Nightmare Nr.001

Georgiev - Ionescu

Constantin 1986

21.Lxh7++- [21.Sg4? Sg6=;

21.Se4? Sg6=] 21...Kxh7

[21...Kh8 22.Dh5+-] 22.Se4

Kg8 [22...g6 23.Dg4 Lg7

(23...Kg8 24.Dh4+-) 24.Dh4+

Kg8 25.Dxe7+-] 23.Sg5 g6

[23...Sf5 24.Sxf5+-; 23...f6

24.exf6+-] 24.Sg4 Sf5

[24...Lg7 25.Sf6+ Lxf6

(25...Sxf6 26.exf6+-) 26.exf6

Sf5 27.Df3+-; 24...b5 25.Df3

Sf5 26.Dh3+-; 24...Tc5

25.Df3+-] 25.Txf5 exf5

[25...gxf5 26.Sf6++-]

26.Df2+-

Nightmare Nr.002

De Limburg 1900

1.g4+- [1.g3? Lxg3 2.Kxg7

Ld6=; 1.Kf5? Ld6=; 1.Lf3? Ld4

2.d8D+ Kxd8 3.Kf7 Lc5=;

1.Kg5? Lf6+ 2.Kf5 (2.Kg4

Kd6=) 2...Ld4=] 1...hxg3

[1...Lc3 2.d8D+ Kxd8 3.Kf7 Lf6

4.Lc6 Lg5 (4...Le7 5.Kxg7+-)

5.Kxg7+-; 1...Lf6 2.g5+-;

1...Ld4 2.d8D+ Kxd8 3.Kf7+-]

2.h4 Lf6 3.h5 Le5 [3...Lb2

4.Lg2+-] 4.Lg2 Lc3 [4...Lc7

5.Kxg7 Kxe6 6.Lh3+ Ke7

7.h6+-] 5.d8D+ Kxd8 6.Kf7

Lb4 7.Lh3 Ld6 8.Kxg7+-

Nightmare Nr.003

Mishin-Kuznecov

CorrGame 1991

16...Txc3 mit Angriff 17.Dxc3

[17.bxc3 Da5 18.Lc4 Sd7 19.f4

Sf6 20.Te1 Da3+ 21.Kd1 Se4

mit Angriff] 17...Se4 18.Db4

Sf2 mit Angriff

Glarean Magazin / 2004/05

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Das Glarean Magazin

The Nightmare...ist eine Sammlung von extremen Schach-Aufgaben, die zu lösen auch für

neueste Hard- und Software ein ganz besonderer «Alptraum» darstellen dürfte.

Denn diese dreissig Mittel- und Endspiel-Stellungen sind nicht einfach «bloss»

schwierig, sondern sie legen den Finger je ganz gezielt in die quasi

«strukturellen» Wunden der Schachprogrammierung...

Trotzdem sind die Positionen wohl nicht grundsätzlich unlösbar; für einen

Programmierer dürfte es also recht aufschlussreich sein, wie lange seine Engine

jeweils zu knabbern hat.

Anwendern, welche die Sammlung als Test-Suite verwenden möchten, empfehle

ich bei sehr schneller Hardware eine Bedenkzeit von mindestens fünf, ansonsten

mindestens zehn bis fünfzehn Minuten pro Stellung.

Die Kommentierungen wurden in besonders sorgfältiger häuslicher Analyse-Arbeit

erstellt; gleichwohl können/wollen sie nicht erschöpfend sein, sondern verstehen

sich nur als Skizzierungen.

Viel Spass!

Walter Eigenmann / Rothenburg 2005

1 von 6

Nightmare Nr.004

Skuja&Giese 1934

1.c6+- [1.cxd6? hxg6=;

1.gxh7+? Kxh7=] 1...Txc6

[1...d5 2.Tc3 hxg6 a) 2...e5

3.a4 bxa4 (3...d4 4.Tc1 bxa4

(4...hxg6 5.axb5+-) 5.b5+-)

4.c7 d4 5.Tc5 a3 (5...hxg6 6.b5

a3 7.b6+-) 6.Td5 Tf8+ 7.Kg2

a2 8.Td8+-; b) 2...d4 3.Tc1+-;

