Die Schwalbe

20 problem(s) found in 3792 milliseconds (displaying 20 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Drohmehrzüger' AND A='Keller, Kurt'] [download as LaTeX]

1 - P1374138
Kurt Keller
2020/13 Schach in Schleswig-Holstein 03/2020
P1374138
(5+1) C+
#4
b) Ke1->d1
a) 1. Tc5! Kd3 2. Sf8 Kd4,Ke3 3. Se6+,Se6 Kd3,Ke3 4. Tc3#
1. ... Ke3 2. Tc4 Kd3 3. Se5+ Ke3 4. Te4#

b) 1. Ta3! Kc4 2. Lc6 Kd4,Kb4 3. Kc2 Kc4 4. Ta4#
play all play one stop play next play all
Die Lösungen zur Aufgabe 2020/13 (Kurt Keller) lauten: a) 1. Tc5 Kd3 2. Sf8 Kbel. 3. Se6 (+) Kd3 4. Tc3# sowie b) 1. Ta3 Kc4 2. Lc6 Kb4/Kd4 3. Kc2 Kc4 4. Ta4#. „Als Zwillingsstück akzeptabel“ (Baldur Kozdon). „a) bietet zwei hübsche Varianten mit analogen Springer-Zügen und Rückkehr des weißen Turms im Mattzug. b) fällt demgegenüber ab“ (Stephen Rothwell). „attraktive, übersichtliche Miniatur mit guter Ausnutzung des wenigen Materials“ (Claus Grupen).
(Winus Müller (Rathjensdorf, Germany): Problemschach. Lösungen zur Ausgabe 03/2020, in: Schach in Schleswig-Holstein, 2020-05)
Comments:
  • Note on publication (German): Liebe Löser, die beiden direkten Mattaufgaben sind etwas schwieriger [...]. (Winus Müller (Rathjensdorf, Germany): Problemschach, in: Schach in Schleswig-Holstein, 2020-03)
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (500597)

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comment
Keywords: Rex solus (s), Miniature, Stalemate dissolution, Flight-giving key, Model mate, Switchback (T), Twin
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/1B1N4/8/8/3k4/2R5/1P6/4K3
Input: Kurt Keller, 2020-04-04
Last update: Kurt Keller, 2021-03-30 more...
2 - P1376593
Kurt Keller
C11834 The Problemist 27-9, p. 347, 05/2020
P1376593
(6+9) C+
#5
1. Dxe6? c3!
1. Dxd6? e3!
1. Dxc6? c3!, 1. ... d5!

1. Kc1? e3!

1. Sg3! droht 2. Kc1 droht 3. Le2#, 3. Dxe4#
2. ... c3, 2. ... cxd5, 2. ... exd5 3. Le2#
1. ... Kxd2 2. Dxc4 droht 3. Dc1+ Kd3 4. Le2#, 3. Sf1+ Ke1 4. De2#
2. ... Ke3 3. De2+ Kf4 4. Sxe4 droht 5. Df3#

1. ... c3 2. Da2 droht 3. Le2#
2. ... c2+ 3. Dxc2#
2. ... cxd2 3. Db3#

1. ... e3 2. Dg2 droht 3. De2#
2. ... exd2 3. Df3#
play all play one stop play next play all
C11834 (Keller) 1.Sg3 (>2.Kc1 3.Be2#) Kxd2 2.Qxc4 (>3.Qc1+) Ke3 3.Qe2+ Kf4 4.Sxe4 5.Qf3. It is bad form for the key piece to be en prise – but here the wQ does not make the key move (JGG [Jim G. Grevatt]). Very good key. I spent a lot of time looking at Qxc6,d6,e6 (VS [Victor Snaith]).

(CHAMPIONSHIP ORIGINALS. SOLUTIONS (May), in: THE PROBLEMIST, NOVEMBER 2020)
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Note on publication: C11834 shows a black ‘Lion’s cage’, to compare with the white cage in the last issue – can the en prise wQ be justified?
    (Jim Grevatt (Headly, England): CHAMPIONSHIP ORIGINALS. THREE- and MOREMOVERS, in: THE PROBLEMIST, MAY 2020)
  • Yet Another Chess Problem Database (507767)
  • MESON Chess Problem Database (228175)

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Keywords: Skittles, Skittles setup (Lion's cage), Sacrifice key, Active sacrifice, Passive sacrifice, Sacrifice of white pieces, Flight-giving key, Brian Stephenson Collection (228175)
Genre: n#
Computer test: Henrik Juel: C+ Popeye 4.61 (2020-11-26)
FEN: 8/8/2ppp3/2pQp2B/P1ppp3/3k4/3P4/1K3N2
Input: Kurt Keller, 2020-06-03
Last update: Kurt Keller, 2021-02-27 more...
3 - P1380563
Kurt Keller
1649 Augsburger Allgemeine 02/10/2020
P1380563
(10+4) C+
#5
1. d6! droht 2. Dc6#
1. ... a2 2. Db7 droht 3. Db3#
2. ... a1=S 3. Db1 droht 4. Dxa1 La3 5. Dd1#
3. ... Lb2 4. Dxb2 droht 5. Da2#
4. ... Sc2 5. Db3#
play all play one stop play next play all
Aufgabe Nr. 1649 (Fünfzüger
Keller): 1.d6! (droht 2.Dc6#)
1.-,a2 2.Db7 (droht 3.Db3#)
2.-,a1S 3.Db1 (droht 4.Dxa1,La3 5.Dd1#)
3.-,Lb2, 4.Dxb2 (droht 5.Da2#)
4.-,Sc2 5.Db3#.
Harmloser Löwenkäfig!

