Die Schwalbe

3 problem(s) found in 6791 milliseconds (displaying 3 problem(s)). [COMMENTDATE>=20200919 AND COOKED AND K='Pickaninny'] [download as LaTeX]

1 - P1214355
Helmer Ludvig Ternblad
2081 Springaren 08/1953
nach Rusek
P1214355
(10+7) cooked
s#3
1. Df6! exd6 2. Td8 d5 3. Tdxd5 Ta1#
1. ... exf6 2. Sxf6 Kxc3 3. Te4 Ta1#
1. ... e6 2. Txe6 fxe6 3. De5 Ta1#
1. ... e5 2. Se3+ Kxc3 3. Tb8 Ta1#
2. ... Kc5 3. d7 Ta1#
play all play one stop play next play all
vgl. Rusek 1995 Springaren 1953
Cook: 1. dxe7! f5 2. Se3+ Kc5 3. Df6 Ta1#
1. Txe7! f5 2. Dc8+ Kd5 3. Te6,Dc7 Ta1#
SCHRECKE: 2 Nebenlösungen
1.d:e7 f5! 2.Se3+ Kc5 3.Df6 Ta1#
1.T:e7 f5! 2.Dc8+ Kd5 3.Te6,Dc7 Ta1# (2021-01-04)
SCHRECKE: Rusek: P1214345 (2021-01-08)
comment
Keywords: Pickaninny
Genre: s#
FEN: 4R2Q/4pp2/3P2p1/6R1/P1k3N1/p1P2N2/rpP5/1K6
Input: Frank Müller, 2011-10-11
Last update: Marcin Banaszek, 2021-01-07 more...
2 - P1226153
Erich Ernst
3214 Badische Neueste Nachrichten 11/06/1994
P1226153
(10+5) cooked
#3
1. Lxe6! (2. c8=S+ 3. Le7#)
1. Lxe6! fxe6 2. c8=T
1. Lxe6! fxg6 2. c8=L
1. Lxe6! f5 2. c8=S+
1. Lxe6! f6 2. c8=D
play all play one stop play next play all
Rosalie Fay: 1 ... f5 doesn't parry the threat. 1 ... fxg6 2 c8=B/Sf8 both work, so this line is dualistic. So no Pickaninny and no AUW. (2020-09-26)
A.Buchanan: I've been meaning to ask about threats, and here's a good chance. They are a cool shorthand for many solutions, and some folks have invented themes about them. But (as here) they destroy the logic of many problems where Black has a limited choice of moves, so we shouldn't apply them robotically, imho.
One obvious case is that in a problem where *every* Black move counters the threat, the threat is meaningless. Another obvious case is if it only counters one Black move, then it's kind of lame and again meaningless as shorthand. So unless there is an artificial theme declared with the solution, a threat should not be given unless it works against at least two Black moves.
Here every Black play except for 1... f5 defeats the "threat". Even 1... Kc5 which leads to the short solution 2. Le7# also refutes 2. c8=S. There *is* a theme AUW/Pickaninny, but the symmetric expression of this threatless theme is actually damaged by including a threat in the solution. (2020-09-27)
A.Buchanan: According to the Codex, a directmate or selfmate is unsound if it is cooked [i.e. has a solution that differs in its first move from the author’s solution] or has a short solution or no solution. The gravity of defects such as unintended duals, or unintended multiple refutations of [intended] tries is a matter for a tourney judge.
One issue with PDB is that we do not have a "sound/unsound" field, nor even a keyword for this! But even a brutally dualized problem can never be classified as cooked, and this one is only mildly dualized. (2020-09-27)
A.Buchanan: I am not trying to be "kind to duals" here. They are defects, and I applaud Henrik's analysis of them. Since we are not running a tourney, could we imagine some formula based on the graph structure of the solution which will automatically give us a figure. E.g. dual-less = 0, any dual in 2nd move is twice as bad as a dual in 3rd move, etc? The length & breadth of the problem would has to be a factor. Can we construct an ideal solution, suppressing all duals, and come up with a comparison of that? E.g. sum(i=2..n) (d_i - s_i)/(2^i), where d_i & s_i are the number of dual moves & solution moves respectively occurring at the ith White move. (2020-09-27)
A.Buchanan: I agree with Rosie that 1 ... fxg6 2 c8=B/Sf8 is fatal to the intended AUW. Replacing wSh7 with sBf8 or wBg7g8 does restore AUW, but with an obvious cost. [Legality does not affect soundness, according to the Codex.] As discussed earlier, I think the problem is still Pickaninny as the threat is meaningless. (2020-09-27)
comment
Keywords: Allumwandlung, Pickaninny
Genre: 3#
FEN: N1B5/2P2p1N/3kp1R1/1P2p1B1/2P1p3/4P1K1/8/8
Input: Felber, Volker, 2011-12-02
Last update: James Malcom, 2020-09-26 more...
3 - P1252301
G. Karlsson
Our Folder 08/1924
P1252301
(11+4) cooked
#3
1.b7 e5/e\x f6/e\x d6/e6
2.b8=D[S]/T/L/S
play all play one stop play next play all
Erich Bartel: Nachdruck:
1) Themes-64 (2) IV 1956 (2012-10-27)
Rosalie Fay: 1 ... e5 doesn't parry White's key's threats, and 1 ... e6 2 Sb6+/b8=S+ both work, so no Pickaninny.

No Black move uniquely forces 2 b8=S, so no AUW. (2020-09-26)
comment
Keywords: Allumwandlung, Pickaninny
Genre: 3#
FEN: B5Kb/P2kp1nR/1P1N1BR1/3N1P2/3P4/8/8/8
Input: Erich Bartel, 2012-10-27
Last update: James Malcom, 2020-09-27 more...
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The problems of this query have been registered by the following contributors:

Frank Müller (1)
Felber, Volker (1)
Erich Bartel (1)