Die Schwalbe

1 problem(s) found in 1797 milliseconds (displaying 1 problem(s)). [PROBID='P1277303'] [download as LaTeX]

1 - P1277303
Tim Krabbé
Schaakbulletin 1972
(9+6) C+
1. e7! droht 2. e8=D,T+ Kd3,Kxf3 3. De2#,0-0#,0-0-0#
1. ... Kxf3 2. e8=T! d4 3. 0-0#
2. ... Kg2 3. 0-0-0-0-0-0#!
2. e8=D? Kg2!
1. ... Kd3 2. e8=D gxf3 3. 0-0-0#
2. ... d4 3. De4#,De2#,0-0-0#
1. ... gxf3 2. e8=D,T+ Kd3 3. 0-0-0#
play all play one stop play next play all
Die Idee dieser "Pam-Krabbe-Rochade" ist vorweggenommen durch P1277302 - die Aufgabe hat aber wegen der in ihr vereinigten drei verschiedenen Rochaden durchaus einen eigenen Wert.
A.Buchanan: I agree that Pam has the idea before Krabbé, but it’s a theme round which many problems can be composed, so I will remove the “anticipated” keyword which is too harsh in its PDB usage. Given that the phrasing of the Laws has now been cleaned up this is an example of the suggested “Principle of Maximal Soundness” which states that a composition is as sound as its maximum value over its lifetime. (2019-12-24)
Henrik Juel: The two dutchmen cooperated in 1972: Pam re-discovered the idea, and Krabbe made this fine joke problem
But the idea was first shown in Skakbladet 1907 by the danish composer C. Staugaard, P1277302
So it ought to be called Staugaard-Rochade, but as Pam-Krabbe-Rochade is already established, I suggest Staugaard-Pam-Krabbe-Rochade
This messy terminology is yet another reason why themes ought not be named after authors, but human vanity has prevented a rational approach... (2019-12-24)
A.Buchanan: "There's nothing new under the sun" was said by many people before Ecclesiastes. This world is not a just one: many things get named after people who weren't their originators or discoverers. It also a huge pain to change the names of stuff, and I wouldn't embark on it unless it's *really* necessary. So it's it's Pam-Krabbe for me, with a touch of the forelock to Staugaard.

I think it's cool that stuff gets named after people though, because it's more personalized, and introduces new distinctive character strings to the universe of names. It would be a huge mistake imho to try to name everything by a clumsy functional description of its content. "Name" & "description" are rightly different things. (2021-01-04)
A.Buchanan: WinChloe hasn't got P-K but it has got Rokagogo, which can be looser. Here's its (edited) solution, where I have asked for variations without threats:
1…g×f3 2.é8=D,T+ Rd3 3.0-0-0‡
1…d4 2.é8=D+ Rd3/R×f3 3.0-0-0,Dé2,Dé4/0-0,Dé2‡
2.é8=T+ Rd3/R×f3 3.0-0-0/0-0‡
1…Rd3 2.é8=D g×f3/Rç2/d4 3.0-0-0/Dé2/0-0-0,Dé2,Dé4‡
2.é8=T g×f3,d4/Rç2 3.0-0-0/0-0-0-0-0-0‡
1…R×f3 2.é8=T d4/Rg2 3.0-0/0-0-0-0-0-0‡
I think Rokagogo is representing P-K faithfully here. (2021-01-05)
James Malcom: Sounds great! It's more an "analogy" though at the moment, as it isn't perfect, since Rokagogo allows for free range castling. Perhaps testing a few more will be needed, if not all? (2021-01-06)
A.Buchanan: In this #3 Black cannot rokagogo. So the condition is a strict improvement of whites capabilities over P-K. The fact that only P-K appears in the full solution and no other rokagogo I think proves that this problem is sound under P-K. So in this case, I don’t think it’s an “analogy”: Wise to be careful though, as we are being in the P-K proof games too (2021-01-06)
Henrik Juel: Another way of partial testing is to check that Popeye without any condition reports no solution, and then check the intended Staugaard castling variation by hand (2021-01-06)
A.Buchanan: @Henrik, and yes this is what had been done in the past. I hope I've explained why for this example, WinChloe Rokagogo + reflecting that Black has no rooks or prospect of any means we can be very confident that it is sound. I hope to test all the P-Ks progressively, and if there are any where I don't think the current WinChloe is good enough, I will then be able to lobby to Christian to get P-K added. There are some proof games in MatPlus right now (http://matplus.net/start.php?px=1609929841&app=forum&act=posts&fid=anti&tid=2302&pid=20388#n20388) where again one needs to think as to whether we can be sure that it's sound. By the way, I have dedicated the best to Staugaard out of respect. There is a similar issue that Dr Robert Norman had the idea that ended being called Bosma (after someone who never managed to compose a sound problem of that form, and denied the critical KvK duel aspect which makes the condition so interesting). But successfully renaming things is very hard: and I am ok these are called Pam-Krabbe & Bosma. We can/should honour Staugaard & Norman in other ways. (2021-01-06)
James Malcom: Yes, you are right. I just reread the definition of Rokagogo, and the king can only move two spaces in any direction anyway. So, at e1/e8, and the promoted rook at the other end, e3/e6 is the only place for the king to castle to. So, unless we are dealing with multiple rooks on the board, basically any PK problem should be C+ by Rokagogo. (2021-01-06)
Keywords: Castling (wk, wl), Joke, Staugaard castling, under-promotion (T), Promotion (D,T), Castling as mating move
Genre: 3#
Computer test: C+ WinChloe if one accepts Rokagogo as a model of Pam-Krabbe, which I think is valid here.
FEN: 8/8/4P3/3p4/2p3p1/1pP1kPPp/1P5P/R3K2R
Reprints: 12 Chess Curiosities [Krabbé] 1 1987
Input: Mario Richter, 2013-09-05
Last update: James Malcom, 2021-01-06 more...
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Mario Richter (1)