(Heinz Däubler (Amberg, Germany): Schach, in: Augsburger Allgemeine, 2020-10-17)
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (520193)

Mirko Degenkolbe: Wenn man auf den Käfig verzichtet (der Schlüssel spielt sich ja quasi "von selbst"), kann man den Inhalt auf das Miniaturformat herunterbrechen:
Kc4, Bb6
Ka4, Lc1, Ba3, Ba5, Bc7.
#5
In diesem weißen Minimal gibt es jetzt eine zusätzliche Verführung und ein zusätzliches Matt im Lösungsspiel.
Außerdem ist der Mattdual aus der Originalversion nicht mehr vorhanden. (2020-10-03)
Kurt Keller: Ein interessantes Problem ohne den Käfig zum Vergleich! Das Minimal enthält nicht mehr "Verführungen" als das Käfigproblem. Die einzige "Verführung" des Minimals scheitert an 6! Verteidigungszügen. Das zusätzliche Matt ist nur vierzügig. Das Ende der vollzügigen Lösung beider Probleme ist gleich. Sieht man von der Teilparade jeweils ab, gibt es keinen Mattdual. (2020-10-04)
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Keywords: Skittles, Skittles setup (lion cage), Line opening, Promotion, under-promotion, Sacrifice of black pieces, Active sacrifice
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/8/8/p2PPP2/k1KPQP2/p2PPP2/8/2b5
Input: Kurt Keller, 2020-10-03
Last update: Kurt Keller, 2020-10-17 more...
4 - P1384836
Kurt Keller
StrateGems 93, p. 51, 01-03/2021
Happy Holidays
P1384836
(9+3) C+
#3 v
1. Kd6? Kxb5 2. Tb1+ Kc4 3. La6#
2. ... Ka4!
2. Ta1 Ka4 3. Ld7#
2. ... Kc4 3. La6#
2. ... c4!

1. Kb6! Kxd5 2. Lf5 c4 3. Td1#
2. ... Kc4 3. Le6#
play all play one stop play next play all
Happy Holidays
By Mike Prcic

As the holiday season approaches, we are reminded of the current COVID-19 pandemic. It has been a difficult time for many of us. I have been in touch with many composers. Many are suffering, especially the older ones. Some are not infected but still need medical care, which is not available, since the hospitals are swamped with COVID-19 patients. One of StrateGems’ editors lost his younger brother to COVID-19. A long-time subscriber from Italy informed me that his whole family was infected. He had the hardest time with the infection but survived and is now COVID-19 negative.
On a positive side (if there is such a thing), we all have ample time for composing (and in my case for playing online bridge). WCCT-11 should benefit from the pandemic. Nevertheless, I hope the vaccine arrives soon, is effective, and that we all can go back to our lives.
To brighten the holiday spirit, Kurt Keller has sent a composition that reminds us of the Christmas tree. Thank you, Kurt!

1.Kd6? Kxb5 2.Rb1+ Ka4! (Kc4? 3.Ba6#);
2.Ra1 c4! (2…Ka4/Kc4 3.Bd7/Ba6#)
1.Kb6! Kxd5 2.Bf5 zz c4/Kc4 3.Rd1/Be6#

(Mike Prcic (Westlake Village, CA): Happy Holidays, in: StrateGems, January 2021)
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

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Keywords: Symbol problem (Christmas tree), Stalemate dissolution, Flight-giving key, Selfblock, Switchback (k,k), Line opening, Symmetrical position, Asymmetrical solution
Genre: 3#
Computer test: Henrik Juel: C+ Popeye 4.61 (2021-01-01)
FEN: 2B5/2B5/2K5/1PpP4/2k5/P1p1P3/2P5/2R5
Input: Kurt Keller, 2021-01-01
Last update: Kurt Keller, 2021-01-09 more...
5 - P1384868
Kurt Keller
2101 Gaudium 235, p. 1, 24/12/2020
Allen Gaudiumlesern zum Fest
P1384868
(10+1) C+
#4
1. Ld8! droht 2. a5 [A] droht 3. Le7#
2. ... Kd6 [a] 3. Lf6 [B] droht 4. c5#
3. ... Kc5 [b] 4. Le7#

