Die Schwalbe

9 problem(s) found in 3531 milliseconds (displaying 9 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Mattwechsel']

1 - P1025292
C. G. Sathya Narayanan
The Problemist 1991
3. Preis
P1025292
(11+7)
#2
1. La1,Lc~? droht 2. Tc3#
1. ... Sd6 2. Dd4#
1. ... Dxb5 2. De5#, aber 1. ... De4!
1. Ld4!? droht 2. Tc3,Tc~#
1. ... Dxb5 2. De5#, aber 1. ... Sd6!
1. Le5!!? droht 2. Tc3#
1. ... Sd6 2. Sxe3#, aber 1. ... Dxb5!
1. Lf6! droht 2. Tc3#
1. ... De4 2. Db7#
1. ... Sd6 2. Txd6#
1. ... Dxb5 2. Df7#
play all play one stop play next play all
BS Problemid: 10170
Authors: Narayanan, Chithathuz Gopatan Sathya
Sources:
Years: 1991
SCHRECKE: C+, popeye 4.85 (2020-10-30)
comment
Keywords: Brian Stephenson Collection (10170), White correction, Changed mates, Batteriematt diagonal, discovered checkmate
Genre: 2#
FEN: r3q3/6Q1/1R5r/pPPk1nN1/2R2P2/1BB1p3/K1N5/8
Input: Brian Stephenson, 2004-08-12
Last update: Gunter Jordan, 2020-10-30 more...
2 - P1130947
Mykola Parkhomenko
Grin Pogosjanz Tschepischnyi i drugie 1995
P1130947
(4+3)
#2
1. Sc3
play all play one stop play next play all
B29DD
SCHRECKE: C+, popeye 4.85
1. ... c:b4 2.Dc6#
1.Sc3! (Zugzwang)
1. ... K:b4 2.Da4#
1. ... c:b4 2.Dd5#
1. ... h4 2.Dg4# (2020-11-06)
comment
Keywords: Miniature Collection (0316516), Miniature, x pieces capture on one square (2), x pieces defend on one square (2), Changed mates
Genre: 2#
FEN: 8/3Q4/8/1Np4p/1Pk5/8/2K5/8
Input: Zuncke/Bruder, 2010-09-11
Last update: Gunter Jordan, 2020-11-06 more...
3 - P1148596
Gunter Jordan
3426 Freie Presse (Chemnitz) 09/07/1993
P1148596
(3+3)
#2
* 1. ... f4 2. Dd5#
* 1. ... Te5 2. Db4#

1. Sc4! droht 2. Sd2#
1. ... f4 2. Dd3#
1. ... Te5 2. Dxe5#
play all play one stop play next play all
C4-24DD 2MW
vf: b1=a1, Stefan Dittrich, 23.12.1982, Wetscherni Charkow = P1139627
Henrik Juel: C+ Popeye 4.61 (2020-10-13)
comment
Keywords: Miniature Collection (0020347), Changed mates, Miniature
Genre: 2#
FEN: 8/4r3/3Q4/5p2/4k3/4N3/4K3/8
Input: Felber, Volker, 2010-09-12
Last update: Gunter Jordan, 2020-10-13 more...
4 - P1233983
Ivan Soroka
(40) Selected Selfmates 2011
Alexandr Ashusin 60 JT
Gruppe Miniaturen
3. ehrende Erwähnung
P1233983
(5+2) C+
s#7*
* 1. ... Kb6 2. b8=T+ Ka6 3. Dc8+ Tb7 4. a4 Kb6 5. Dc5+ Ka6 6. Da7+ Txa7#
1. a4 Kb6 2. b8=D+ Ka6 3. Dbc8+ Kb6 4. Dd4+ Tc5 5. Dcd7 Ka6 6. De6+ Tc6 7. Dc8+ Txc8#
play all play one stop play next play all
more ...
comment
Keywords: Changed mates, Umwandlungswechsel
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: K7/1P6/k7/1r6/1PQ5/P7/8/8
Input: Frank Müller, 2012-03-09
Last update: James Malcom, 2020-10-01 more...
5 - P1247666
Mirko Degenkolbe
2211 Freie Presse (Chemnitz) 10/10/1980
P1247666
(10+9) C+
#2*
* 1. ... Dg1 2. Dc2#
* 1. ... Tg7 2. Dc6#