3.a4 bxa4 4.b5 a3 (4...d4

5.Tc1+-) 5.Txa3 Kf7 (5...d4

6.Ta4+-) 6.Tc3 Ke7 7.b6 Tf8+

8.Ke2+-; 1...e5 2.a4 bxa4

3.b5+-; 1...hxg6 2.Tc3+-]

2.Tf8+ Kxf8 3.gxh7 Tc2+

4.Kg3 Tc3+ 5.Kg4 Tc4+

[5...d5 6.h8D+ Kf7 7.Da8+-;

5...e5 6.h8D+ Kf7 7.Dd8+-;

5...Ke7 6.h8D Txa3 (6...Tc4+

7.Kg5+-) 7.Dxg7++-] 6.Kg5+-

Nightmare Nr.005

Troitzky 1928

1.Le2++- [1.Lf1? Dg7 2.Lh3+

(2.Lxa6 Dxd4 3.Le2+ Kf5 4.e7

De5-+) 2...Kf3 3.Lg2+ (3.g4

Dxd4-+) 3...Ke3=; 1.Lxa6?

Dxe6 2.Le2+ Kf5 3.Lxh5 De1=;

1.d5? Df6 2.Le2+ Kf5 3.Ld3+

Ke5=; 1.Ld5? Dg7 2.Se2 Df6=]

1...Kf5 2.Sd5 Dxe6 [2...Dd8

3.e7+-] 3.Ld3+ Kg4 4.Le4

Dh6 [4...Dxe4 5.Sf6++-]

5.Sf4 Df6 [5...Dg7 6.Sd3

Dxd4 7.c6 Dxe4 8.Sf2++-;

5...Dh8 6.Sd3+-] 6.Sd3 Dxd4

7.c6 Dxe4 [7...a5 8.b5 Dxe4

9.Sf2++-] 8.Sf2++-

Nightmare Nr.006

Nunn - Shirov

Dt.BL 1996

23...Txc4 Initiative [23...h6?!

24.Lxf6 Lxf6 25.Tfa1=;

23...Lxb5?! 24.cxb5 h6

(24...Dc7 25.Tc1=; 24...Db6

25.Le3=) 25.Lxf6 Lxf6

26.Tfa1=; 23...Ta8?! 24.Tfa1

Lb7 25.Sc1 Db6 26.Sb3=;

23...Lb7?! 24.Tfa1=] 24.Lxf6

[24.Dxc4 Db6 25.Dc7 Dxb5 mit

Angriff] 24...Lxf6 25.Dxc4

Db6 26.Dc7 Dxb5 27.Dxd6

[27.Te1 Ld8 28.Dxd6 Db6

29.Dxe5 Lf6 mit Angriff]

27...Kg7 mit Angriff

Nightmare Nr.007

Matous 1975

1.Lc7 [1.gxh7+? Kh8=;

1.gxf7+? Dxf7+=; 1.Dxa8?

De6+=] 1...Dxc8 2.gxf7+

Kh8 3.Le5 Dc5 4.Lb2 Sc7

5.La1 a4 6.Lb2 a3 7.La1 a2

8.Lb2 a1D 9.Lxa1 Sd5+

10.Ke6+ Sc3 11.Lxc3+ Dxc3

12.f8D#

Nightmare Nr.008

Jussupow - Kasparov

Linares 1990

39...c3-+ [39...Td8? 40.Dxb4

Dxe4 41.g4 Le6 42.De7 Td2

(42...Td3 43.Df6+=) 43.Df6+

Kg8 (43...Kf8 44.Dh8+ Ke7

45.Df6+=) 44.Tg3 Da8 (44...c3

45.f5=) 45.f5=; 39...Ld7?

40.Dxb4 mit Angriff] 40.Txc3

[40.Dxe8 Dd7 41.Dxd7 Lxd7

42.e6 (42.Td3 Le6-+; 42.Tf1

b3-+) 42...Lxe6 43.f5 (43.e5

Ld5-+) 43...Lc4 44.f6+ Kg8-+;

40.Tf1 Ld7 41.Da2 Le6-+]

40...Ld7 41.Tc4 Lxa4

42.Txd4 Tb8 43.Lf1 [43.Td2

b3-+; 43.g4 Lc2-+] 43...Lc2

44.Lc4 b3-+

Nightmare Nr.009

Akesson-Shulman(Var)