1. ... Kd6 2. Lf6 [B] droht 3. c5#
2. ... Kc5 [b] 3. a5 [A] droht 4. Le7#
3. ... Kd6 [a] 4. c5#
play all play one stop play next play all
Den nun schon fast traditionellen Weihnachtsbaum stiftet diesmal unser Leser Kurt Keller aus Ulm. Die Löser mögen beachten, dass dieses Problem ebenfalls am Löseturnier teilnimmt!
(Gunter Jordan (Jena, Germany): Urdrucke, in: Gaudium, Ausgabe 235, 2020-12-24)

2101 (Keller) 1.Ld8! droht 2.a5 [A] (3.Le7#) Kd6 [a] 3.Lf6 [B] (4.c5#) Kc5 [b] 4.Le7#, 1. .. Kd6 2.Lf6 [B] (3.c5#) Kc5 [b] 3.a5 [A] (4.Le7#) Kd6 [a] 4.c5#. Ein Weihnachtsbaum mit thematischem Inhalt (reziproke Züge zwischen [unausführbarer] Drohung und Lösung bei Weiß und Schwarz), was bei Symbolproblemen eher selten ist. Deshalb ragt dieser Festtagsgruß aus der großen Masse heraus (der Autor beglückte im Vorjahr diverse Problemspalten mit Weihnachtsbäumen). „Ein hübscher Baum mit einer moderaten Lösung.“ [Bert Kölske] „☺“ [Berthold Leibe] „Netter Weihnachtsgruß.“ [Karl-Heinz Siehndel] „Ein etwas dürrer Weihnachtsbaum mit nur einer schwarzen Kugel wird im Zugzwang ‚ermattet‘!“ [Joachim Benn] „Eine schlichte Tanne.“ [Claus Grupen]
(Gunter Jordan (Jena, Germany): Lösungen aus Gaudium 235, in: Gaudium, Ausgabe 237, 2021-02-28)
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Gaudium (original problem) (235)
  • Gaudium (solution text) (237)
  • Yet Another Chess Problem Database (...)

Henrik Juel: C+ Popeye 4.61 (2021-01-02)
comment
Keywords: Symbol problem (Christmas tree), Rex solus, Symmetrical position, Asymmetrical solution, Reversal 1 (AaBb-BbAa), Stalemate dissolution, Flight-giving key, Switchback (k)
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 2K5/2B5/8/1PkP4/P1P1P3/P3P3/8/2R5
Input: Kurt Keller, 2021-01-02
Last update: Kurt Keller, 2021-03-04 more...
6 - P1384873
Kurt Keller
C17 Shakhmatnaya Kompozitsiya 154, p. 3, 12/2020
Merry Christmas & Happy New Year! Счастливого Рождества и веселого Нового года!
P1384873
(8+2) C+
#4
b) -Be4
a) 1. Lc5! Kf4 2. Kg2 Kg5 3. Sh3+ Kh4 4. Lf2#
3. ... Kh6 4. Lf8#

1. La3? Kf4 2. Ld6+ Kf3 3. g5 fxg5 4. Lg4#
2. ... Kg5!

b) 1. Se4! Kf4 2. Ld6+ Kf3 3. g5 fxg5 4. Sxg5#

1. Ke1? droht 2. Ld6 droht 3. Le4#
2. ... Kg2 3. Le4+ Kg1 4. Sh3#
1. ... Kf4!

1. La3? droht 2. Lc1 droht 3. Le4+ Kf4 4. d4#
2. ... Kf4 3. d4+ Kf3 4. Le4#
1. ... Kf4 2. Ld6+ Kf3 3. Le4#
2. ... Kg5!
play all play one stop play next play all
С17. К.Келлер. a) 1.c5! f4 2.g2 g5 3.h3+ h4 4.f2#, 3...h6 4.f8#, b) -♙e4, 1.e4! f4 2.d6+ f3 3.g5 fg5 4.:g5#.
(РЕШЕНИЯ «ШК» № 154 – 2020 [SK 154])
Comments:
  • Author - Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

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Keywords: Symbol problem (Christmas tree), Symmetrical position, Asymmetrical solution, Model mate, Switchback (k), Sacrifice of white pieces, Active sacrifice, Deflection, Steering, Minimal, Twin
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 5B2/8/5p2/5B2/4P1P1/5k2/3P1N1P/5K2
Input: Kurt Keller, 2021-01-02
Last update: Kurt Keller, 2021-03-30 more...
7 - P1384874
Kurt Keller
C18 Shakhmatnaya Kompozitsiya 154, p. 3, 12/2020
Merry Christmas & Happy New Year! Счастливого Рождества и веселого Нового года!
P1384874
(8+8) C+
#4
1. Kd7? Kc5 2. Lxd6+ Kc4 3. La8 Kxb5 4. ?

