black homebase