RiltonCup 1999

17.Txe4+- Lh2+ 18.Kxh2

Dxe4 19.Te1 Dxc4 20.b3

Dc5 [20...Db5 21.Lh6 Tf5

22.Sb6+-; 20...Da6

21.Sxc7+-] 21.Le7+-

The Nightmare

2 von 6

Nightmare Nr.010

Queckenstädt 1920

1.g4+- [1.d4? exd4 2.Le2 d3+

3.Kxd3 Lc6 4.a7 c4+ 5.Kd2 e5

6.Lf3 e4=; 1.Le2? e4 2.dxe4

Lc6=] 1...Lc6 [1...La4+ 2.Kd2

Lc6 3.Lg2 Kb5 4.a7 Ka6 5.Lxc6

Kxa7 6.Ld7 f5 7.g5+-; 1...f5

2.Lg2 e4 3.dxe4 Lc6 4.exf5

Lxg2 5.fxe6+-] 2.Lg2 Lxg2

3.e4 f5 [3...c4 4.a7 cxd3+

5.Kxd3+-] 4.gxf5 exf5 [4...c4

5.fxe6 cxd3+ 6.Kd2+-] 5.a7

fxe4 6.d4 e3 [6...exd4 7.a8D

d3+ 8.Kc1+-] 7.dxe5+-

Nightmare Nr.011

Volokitin - Kozul

Portoroz 2001

14.Sxf7+- [14.Se4? Sxe4

15.Dxe4 Lf6=] 14...Kxf7

[14...Db6 15.De6+-] 15.De6+

Kf8 [15...Kg6 16.d4 Se5

17.Txe5 dxe5 18.Ld3+ e4

19.Lxe4+ Kh5 20.Dh3#] 16.g4

a6 [16...Db6 17.g5 Dxb2

(17...Tad8 18.gxf6 Sxf6 19.Te2

Dxb2 20.Tg2+-) 18.gxf6 Sxf6

19.Le5+-; 16...h6 17.h4+-]

17.g5+-

Nightmare Nr.012

Hasek 1928

1.Kd4= [1.Sf4? a5 2.Kd2 Lg8

3.Kc1 Lh7-+; 1.Se5? Lg8-+;

1.Kd2? a5-+] 1...a5 2.Sc5

Lg8 [2...a4 3.Sxa4 Kxa4 4.Kd3

Kb5 5.Kd2 Kc4 6.Kc1=] 3.Sa4

Kxa4 [3...Lh7 4.Kd5 Le4+

5.Kd4=] 4.Kc5 Ld5 5.Kb6=

Nightmare Nr.013

Akopian - Khenkin

Tilburg 1994

15.Txf4 Initiative Lxf4

[15...Ld4+ 16.Kh1 Sce5

17.Sxe5 Lxe5 18.Taf1 mit

Angriff] 16.Sd5 Sce5 [16...Lg5

17.Tf1 Sd4 (17...Txg6

18.Dxg6+-) 18.h4+-]

17.Sdxf4 d6 [17...Txg6

18.Sxg6 d6 19.Tf1 mit Angriff]

18.Tf1 mit Angriff

Nightmare Nr.014

Kasparian 1954

1.h4+= [1.Ta3? Td3 2.Kg2

Kh4 3.Kg1 (3.Kf2 f3-+; 3.h3

Lc6+-+) 3...f3 4.Kf2 Tc3 5.h3

(5.La4 Txa3 6.Lxb5 Kg4-+)

5...Td3-+] 1...Kxh4 2.Th6+

Kg5 [2...Kg3 3.Tg6+ Kf2

(3...Kh3 4.Th6+=) 4.Tg2+ Ke3

(4...Ke1 5.Ld5 Tf1+ a) 5...Td3

6.Tg4 Td4 (6...f3 7.Lxf3=)

7.Kg1=; b) 5...Th3+ 6.Kg1

Le2 7.Tf2=; 6.Kh2 Le2 (6...Tf2

7.Kg1 Txg2+ 8.Lxg2=; 6...f3

7.Tc2 Le2 8.Tc1+ Ld1 9.Lc4

Tf2+ 10.Kg3 Tg2+ 11.Kf4 f2

12.Txd1+ Kxd1 13.Kf3=) 7.Tg6

Kf2 (7...Lf3 8.Lxf3 Txf3=)