1. Kb7! Kc5 2. Lxb6+ Kc4 3. Le8 Kxd5 4. Lf7#
play all play one stop play next play all
С18. К.Келлер. 1.♔d7? ♔c5! 1.♔b7! c5 2.:b6+ c4 3.e8 :d5 4.f7#.
(РЕШЕНИЯ «ШК» № 154 – 2020 [SK 154])
Comments:
  • Author - Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

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Keywords: Symbol problem (Christmas tree), Symmetrical position, Asymmetrical solution, Switchback (k), Sacrifice of white pieces, Active sacrifice, Line opening, Drag-in sacrifice
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 2K5/2B5/1pBp4/pP1Pp3/p1k1p3/P1p1P3/2P5/8
Input: Kurt Keller, 2021-01-02
Last update: Kurt Keller, 2021-01-06 more...
8 - P1385091
Kurt Keller
Best Problems 97, p. 367, 01/2020
Happy New Year 2021
Šťastný nový rok 2021
С новым годом 2021
Bonne année 2021
P1385091
(6+4) C+
#3 v
1. Le6+? A Kb4 a 2. Sd3+ B Ka4 b 3. Lb3# C
1. ... Kd4!

1. La6+! D Kb4 a 2. Sd3+ B Ka4 b 3. Lb5# E
1. ... Kd4 2. Sb3+ Ke4 3. Ld3#
play all play one stop play next play all
Kurt Keller – (Germania) Christmas card
2B5/2B5/2K5/8/2k5/p1p1p3/P3P3/2N5
≠3 (6+4) C+
1.♗e6+?
1…♔b4 2.♘d3+ ♔a4 3.♗b3‡ but 1…♔d4!
1.♗a6+!
1…♔b4 2.♘d3+ ♔a4 3.♗b5‡
1…♔d4 2.♘b3+ ♔e4 3.♗d3‡
Checking key, 2 model mates.

[...] We thank our colleagues who have sent us greetings from various
countries.

(Antonio Garofalo (Bari, Italy): EDITORIALE, in: BEST PROBLEMS, 2021 - January [BP097.pdf])
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

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comment
Keywords: Symbol problem (Christmas tree), Checking key, Model mate, Changed mates, Symmetrical position, Asymmetrical solution, Selfblock, Remote selfblock, interchange in mating position (LS (4))
Genre: 3#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 2B5/2B5/2K5/8/2k5/p1p1p3/P3P3/2N5
Input: Kurt Keller, 2021-01-07
Last update: Kurt Keller, 2021-01-30 more...
9 - P1385337
Kurt Keller
1562 Troll 3 20/01/2021
P1385337
(3+3) C+
#6
1. Te6! c4 2. Kb4 c3 3. Kb3 c2 4. Tc3 c1=D,T,L,S 5. Txc1 Kd3 6. Td1
3. ... Kc5 4. Txc3+ Kb5 5. Tec6 droht 6. T3c5#
4. ... Kd4 5. Tc1 Kd3 6. Td1#
play all play one stop play next play all
Aufgabe Nr. 1562 (Keller [Ulm, Germany]) 1. Te6! (Zugzwang) 1...c4 2. Kb4 c3 3. Kb3 c2 4. Tc3 c1D 5. T:c1 Kd3 6. Td1, 3...Kc5 4. Tc3+ Kb5 5. Tc6 nebst 6. Tc5 matt, 4...Kd4 5. Tc1 Kd3 6. Td1 matt. (4 Punkte)
(Udo Degener, Grandmaster of Chess Composition (Potsdam, Germany), Unsere Schachseite. Lösungen aus Troll 3/21, in: TROLL 6 2021, p. 28, 2021-03-03 [2021TRO.pdf])
Comments:
  • Yet Another Chess Problem Database (528623)

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comment
Keywords: Miniature, Model mate, Square vacation, Selfblock, Promotion, under-promotion, Line opening
Genre: n#
Computer test: Henrik Juel: C+ Popeye 4.61 (2021-01-15)
FEN: 8/8/8/1Kpp4/3k4/7R/8/4R3
Reprints: 43) idee & form 161, p. 5451, 01/2024
Input: Rainer Staudte, 2021-01-13
Last update: Gunter Jordan, 2024-03-12 more...
10 - P1385832
Kurt Keller
4585 idee & form 149, p. 5047, 01/2021
Weihnachts- und Neujahrsgruss
P1385832
(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#
play all play one stop play next play all
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 (...)

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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...
11 - P1386359
Kurt Keller
C11885 The Problemist 28-1, p. 15, 01/2021
New Year greetings
P1386359
(8+1) C+
#4

Only two #3s this time, and no excessively long moremovers. [...] Keller presents with New Year greetings a symmetrical Christmas tree – but the 2 variations are not symmetrical.
(Jim Grevatt (Headly, England): CHAMPIONSHIP ORIGINALS. THREE- and MOREMOVERS, in: THE PROBLEMIST, JANUARY 2021)
Comments:
  • Yet Another Chess Problem Database (...)
  • Meson Chess Problem Database (249089)

