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MatPlus.Net Forum General Looking for mutual caterpillar problema

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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.

I knew it!

Krabbé does not have a mutual Rups, but there is Korolkov's yacpdb 275818.

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

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).

Ronald Turnbull
Special Prize CCC Challenge 1991
(= 11+12 )

Draw

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.

The above mentioned problem is here:

http://pdb.dieschwalbe.de/search.jsp?expression=probid=%27P1341253%27

Thanks for those problems! And here is a link to that Nunn problem that I mentioned in yacpdb: 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 )

Let me share the following (fairy) problem showing "rook-caterpillar".

Bojan Bašić
2nd Prize, Springaren Winter Tourney 2014-15
(= 12+8 )
s#7
Circe Parrain
1+0 Ubi-Ubi

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] #

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.

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 )

#6

I think this is "forced" by your definition?!

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.

Hauke, what is exact source of your #6?

@Marjan: a bit complicated. 1995 was the yearly conference of the SCHWALBE
in Uelzen. Together with the local chess club, they brought out a special issue
of the club zine, the (Schach)Kiebitz (very clever, both are birds - and
a Kiebitz is a spectator at chess), and a few problems were made
especially for the occasion. So "H. Reddmann, Schach-Kiebitz, 1995".

EDIT: Should add what Northern Germans call a "Döntsche", just for teh lulz.

I sent in three problems, all somewhat symbol-looking, a German triangle stop sign,
an arrow, and this one, and accompanied them with the quip: "Attention,
there lies Uelzen!" The club introducer to the problems topped it by stating
the "U" looks rather distorted, surely due to the many traffic-related construction
sites in the Uelzen inner city :-)

Hauke

Thanks, Hauke! I have reproduced it in the daily Politika.

Interestingly, the 27 corner-to-corner moves for the Queen, and the 28 for the Bishop, seem to he selfmate records where the piece in question makes consecutive moves between two different squares, aka a pendulum.

I wonder, what are the records for the Rook, Knight, and King?

I managed to make some long ones on my own.

Rook:

WTM,s#23

(= 5+12 )

Knight:

WTM, s#25

(= 5+11 )

King:WTM, s#23

(= 3+12 )

And just for a complete list:

Queen:

Michael McDowell
S2669 The Problemist 26-5, p. 190, 09/2017

P1341253, WTM, s#27

(= 6+12 )

Bishop:

Selfmate in 28
Mark Kirtley
The Problemist, 1994

Found In Tim Krabbe's Diary, #106: https://timkr.home.xs4all.nl/chess2/diary_6.htm

WTM, s#28

(= 7+11 )

I found a new high number for the rook pendulum, afaik, that is more than my s#23 from above.

WTM, s#26

(= 5+12 )

And a slighy improved king’s pendulum.

s#24

(= 3+12 )

Records for directmate pendulums can be found here: http://superproblem.ru/htm/composition/articles/stat64.html