8.Tb6=) 5.Ld5 Tf1+ (5...Th3+

6.Kg1=) 6.Kh2 Le2 7.Tg8 Lf3

8.Lxf3 Kxf3 9.Tf8=] 3.Th5+

Kxh5 4.Ld1 Kg4 5.Kg2 Lc6

6.Le2 Ld5 7.Ld1=

Nightmare Nr.015

Hellers - Hansen

Malmo 1997

20.Lxh6= [20.f6? Txc3

21.fxe7 Te8 22.Dd1 Txe7-+]

20...gxh6 [20...Txc3 21.Dd2

Te3 22.Lxg7=] 21.f6

(Var): 21...Txc3 [21...Sec6

22.Dd2+-; 21...Sac6 22.Dd2=]

22.Dd2 Te3 23.fxe7 Te8

[23...Tb8 24.g5 De8 (24...Sc4

25.Df2+-) 25.Dg2+-; 23...Ta8

24.g5 Txe1 25.Dxe1+-;

23...Tc8 24.g5 Txe1 (24...De8

25.g6+-) 25.Dxe1+-] 24.Sg6

fxg6 [24...Da3 25.Df2=]

25.Df2 Txe1 26.Df7+ Kh8

27.Txe1=

The Nightmare

3 von 6

Nightmare Nr.016

Saemisch 1922

1.Ke7+- [1.Kg7? a1D 2.Txa1

Txa1 3.f8D Te1 4.Df2 Te4=;

1.Kg8? a1D=] 1...Te3+ 2.Kf6

Tf3+ [2...Tb3 3.Ta1 Tf3+ 4.Ke7

Te3+ 5.Kd6 Tf3 6.Txa2+ Kb8

7.Ke7+-] 3.Kg7 Ta3 [3...Ka6

4.f8D Txf8 (4...Tb3 5.Da8+ Kb5

6.Dxa2+-) 5.Kxf8 Kb5 6.Tc1

Kb4 (6...a1D 7.Txa1 Kc4

8.Td1+-) 7.Ke7 Kb3 8.Kd6+-;

3...b6 4.f8D Txf8 5.Kxf8 bxc5

6.dxc5+-] 4.f8D a1D 5.Txa1

Txa1 6.Df2+-

Nightmare Nr.017

Kramnik - Bareev

WijkAanZee 2003

46.Lf6+- [46.Ke4? Tc8=;

46.a3? Tc8=] 46...g6

[46...gxf6 47.exf6 Tc8

(47...Sh4 48.Kg4+-) 48.Txc8

Kxc8 49.Kg5 Kd7 (49...Sd4

50.h6+-) 50.a3+-; 46...a3

47.Lxg7 Sxg7 48.h6 f6 49.hxg7

fxe5+ 50.Kxe5 Txg7 51.Kd6+-]

47.hxg6 fxg6 48.Kg5+-

Nightmare Nr.018

Chandler - Wahls

NoviSad 1990

18...Kh8?+- [besser 18...Lxf6

19.gxf6 Txd1+ 20.Kxd1 Dc8=]

19.Ld3 Sd5 [19...Txd3

20.Txd3 Sd5 a) 20...Lc4

21.Tdd1+-; b) 20...Sc4 21.Sh5

Lf8 (21...Sxe5 22.Dxe5+-)

22.Lc3+-; 21.Sxd5 Lxd5

22.h4+-; 19...Sd7 20.Dh4+-]

20.Dh4+-

Nightmare Nr.019

Asauskas - Malisauskas

Vilnius 2004

19.Df6++- [19.Tgh3? Th8=]

19...Lxf6 [19...Kg8 20.Txh7

Kxh7 21.Th3+ Kg8 22.Dh8#]

20.gxf6+ Kg8 [20...Dxf6

21.exf6+ Kxf6 (21...Kg8

22.Txh7 Kxh7 23.Th3++-)

22.Lxc5+-] 21.Txh7 Kxh7

22.Th3+ Kg8 23.Lh6 Dc7

24.f4+-

Nightmare Nr.020

Lommer 1963

1.Sab3++- [1.Sxc2+? Kb1

2.Sa3+ Kc1=] 1...Kb1 2.Sb5

h5 [2...h6 3.gxh6+-] 3.gxh6

gxh6 [3...g5 4.h7 g4 5.h8D g3

6.Dh1+ Sc1 7.Sc3#] 4.e4 h5

5.e5 h4 6.e6 h3 7.e7 h2

8.e8D h1D 9.Dg6+-

Nightmare Nr.021

Uhlmann - Malich

Berlin 1968

53...Txf2+= [53...Lc5?