Rosalie Fay: 1. Ld2 zz Kf4 2. Sf1+ Kg4 3. Te4+ Kh5 4. Sg3#;
1. ... Kd4 2. Kd6 zz Ke4 3. Tf2 zz Kd4 4. Tf4#
C+ Popeye Windows-64Bit v4.69 (2023-12-31)
comment
Keywords: Symbol problem (Christmas tree), Option key, Rex solus, Switchback (k), Model mate, Battery creation, Battery play, Discovered check, Batterieabbau (Te2/Se3), Symmetrical position, Asymmetrical solution, Brian Stephenson Collection (249089)
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/8/4K3/3P1P2/4k3/4N3/2P1R1P1/4B3
Input: Kurt Keller, 2021-02-10
Last update: Kurt Keller, 2021-07-20 more...
12 - P1389601
Kurt Keller
2932 ChessStar Static2021 11/05/2021
P1389601
(3+3) C+
#7
1. Kf3? Kf1 2. Sg2 Kg1 3. S6f4 Kf1 4. Se2 Tg1 5. Sg3#
2. ... Tg1!

1. Sh5! Kg2 2. Sh4+? Kg1 3. Kf3 Kf1 4. Sg2 transposes to main line
2. ... Kh3!
2. Sgf4+ Kg1 3. Kf3 Kf1 4. Sg2 Kg1 5. Sg3? stalemate!
5. Shf4 Kf1 6. Se2 Tg1 7. Sg3#
play all play one stop play next play all
Comments:
SCHRECKE: vergleiche: P1124561 (2021-05-15)
comment
Keywords: Miniature (only 6 pieces), Exchange of roles (SS), Stalemate dissolution, Flight-giving key, Stalemate avoidance, Pendulum (k), Switchback (Sk), Selfblock, Square vacation (e2f4g1), Line closing (g1-g3)
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/8/6N1/8/5N2/8/4K2p/6kr
Input: Kurt Keller, 2021-05-15
Last update: Kurt Keller, 2021-05-15 more...
13 - P1392454
Kurt Keller
2021/50 Schach in Schleswig-Holstein 2021/08 08/2021
P1392454
(4+7) C+
#4
1. Tdg2? a4?
1. ... h2!

1. Tgg2! droht 2. Se3 droht 3. Sf5#
2. ... h2 3. Sf5+ Kh3 4. Txg3#
2. ... hxg2+ 3. Kxg2 a4 4. Sf5#

1. ... h2 2. Td3 a4 3. Ta3 Kh3 4. Txh2#
1. ... hxg2+ 2. Kxg2 a4 3. Se3 a3 4. Sf5#
play all play one stop play next play all
Liebe Löser, nach der letzten Serie, die es in sich hatte, kommt dieses Mal etwas leichtere sommerliche Kost.
(Winus Müller (Rathjensdorf, Germany): Problemschach, in: Schach in Schleswig-Holstein, 2021-08)

Die Lösung zur Aufgabe 2021/50 (Kurt Keller [Ulm, Germany]) lautet: 1. Tgg2! (ZZ) a4 2. Se3 h:g2 3. K:g2 a3 4. Sf5# oder 2. … h2 3. Sf5+ Kh3 4. T:g3#, sowie 1. ... h2 2. Td3 a4 3. Ta3 Kh3 4. T:h2# und 1. ... h:g2 2. K:g2 a4 3. Se3 a3 4. Sf5#. „Bereits von der Ausgangsstellung her (Drohung g2+) nicht befriedigend!“ (Baldur Kozdon). „Variantenreich mit sehr ansehnlichen Matts. Gefiel mir ausgesprochen gut“ (Claus Grupen). „Optisch ganz nett und mit drei Varianten auch inhaltlich zufriedenstellend, trotz des unterbeschäftigten Turm auf d2“ (Hanspeter Suwe). „Wie bricht man die schwarze Randkegelfestung auf? Das ungedeckte Satzschach 1. … g2+ gibt den Fingerzeig. Der Clou ist die Vorausfesselung 2. Td3!“ (Stephen Rothwell).
(Winus Müller: Problemschach. Lösungen zu SSH 08/2021, in: Schach in Schleswig-Holstein, 2021-10)
Comments:
  • Yet Another Chess Problem Database https://www.yacpdb.org

A.Buchanan: Hi Kurt thanks for posting this - great stuff! Particularly you are showing how we can raise the bar in terms of html formatting: I will definitely follow your lead. Couple of thoughts...

It's not standard practice to have external clickable links within PDB comment, particularly where the details are replaced by "..." Although stackexchange etc support it, I'm sure they have much more stringent behind-the-scenes security-checking. No problem with having a url though!

