Die Schwalbe

5 problem(s) found in 3204 milliseconds (displaying 5 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Bahnung, Räumung' AND A='Christiaans, Frank'] [download as LaTeX]

1 - P0000195
Frank Christiaans
7167 Die Schwalbe 126 12/1990
P0000195
(13+10)
#3
b) wSe4 nach g8
a) 1. 0-0? droht 2. Tf8+ Kd7 3. Lxe6#
1. ... Lxc5! 2. Sxc5 0-0-0!
1. Thf1! 0-0-0 2. Lxe6+ Td7 3. Tf8#
b) 1. Thf1? Lxc5 2. Sxc5 0-0-0!
1. 0-0! Lxc5 2. Sxc5 ... (0-0-0?) 3. Tf8#
play all play one stop play next play all
a) zuletzt h6-h5 und beide Rochaden sind noch möglich. Schläge von Weiß: Bbxc, Bcxd, Bhxg, Bfxg-g8=L.
b) gegenseitiger Ausschluss der beiden Rochaden. 3 Fälle sind zu betrachten:
b1) zuletzt f7xDe6; Weiß muss 4x geschlagen haben: Bfxexdxc8=L, d.h. s0-0-0 ist unzulässig.
b2) zuletzt d7xDe6; zu den 4 Schlägen von a) wird auch der sBf gebraucht, der sich auf f1 umwandeln muss, also w0-0 unzulässig.
b3) zuletzt h6-h5: wBf zieht über f7 zum UW-Feld g8, g.h. s0-0-0 unzulässig.
Henrik Juel: C+ Popeye 4.61 after analysis (2020-10-30)
A.Buchanan: A very harmonious problem. Suppose that both sides retain castling rights. wLh3 is obtrusive, so wBf/h promoted via g7, and escaped via e6 so sBe6 came from d7 later. Wh has made at least 4 pcs, while Bl has made 2 (D & Lc) dxe6, gxh6. If last move was dxe6, then sD & sLc were captured by officers in cage. Thus sBf was captured by wB, and therefore promoted on f1, disrupting wK. Therefore the last move was h6-h5. In (a) there is no problem retaining both castling rights, but in (b) Sg8 must have reached that square via f6 *after* the promotion, disrupting bK. However in (b) the castling rights are incompatible. In (a) 1. 0-0? Lxc5! 1. Tf1!, while in (b) the reverse.
Neither twin is a PRA problem: in (a) there is no conflict between the castling, while in (b) RS applies: the pre-emptive Wh castling means we are in a reality where Bl cannot castle. (2020-10-31)
comment
Keywords: Castling key (wksg), Obvious promotion (L), Retro Strategy (RS)
Genre: Retro, 3#
FEN: r3k3/ppp1p2p/Nb2p3/P1PP2Pp/4N3/7B/3PPRP1/4K2R
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2022-01-07 more...
2 - P1012510
Frank Christiaans
25 The Problemist 3/1993
P1012510
(6+1)
#2
b) Dh3->f1
c) Bb3-
a) 1. De6? droht 2. Dc4#
1. ... Kxd3 2. 0-0-0?
1. Dd7! Kxb3 2. Da4#