54.Td8+ Ke7 (54...Kg7

55.d4+-) 55.Td7+ Ke6

(55...Kf8 56.d4+-) 56.d4 Lb6

57.Kf3+-] 54.Kxf2 [54.Kg1

Tb2=] 54...Lc5 55.Kf3

[55.Ke3 f5 56.h4 (56.g4 Kf7=)

56...gxh4 57.gxh4 Ke7 58.Ld7

Kf6=] 55...Lxd4 56.Ke4 Lf2

57.g4 Lb6=

Nightmare Nr.022

Kortschnoj - Shirov

Madrid 1996

24...Tf6 Initiative [24...d3?!

25.Dxd3 f3 26.Dc3 Dg3

Nightmare Nr.023

Geller - Filipowicz 1970

18.Sc5+- [18.Tac1? 0-0=;

18.Tad1? 0-0=; 18.Tfd1? 0-0=]

18...Lxc5 [18...Dd6

Nightmare Nr.024

Van Scheltinga 1941

1.Kc2+- [1.Te8+? Kxe8 2.a7

a2 3.a8D+ Ke7=; 1.a7? a2

2.Te8+ Kxe8 3.a8D+ Ke7=]

The Nightmare

4 von 6

27.Tf2=; 24...f3?! 25.Lxf3 Lxf3

(25...Txf3 26.Txf3=) 26.Txf3

Txf3 27.Dxf3 Tf8 28.Dg4 Df2+

29.Kh1=] 25.Lxd4 [25.Db5

f3-+; 25.c5 Tg6-+] 25...Tg6

26.Kh1 [26.Dd3 Dg5 27.Tf2 f3

28.e5 (28.c5 Dg3 mit Angriff)

28...dxe5 mit Angriff; 26.Lxa7

Txe4-+] 26...Txg2 27.Kxg2

Txe4 mit Angriff

19.Tad1+-] 19.Lxc5 Lb5

20.Df2 Lxf1 [20...Sc6

21.Sxb5 axb5 22.a6+-]

21.Lxb4 Lc4 [21...Lb5

22.Sxb5 axb5 23.Le2+-]

22.b3 Lb5 23.Sxb5 axb5

24.Le2+-

1...a2 [1...Th2+ 2.Kb1 Tb2+

3.Ka1 Tb4 4.Ka2 Ta4 (4...Txd4

5.Kxa3 Td1 (5...Txf4 6.Th8+-)

6.Kb2 Td2+ (6...Td4

7.Ta7++-) 7.Kb3 Td1 8.Ta7+

Kf8 9.Tb7 Ta1 10.a7+-) 5.a7

Ta6 (5...Ta5 6.f5 exf5 7.e6 f6

(7...f4 8.Th8+-) 8.gxf6+ Kxe6

9.Te8++-) 6.f5 exf5 7.e6+-]

2.Kb2 Ta3 3.Ka1 Ta4

[3...Kd7 4.a7 Kc6 5.Tc8+ Kb7

6.Tf8 Kxa7 7.Txf7++-] 4.a7

Ta6 [4...Ta3 5.f5+-] 5.f5 exf5

6.e6 f4 [6...f6 7.gxf6+ Kxe6

8.Te8++-] 7.Th8 f3 [7...f6

8.gxf6+ Kxe6 (8...Kxf6

9.a8D+-) 9.a8D Txa8 10.Txa8

g5 (10...Kxf6 11.Tf8++-)

11.Tg8+-; 7...Kxe6 8.a8D Txa8

9.Txa8 Kf5 10.Tf8+-] 8.a8D

Txa8 9.Txa8 f2 10.Ta7++-

Nightmare Nr.025

Kholmov - Bronstein

Kiew 1964

18.Sc6 mit Angriff Sxc6 19.e5

Lg5+ [19...Lxe5 20.f6 Lxf6

21.Ld3 Lg5+ 22.Txg5 mit

Angriff] 20.Txg5 f6 21.exd6

Df7 22.Tg3 bxc3 23.Lc4+-

Nightmare Nr.026

Nunn - Ward

GB-TC 1998

20.Lg7+- [20.Sh4? Tab8=;