And given that YACPDB has about 500K compositions, I don't think we need to indicate that YACPDB contains a particular composition. In the long term, maybe references can be standardized with YACPDB & WinChloe, but in the mean time, if I need to (e.g. suspicious about a diagram) it's easy to check whether a problem appears in one of the other systems. (2021-10-25)
comment
Keywords: Option key, Sacrifice key, Selfblock, Block, Skittles, Skittles setup, Pin, Pinning, Annihilation
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/8/8/p5pp/6pk/6pp/3R4/3N2RK
Input: Kurt Keller, 2021-08-04
Last update: A.Buchanan, 2021-10-25 more...
14 - P1392905
Kurt Keller
Mihail Croitor

1592 Troll 18, p. 28, 18/08/2021
P1392905
(10+7) C+
#12
1. Tc4! Kd5 2. Kg4 Kd6 3. Kf3 Kd5 4. Ke2 Kd6 5. Kd1 Kd5 6. Kc2 Kd6 7. Kc3 Kd5 8. Kb4 Kd6 9. Kb5 Kd5 10. Txa4 Kd6 11. Ta8 Kd5 12. Td8#
play all play one stop play next play all
Aufgabe Nr. 1592 (Keller/Krojtor [Kurt Keller (Ulm, Germany) / Mihail Vasil'evich Krojtor (Moldova)]): 1. Tc4! Kd5 2. Kg4 Kd6 3. Kf3 Kd5 4. Ke2 Kd6 5. Kd1 Kd5 6. Kc2 Kd6 7. Kc3 Kd5 8. Kb4 Kd6 9. Kb5 Kd5 10. T:a4 Kd6 11. Ta8 Kd5 12. Td8 matt. (4 Punkte)
(Udo Degener, Grandmaster of Chess Composition (Potsdam, Germany), Unsere Schachseite. Lösung aus TROLL 18, in: TROLL 21/2021, p. 28, 2021-09-29 [2021TRO.pdf])
Henrik Juel: The keywords almost give away the solution, which is also found by Popeye 4.61 in a few minutes and tested C+ in 27 minutes (2021-09-06)
comment
Keywords: Stalemate dissolution, Flight-giving key, Annihilation, Pendulum (black k), Switchback (black k), Königswanderung
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB), Gustav 4.1 d
FEN: 5b2/2p1p1p1/2PkPpP1/2R2P1K/p2P4/P2P4/3P4/8
Input: Kurt Keller, 2021-08-18
Last update: Kurt Keller, 2021-12-14 more...
15 - P1394681
Kurt Keller
13136 Probleemblad 79-3, p. 13133, 07-09/2021
P1394681
(4+3) C+
#5vv
1. Th4? d4 2. Sd2 droht 3. Th3#
2. ... Ke3 3. Sb2 droht 4. Sd3 droht 5. Th3#
3. ... d3 4. Ke1 d5 5. Sd1#
3. ... Kf2! 4. Sd3+?

1. Tb4? d4 2. Sd2? droht 2. Tb3#
2. ... Ke3! 3. Sb2?

1. Sb2+? Kc3!
1. Sd2? Ke3!

1. Ke1? droht 2. Kd1 d4 3. Sd2 droht 4. Tf3#
1. ... d4 2. Sd2 droht 3. Kd1 droht 4. Tf3#
2. ... Kc2 3. Txd4 droht 4. Txd6 Kc1 5. Tc6#
3. ... d5 4. Txd5 Kc1 5. Tc5#
1. ... Kc2!

1. Tg4! d4 2. Sd2 droht 3. Tg3#
2. ... Ke3 3. Sb2 droht 4. Sd3 droht 5. Tg3#
3. ... d3 4. Ke1 d5 5. Sd1#
play all play one stop play next play all
13136 Keller 1.♖h4? d4 2.♘d2 [3.♖h3#] ♚e3 3.♘b2 [4.♘d3 5.♖h3#] d3 4.♔e1 d5 5.♘d1#, 3… ♚f2! 4.♘d3+?; 1.♖b4? d4 2.♘d2? [2.♖b3#] ♚e3! 3.♘b2?; 1.♖g4! d4 2.♘d2 [3.♖g3#] ♚e3 3.♘b2 [4.♘d3 5.♖g3#] d3 4.♔e1 d5 5.♘d1#. “White correction because of 1.♖f4? d4!, maybe also 1.♖b4? d4! for White correction” (componist). A small change of game (MC [Myloka Chemiaskyi]).
(Henk Prins (Sliedrecht, the Netherlands): Originele Problemen en Oplossingen. Oplossingen orthodox 2021-3 (juli-september), in: PROBLEEMBLAD, januari-maart 2022)
more ...
comment
Keywords: Miniature, White correction, Square vacation, Selfblock
Genre: n#
Computer test: Henrik Juel: C+ Popeye 4.61 (2021-10-17)
FEN: 8/8/3p4/3p4/N4R2/3k4/8/3K1N2
Input: Rainer Staudte, 2021-10-17
Last update: Kurt Keller, 2022-04-03 more...
16 - P1394730
Kurt Keller
2969 ChessStar 20/10/2021
Rasim-100MT
Judge: Ferhat Karmil