1. Tf5? Shg3!
1. Lf4? Th7!
1. Sg4? Tc5

1. Sd3! droht 2. Sg5#
1. ... Dg1 2. Sxd2#
1. ... Tg7 2. Sc5#
1. ... Seg3 2. Dxd4#
1. ... Shg3 2. Sxf2#
1. ... Kxd3 2. Lf5#
1. ... Tc5 2. Sxc5#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.85 (2020-11-22)
comment
Keywords: Flight giving key, Sacrifice key, Changed mates
Genre: 2#
FEN: 8/2r5/p3BR1B/4N3/Q2bk2K/2P2N1R/1P1pnp2/3q3n
Input: Felber, Volker, 2012-08-27
Last update: Olaf Jenkner, 2020-11-23 more...
6 - P1259692
Steven B. Dowd
Mirko Degenkolbe

1306 Schach in Schleswig-Holstein 01/2013
Lob
P1259692
(7+5) C+
s#11*
1. Dd3+ Kg2 2. Th2+ Kg1 3. De3 Kf1 4. Th1+ Kg2 5. Le4+ Tf3 6. Th2+ Kf1 7. De2+ Kg1 8. De1+ Tf1 9. Tg2+ Kh1 10. Tc2+ Kg1 11. Kc1! Txe1#
play all play one stop play next play all
1. .. Tf1#

1. Dh1+? Tg2 und es geht nicht weiter.
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-11-10)
comment
Keywords: Changed mates, changed blocks
Genre: s#
FEN: 8/8/4p1p1/4P1P1/5B1R/2p2k2/2B2r2/3K1Q2
Input: Frank Müller, 2013-01-17
Last update: Olaf Jenkner, 2020-11-10 more...
7 - P1289680
Steven B. Dowd
3351 idee & form (120) 10/2013
P1289680
(8+2) C+
s#12*
* 1. ... Txf7#
1. Dd7+ Te6 2. Se7+ Kf6 3. Sd5+ Kf5 4. Sc7 Kf6 5. Dg7+ Kf5 6. Df7+ Tf6 7. Dd7+ Te6 8. Tg8 Kf6 9. Tg6+ Kf5 10. Kg8 Kxg6 11. Dh7+ Kf6 12. Se8+ Txe8#
play all play one stop play next play all
more ...
comment
Keywords: Changed mates
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-09-29)
FEN: 6NR/5Q1K/5r1P/5k2/5P2/5BP1/8/8
Input: Frank Müller, 2014-10-25
Last update: Erich Bartel, 2020-09-29 more...
8 - P1314938
Viktor S. Zheglov
Yuri Paramonov


Juri Kalugin MT 2015
3. Preis
P1314938
(4+2) C+
s#9
b) wKb6 nach d7
a) 1. Dc7+ Ka6 2. Tc6+ Kb5 3. Tb6+ Ka5 4. Tb8+ Ka6 5. Ld3+ Db5 6. Lc4 Dxc4 7. Db7+ Ka5 8. Db6+ Ka4 9. Da6+ Dxa6#
b) 1. Td5+ Kc6,Kc8 2. De6+ Kc7 3. Td7+ Kc8 4. Ta7+ Kd8 5. De7+ Kc8 6. Lf5+ Dxf5 7. Db7+ Kd8 8. Dc7+ Ke8 9. Dc8+ Dxc8#
play all play one stop play next play all
Henrik Juel: Part b tested correct by Popeye 4.61 with opt dro 0, so it might be C+ (2016-01-04)
SCHRECKE: a)+b): C+, Gustav 4.1d, Brute Force (2020-10-19)
comment
Keywords: Aristocrat, Changed mates
Genre: s#
FEN: K7/8/1k6/2R1Q2q/8/8/2B5/8
Input: Frank Müller, 2016-01-04
Last update: Marcin Banaszek, 2020-10-19 more...
9 - P1380320
James Malcom
www.chess.com 9/7/2020
P1380320
(9+9)
#5
1. Kd3! droht 2. Ke4 ... 3. Kf3 ... 4. Lxg2#,Lxg4#
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
play all play one stop play next play all
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1

http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
Henrik Juel: Correct key, but damaged by multiple threats and duals, e.g.
1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
more ...
comment
Keywords: under-promotion (T, L), Changed mates, Non-standard material (L)
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
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The problems of this query have been registered by the following contributors:

Brian Stephenson (1)
Zuncke/Bruder (1)
Felber, Volker (2)
Frank Müller (4)
James Malcom (1)