4 problem(s) found in 2558 milliseconds (displaying 4 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Opferschlüssel' AND K='Pattaufhebung'] [download as LaTeX]

1 - P1107477
Gunter Jordan
88 Opfer-Opfer-Matt 01/2002

(8+5)
#6

1. Le3! fxe3 2. Ke1 e2 3. f4 exf4 4. Kxe2 f3+ 5. Ke3 f2 6. Td4#

Henrik Juel: C+ Popeye 4.61 (2022-11-08)
comment

Keywords: Stalemate dissolution, Sacrifice key, Provoked check
Genre: n#
FEN: 8/8/8/1pB1p3/1Pk1Pp2/P1pR1P2/2P2K2/8
Reprints: 172 Problemschach-Jahrbuch 2002, p. 76, 03/2003
Input: Gunter Jordan, 2010-06-07
Last update: Gunter Jordan, 2022-11-09 more...

2 - P1380560
Mirko Degenkolbe
Steven B. Dowd
Orbit 2007
Tivadar Kardos gewidmet (und nach)
nach Tivadar Kardos

(2+9) C+
h#10v

1. Lg1 Kxg1 2. e2 Kh1 3. e1=S Kg1 4. Sf3 gxf3 5. e3 f4 6. e2 fxe5 7. e1=S e6 8. Sd3 e7 9. Sc5 e8=S 10. Sb7 Sc7#

Der Versuch 1.Le1? …Kg1 2.e2?? Kh1 3.e1S?? scheitert an schwarzer Seklbstbehinderung.

SCHRECKE: Kardos: P0500795 (2020-10-16)
comment

Keywords: Minimal (B), Sacrifice key, under-promotion (ssS), konsekutive Umwandlungen 3, Smothered mate, Antiphönix, Phoenix, Corner mate, Stalemate dissolution
Genre: h#
Computer test: Gustav 4.0c
FEN: kn6/n7/p7/4p3/4p3/4p1p1/5bP1/7K
Input: Felber, Volker, 2020-10-03
Last update: Felber, Volker, 2021-10-30 more...

3 - P1385832
Kurt Keller
4585 idee & form 149, p. 5047, 01/2021
Weihnachts- und Neujahrsgruss

(10+2)
#5
b) -wBd4
c) ferner -wBb5

a) 1. d6? cxd6 2. b6 d5 3. Lb7 Kb5 4. Kc7 Kc4 5. La6#
4. ... Ka4! 5. Lc6+ Ka3

1. b6! cxb6 2. Kc7 b5 3. Ld7 Kxd5 4. Lf5 Kc4 5. Le6#

b) 1. b6? cxb6!
1. d6! cxd6 2. b6 d5 3. b7 d4 4. b8=D droht 5. Db5#
5. ... dxc3 5. Df4#

c) 1. b5? Kc5!
1. d6! cxd6 2. Kb7 d5 3. La4 d4 4. Lb3+ Kb5 5. a4#

Nr. 4585, K. Keller [Ulm, Germany]: a) 1.d6? c:d6! 1.b6! c:b6 2.Kc7 b5 3.Ld7 K:d5 4.Lf5 Kc4 5.Le6⧧ b) 1.b6? c:b6! 1.d6! c:d6 2.b6 d5 3.b7 d4 4.b8D (5.Db5⧧) d:c3 5.Df4⧧ c) 1.b5? Kc5! 1.d6! c:d6 2.Kb7 d5 3.La4 d4 4.Lb3+ Kb5 5.a4⧧
(Andreas Nievergelt (Winterthur, Switzerland): informalturnier. Lösungen zu Heft i&f 149, in: idee & form 150, p. 5084, April 2021)

Comments:

• Author – Kurt Keller (Ulm, Germany)
• Yet Another Chess Problem Database (...)

Henrik Juel: Part b) is not clearly defined
There is nothing in the diagram on d4 (2021-01-27, hidden)
Mrfery: + WBd4 defines part a) (2021-01-27, hidden)
Kurt Keller: Thanks for the hint. I have corrected the mistake. (2021-01-27, hidden)
Olaf Jenkner: "Fehldruck" dürften die Schweizer als Beleidigung empfinden. Die haben nämöich gar kein Eszett. (2021-01-27, hidden)
Kurt Keller: Danke! "Fehldruck" habe ich gelöscht. (2021-01-27, hidden) more ...
comment

Keywords: Symbol problem (Christmas tree), Stalemate dissolution, Sacrifice key, Sacrifice of white pieces, Active sacrifice, Switchback (k), Option key, Promotion, Pawn mate (c), Symmetrical position, Asymmetrical solution, Twin (triplet), Minimal
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 2K5/2p5/2B5/1P1P4/1PkP4/2P5/P3P3/2R5
Input: Kurt Keller, 2021-01-27
Last update: Kurt Keller, 2021-04-28 more...

4 - P1411829
F. G. Knott
Boston Sunday Post 17/03/1901

(5+2)
#3

1. Lc6! droht 2. Te4#
1. ... dxc6 2. d7 droht 3. d8=D#,d8=T#

Motto: Ich weiss nicht was.
Henrik Juel: C+ Popeye 4.61 (apart from the promotion mate dual) (2023-08-16)
comment

Keywords: Promotion (D,T), Sacrifice key (L), Stalemate dissolution, Minimal, Miniature
Genre: 2#
FEN: 8/3p4/3P4/8/3k4/5B2/2RKR3/8
Input: Rainer Staudte, 2023-08-16
Last update: Rainer Staudte, 2023-08-16 more...

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