P1394730
(8+9) C+
#10
b) wSa6>a4
a) 1. La6? illegal!
1. Lc8! Ka8 2. Sb4 Ka7 3. Sc2 Ka8 4. Sxd4 La7 5. Se6 Lb8 6. Sf8 Ka7 7. Sxg6 Ka8 8. Lb7+ Ka7 9. Se7 g6 10. Sc8#
6. ... La7? 7. Lb7+ Kb8 8. Sd7#
5. ... Kb8 6. Ld7 Ka8 7. Sxc7+ Kb8 8. Sa6+ Ka8 9. c7 Lb8 10. cxb8=D#
9. ... Kb7 10. c8=D#
4. ... Ka7 5. Se6 ... (transposes into lines above)
2. ... La7? 3. Lb7+ Kb8 4. Sa6#

b) 1. Lc8?
1. La6! Ka8 2. Sb2 La7 3. Sc4 Lb8 4. Sd2 La7 5. Sf3 Lb8 6. Sh4 La7 7. Sxg6 Lb8 8. Lb7+ Ka7 9. Se7 g6 10. Sc8#
7. ... Kb8 8. Sf8 Ka8 9. Lb7+ Kb8 10. Sd7#
8. ... g6 9. Sd7+ Ka8 10. Lb7#
6. ... Ka7 7. Sxg6 ...
5. ... Kb8 6. Sh4 ...
4. ... Ka7 5. Sf3 ...
3. ... Kb8? 4. Se5 dxe5 5. fxe5 Ka8 6. Lb7+ Kb8 7. e6 f4 8. e7 f3 9. e8=D#
5. ... f4 6. e6 Ka8 7. Lb7+ ...
6. ... f3 7. e7 Ka8 8. Lb7+ ...
7. ... f2? 8. e8=D#
4. ... Ka8? 5. Lb7+ Kb8 6. Sd7#
2. ... Ka7 3. Sc4 ...
play all play one stop play next play all
Comments:
more ...
comment
Keywords: Twin, Model mate, Switchback, Pendulum, Selfblock, Annihilation, Springerwanderung, Stalemate dissolution, Flight-giving key, Stalemate avoidance, Corner mate
Genre: n#
Computer test: Gustav 4.1 d
FEN: 1b6/kBp3p1/NpPp2p1/1P1P1pP1/3p1P2/3K4/8/8
Input: Kurt Keller, 2021-10-20
Last update: Kurt Keller, 2022-04-03 more...
17 - P1396623
Kurt Keller
13151 Probleemblad 4, p. 110, 10-12/2021
Vrolijke Kerstdagen en Gelukkig Nieuwjaar
Merry Christmas and Happy New Year
P1396623
(9+2) C+
#6 v...
1. c4! Kd4 2. Kd6 droht 3. Lb5 Ke4 4. c5 Kd4 5. Sc6+ A Ke4 6. Ld3# B
2. ... Kxc4 3. La4 Kd4 4. Lb5 Ke4 5. Ld3+ B Kd4 6. Sc6# A
play all play one stop play next play all
Bij de problemen
Aan de zeszet van Kurt Keller kunnen we zien dat de tijd hard gaat. Op het moment van verschijnen van Probleemblad zijn de kersdagen en 2022 nabij. Zijn motto boven het probleem nemen we graag over: “Vrolijke Kerstdagen en gelukkig Nieuwjaar”. Hopelijk vieren we de feesten met minder coronabeperkingen dan vorig jaar. Nuttige tijdsbesteding is natuurlijk om de 15 nieuwe problemen in een gezellige sfeer op te lossen.

From Kurt Keller’s sixmover, we can see that time is going fast. At the time of publication of Probleemblad, Christmas and 2022 are near. We like to adopt his motto above the problem: “Merry Christmas and Happy New Year”. Hopefully we will celebrate the festivities with less corona restrictions than last year. Of course you can use your time well by solving the 15 new problems in a cosy atmosphere.

(Henk Prins (Sliedrecht, the Netherlands): Originele Problemen en Oplossingen. Orthodox, in: PROBLEEMBLAD, oktober-december 2021)