b) 1. Ta3! Kb1 2. Kd2#

c) 1. De6! droht 2. Dc4#
1. ... Kxd3 2. 0-0-0#
1. Dd7? Kb3 2. Da4+? Kxa4!
play all play one stop play next play all
No. 2220 HN
Henrik Juel: In parts a and b Ta1 has moved (because Kc2 just came from b1), so White may not castle
These parts are C+ Popeye 4.61
Part c is not clearly defined; if it is Bb3-a3, then it also is C+ Popeye 4.61 (2022-02-19)
A.Buchanan: I agree about part (c). I wonder though about (b) - it seems pointless. If there is also a part (d) which combines (b)&(c), then it does have a unique solution (with checking key) 1. De2+ Kb3 2. Sc5# (2022-02-20)
comment
Keywords: Miniature, Rex solus, Castling (wg), Cant Castler (wg)
Genre: Retro, 2#
FEN: 8/8/8/8/8/1P1N3Q/1Pk5/R3K3
Input: Henri Nouguier, 2004-01-11
Last update: A.Buchanan, 2022-02-20 more...
3 - P1146248
Frank Christiaans
Probleemblad 1999
P1146248
(5+2)
#2
1. 0-0
play all play one stop play next play all
E2-b2 B25TS
SCHRECKE: C+, popeye 4.87
1. 0-0! (Zugzwang)
1. ... Kh3 2. Tf3#
1. ... h3 2. Sf5# (2022-12-21)
comment
Keywords: Miniature Collection (0318448)
Genre: 2#
FEN: 8/8/5N1B/8/7p/4N1k1/8/4K2R
Input: Zuncke/Bruder, 2010-09-11
Last update: Zuncke/Bruder, 2010-09-11 more...
4 - P1381885
Frank Christiaans
Probleemblad 1993
1. Lob #2
151. Thematurnier
P1381885
(5+2) C+
#2
Bosma
1. Se7! zz
1. ... Lh5,Le8 2. Tg8#
1. ... Kg8,La2,Lb3,Lc4,Ld5,Le6 2. Seg6#
1. ... Lg6 2. Tg8,Sexg6#
1. ... Lg8 2. Txg8,Seg6,Sfg6#
play all play one stop play next play all
Henrik Juel: Popeye says 1.Se7 and 1.Sh6
How does the Bosma condition change this?
The intention is probably 1.Sh6, as 1.Se7 entails far more duals (2020-11-14)
A.Buchanan: 1. Sh6? fails to 1. Kg8,La2,...,Le6 as can't unoverload g8. 1.Se7! has duals after Lg6 & Lg8. This isn't great but in better shape than many of the others (2020-11-14)
Henrik Juel: Thanks, Andrew
The weird condition is trickier than I thought (2020-11-14)
A.Buchanan: Haha yes Henrik: they are hard to debug: because it's always unclear whether a piece, of either colour, is helping or hurting :) (2020-11-14)
comment
Keywords: Bosma, Aristocrat
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 5NNk/5bRB/5K2/8/8/8/8/8
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
5 - P1410278
Frank Christiaans
827 Neue Osnabrücker Zeitung 18/02/1995
P1410278
(6+8)
#2
1. Sa6? Sg5! 1. Sd5? b5!

1. Se6! Lb4 2. Sxb4#
1. ... b5 2. Sc5#
1. ... f3 2. Te3#
1. ... Sg1,Sg5 2. Sxf4#
1. ... Ld5 2. Txd5#
1. ... La2 2. De4#
1. ... Sxa4 2. 0-0-0#
1. ... Sd1 Txd1#
play all play one stop play next play all
Jede Figur macht einen Mattzug.
Henrik Juel: dual in two variations 1.Se6 La6,Lb5 2.Td5,De4# (2023-06-11)
comment
Keywords: Zugzwang-Goal, Castling as mating move, Deckungsverlust, Queen sacrifice
Genre: 2#
FEN: 8/2N5/1p6/b3R3/Q1b2p2/2pk3n/1nN5/R3K3
Reprints: 110 Problemschach-Jahrbuch 1995 D , p. 52, 1995
Input: Dieter Berlin, 2023-06-11
Last update: Dieter Berlin, 2023-06-11 more...
Show statistic for complete result. Show search result faster by using ids.

https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+NOT+K%3D%27Bahnung%2C+R%C3%A4umung%27+AND+A%3D%27Christiaans%2C+Frank%27

The problems of this query have been registered by the following contributors:

Gerd Wilts (1)
Henri Nouguier (1)
Zuncke/Bruder (1)
A.Buchanan (1)
Dieter Berlin (1)