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|(21) Posted by Joose Norri [Wednesday, Jul 10, 2019 09:52]; edited by Joose Norri [19-07-10]|
Krabbé's article De Rups is in Schaakbulletin 183, februari 1983, with 19 examples. Let me see if I manage to operate the scanner.
|(22) Posted by Jan Hein Verduin [Wednesday, Jul 10, 2019 19:39]|
I knew it!
|(23) Posted by Joose Norri [Thursday, Jul 11, 2019 21:30]|
Krabbé does not have a mutual Rups, but there is Korolkov's yacpdb 275818.
|(24) Posted by Rewan Demontay [Friday, Jul 12, 2019 01:59]|
Even if Krabbe has no mutual caterpillars, it would still be nice to see that article.
And thanks for that double caterpillar pro life by Korolkov Joosr! I was looking for such a problem as well!
A long caterpillar problem that I know is a n#24 made by John Nunn that features 9 consecutive corner-to-corner moves. It can found in Morse's book
|(25) Posted by Michael McDowell [Friday, Jul 12, 2019 09:56]|
Doesn’t that Nunn problem show 18 consecutive corner-to-corner moves? Mark Kirtley and myself have composed selfmates showing 27 consecutive corner-to-corner moves (by bishop and queen respectively).
What about this one?
Special Prize CCC Challenge 1991
(= 11+12 )
1.c7+ Kxc8 2.Bh1 then White plays Ba8/h1 while Black moves his rooks, avoiding repetition, and moving a pawn every 50th move until 452.Bh1 R~ drawing by the 50-move rule. The introductory play is significant in that Black's first move being a capture starts the count for the 50 move rule.
|(26) Posted by Olaf Jenkner [Friday, Jul 12, 2019 15:19]|
The above mentioned problem is here:
|(27) Posted by Rewan Demontay [Friday, Jul 12, 2019 16:41]|
Thanks for those problems! And here is a link to that Nunn problem that I mentioned in yacpdb: www.yacpdb.org/#3" target=_blank>https://www.yacpdb.org/#3
Here the diagram for your convenience. And yes, the solution does contain 18 consecutive corner-to-corner moves with a White light-sqaures me bishop.
John Nunn, 1991, n#24
(= 6+10 )
|(28) Posted by Bojan Basic [Saturday, Jul 13, 2019 18:07]|
Let me share the following (fairy) problem showing "rook-caterpillar".
2nd Prize, Springaren Winter Tourney 2014-15
(= 12+8 )
Solution: 1.Re7*e8 + Ka7-a6 [+bSe7] 2.Re6*e7 + Ka6-a5 [+bSe6] 3.Re5*e6 + Ka5-a4 [+bSe5] 4.Re4*e5 + Ka4-a3 [+bSe4] 5.Re3*e4 + Ka3-a2 [+bSe3] + 6.Re2*e3 + Ka2-a1 [+bSe2] 7.Sd1*b2 Ka1-a2 [+bBb3] #
|(29) Posted by Joose Norri [Tuesday, Jul 16, 2019 20:23]|
Many of the problems along the Bláthy (e.g. P1188172) - Speckmann - Miljanic (P1251710) line include caterpillars, but surely it makes sense to differentiate between these forced marches and problems where they serve some positive purpose.
|(30) Posted by Hauke Reddmann [Tuesday, Jul 16, 2019 23:17]|
Ah, but if Whites march wouldn't be forced, the problem would be cooked,
if Blacks march wouldn't be forced, the problem would be unsolvable :-)
Is "forced only by zugzwang" what you mean?
P.S. Just remembered my problem from the Uelzen SCHWALBE congress:
(= 2+6 )
I think this is "forced" by your definition?!
|(31) Posted by Joose Norri [Wednesday, Jul 17, 2019 01:35]|
Yes of course in a correct problem all moves are forced… so yes, forced by zugzwang, although I think there are a couple of problems where Black delays the mate as much as possible by moving the caterpillar, and not a non-caterpillar pawn.
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MatPlus.Net Forum General Looking for mutual caterpillar problema