13151 Keller 1.c4! ♚d4 2.♔d6 ♚xc4 3.♗a4 ♚d4 5.♗b5 ♚e4 5.♗d3+ ♚d4 6.♘c6#, 2... ♚e4 3.♗b5 ♚d4 4.c5 ♚e4 5.♗d3+ ♚d4 5.♘c6# of 3.c5 ♚d4 4.♗b5 ♚e4 5.♗d3+ ♚d4 6.♘c6#. En kerstboom met lampjes. Het juiste lampje moet aangestoken worden. Veel lampjes geven kortsluitin door pat. Het lampje aan de andere kant 1.g4? faalt op 1... ♚f4! De witte lamp aan de top zou naar veld i4 moeten, maar ja, dat is buiten de kerstboom.
(Henk Prins (Sliedrecht, the Netherlands): Originele Problemen en Oplossingen. Oplossingen orthodox 2021-4 (oktober-december), in: PROBLEEMBLAD, april-juni 2022)
Henrik Juel: 1.c4 Kd4 2.Kd6 Kxc4 3.La4 Kd4 4.Lb5 Ke4 5.Ld3 Kd4 6.Sc6#
dual 2... Ke4 3.Lb5,c5 (2021-12-05)
comment
Keywords: Symbol problem (Christmas tree), Stalemate dissolution, Flight-giving key, Sacrifice of white pieces (B), Passive sacrifice, Minimal, Symmetrical position, Asymmetrical solution
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 4B3/4N3/4K3/3P1P2/4k3/2P1p1P1/4P3/4B3
Input: Kurt Keller, 2021-12-05
Last update: Kurt Keller, 2022-06-23 more...
18 - P1402955
Kurt Keller
3675 ChessStar 23/07/2022
P1402955
(2+5) C+
h#5
1. a4 bxa4+ 2. Kc4 a5 3. Kb5 a6 4. Ka5 a7 5. b5 a8=D,T#
play all play one stop play next play all
Comments:
SCHRECKE: Umwandlungsdual (a8T#) im Hilfsmatt ist nicht jedermanns Sache - meine auch nicht! (2022-07-23)
Henrik Juel: so the problem is not C+... (2022-07-23)
Kurt Keller: see keyword "tolerated dual promotion":
"Sometimes, the mating move is a promotion, and both D/T would mate. Similarly, sometimes D/L would both work. This is a tolerated dual under Article 13 of the Codex, because if it were not allowed, too many matrices would be invalid."
Article 13 (https://www.wfcc.ch/1999-2012/codex/):
"(2) Help-play compositions are unsound also if they are dualized, except that in the final move a promotion into different pieces having partially the same power (for example queen/rook or queen/bishop) may be tolerated [16]."
Therefore, the problem is sound (C+). (2022-07-23)
comment
Keywords: Symbol problem (cross), Kindergarten Problem, Minimal (B), Miniature, Symmetrical position, Asymmetrical solution, Sacrifice key, Sacrifice of black pieces (active), Active sacrifice, White correction (for Black), Selfblock, Switchback (k), Promotion in the mating move, Tolerated dual promotion (D/T)
Genre: h#
Computer test: Gustav 4.1 d
FEN: 8/1K6/1p6/pkp5/1p6/1P6/8/8
Input: Kurt Keller, 2022-07-23
Last update: Kurt Keller, 2022-10-28 more...
19 - P1406712
Kurt Keller
12857 feenschach 250, p. 1023, 10-12/2022
Frohe Ostern
P1406712
(3+5) C+
h=4
b) an der mittleren Horizontale gespiegelt (Kc1/Kc3)
a) 1. b5 Kd8 2. bxc4 Ke7 3. Kd5 Kf6 4. c6 Kf5=
b) 1. Kb4 Le4 2. Ka3 Lxd3 3. Ka2 Lxc4 4. Ka1 Lxb3=
play all play one stop play next play all
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Für den Ostergruß wurde das Problem offensichtlich zu früh gebracht. Das Problem selbst ist jedoch für die Weihnachtszeit geeignet, da die beiden Kreuze auch als Weihnachtsbaum oder Kerze betrachtet werden können. (The problem was obviously brought up too early for the Easter greeting. However, the problem itself is suitable for the Christmas season because the two crosses can also be considered a Christmas tree or candle.) Vergleiche (Compare) P1388082
  • Source: Urdruckteil_250.pdf on http://www.feenschach.de

Henrik Juel: solutions
a) 1.b6-b5 Kc8-d8 2.b5*c4 Kd8-e7 3.Kc6-d5 Ke7-f6 4.c7-c6 Kf6-f5 =
b) 1.Kc3-b4 Bc6-e4 2.Kb4-a3 Be4*d3 3.Ka3-a2 Bd3*c4 4.Ka2-a1 Bc4*b3 = (2022-12-14)
comment
Keywords: Symbol problem (Doppelkreuz), Twin, Asymmetrical solution, Selfblock, Passive sacrifice, Annihilation, Remote selfblock, Sacrifice of white pieces, Sacrifice of black pieces, Active sacrifice (L), Symbol problem (Kerze), Symbol problem (Weihnachtsbaum)
Genre: Fairies
Computer test: Gustav 4.1 d
FEN: 2K5/2p5/1pkp4/2p5/2P5/2B5/8/8
Input: Kurt Keller, 2022-12-14
Last update: Kurt Keller, 2023-01-06 more...
20 - P1408699
Kurt Keller
Best Problems 106, p. 617, 04/2023
Happy Easter 2023
P1408699
(7+3) C+
s#6
1. Ld4! Kh6 2. Dxg7+ Kg5 3. Df6+ Kh6 4. Kh4 Kh7 5. Df7+ Kh6 6. g3 g5#
play all play one stop play next play all
Comments:
more ...
comment
Keywords: Symbol problem (Osterkreuz - 2), Symbol problem (Petruskreuz), Symbol problem (Osterkerze)
Genre: Fairies
Computer test: Gustav 4.1 d. Henrik Juel: C+ Popeye 4.61 also (2023-04-05)
FEN: 6Q1/6p1/6p1/6k1/6P1/5PKP/6P1/6B1
Input: Kurt Keller, 2023-04-05
Last update: Kurt Keller, 2023-04-05 more...
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The problems of this query have been registered by the following contributors:

Kurt Keller (18)
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