20.Tde1? Tab8=] 20...Lxg7

[20...Tab8 21.Lxh8 Kxh8

(21...Lxf5 22.Lxf6+-;

21...Dxb2+ 22.Kd2+-)

22.Sxe7+-; 20...Lxf5 21.Lxh8

Kxh8 22.gxf5+-] 21.Sxg7

Teb8 [21...Kxg7 22.Sd5 Dc5

(22...Sxd5 23.Dh6++-)

23.Dh6+ Kf7 24.g5+-;

21...Tab8 22.Sxe8 Lxe8

23.b3+-] 22.Sh5 Sxh5

[22...Dxb2+ 23.Kd2 Lc6

(23...Se8 24.Dxe7+-; 23...Tf8

24.Sxf6+ exf6 25.Dd5++-;

23...Sxh5 24.gxh5+-)

24.Sxf6+ exf6 25.Dxf6+-;

22...Se8 23.Sf4 De3+

(23...Dxb2+ 24.Kd2 Db6

(24...Sf6 25.Txh7+-)

25.Ke2+-) 24.Td2 Sf6 25.Scd5

Sxd5 26.Dxd5++-] 23.gxh5

Le8 [23...Dxb2+ 24.Kd2 Db6

25.Ke2+-] 24.b3+-

Nightmare Nr.027

Kasparian 1969

1.Ld4= [1.Kg1? e3 2.Kf1

(2.Td1 Lc2-+) 2...Lh5 3.Lc3

Kg3 4.Tg8+ (4.Le1+ Kf3 5.Td3

Tb1-+) 4...Lg4-+] 1...Tb1+

[1...Tb4 2.Kg1 Kg3 3.Lf2+ Kf3

(3...Kxf4 4.Tf8+ Ke5 (4...Lf5

5.Kf1=) 5.Le3=) 4.Td1 e3

5.Lh4=] 2.Lg1 e3 [2...Lf7 3.f5

Lc4 (3...e3 4.Td3 Kg4

5.Txe3=) 4.f6 Tf1 (4...e3 5.f7

Lxf7 6.Td3 Kg4 (6...Te1

7.Txe3+) 7.Td4+ Kf5 8.Kg2=)

5.Td7 Txf6 6.Td2=; 2...Lf5

3.Td3+ Kg4 4.Td2 Kxf4 5.Tf2+

Ke5 6.Td2=] 3.Th8+ Kg4

[3...Kg3 4.Tg8 Kf3 (4...Kh4

5.Txg6 e2 6.Te6=) 5.Txg6 e2

6.Te6=] 4.Tg8 e2 [4...Kf5

5.Kg2 e2 6.Lf2 Tf1 7.Tf8+ Ke6

8.f5+ Ke7 9.Lc5+=] 5.Txg6+

Kf5 [5...Kf3 6.Te6 e1D

7.Txe1=] 6.Tg5+ Kf6

[6...Kxf4 7.Tg2 e1D 8.Tf2+ Ke4

(8...Dxf2=; 8...Ke5 9.Te2+=)

9.Te2+=] 7.Te5=

The Nightmare

5 von 6

Nightmare Nr.028

Kesoene-Rubtsova

WCh-Final 1984

15.Sf5 mit Angriff [15.Tg3?!

g6=] 15...g6 [15...exf5

16.Dxf7+ Kh8 17.Dxe8+ Lf8

18.Dxf8#; 15...Sxb3+ 16.axb3

Se5 (16...g6 17.Sh6+ Kg7

18.Dh4 mit Angriff) 17.Sxg7

Kxg7 18.Ld4 b4 (18...Kg8

19.Tg3 Td8 20.f4 mit Angriff)

19.f4 bxc3 20.Lxc3 mit Angriff;

15...Td8 16.Ld5 g6 (16...Lb7

17.g6 fxg6 (17...hxg6

18.Txg6+-) 18.Txg6 hxg6

19.Dxg6+-) 17.Dh6 Lf8 18.Lxc6

Dxc6 19.Dg7+ Lxg7 20.Se7+

Kh8 21.Sxc6 mit Angriff;

15...Se5 16.Sxe7+ Txe7 17.f4

Sxb3+ 18.axb3 Sg6 19.f5 mit

Angriff] 16.Sh6+ Kg7

[16...Kh8 17.Sxf7+ Kg8 18.Dh4

Tf8 (18...Kxf7 19.Dxh7+ Kf8

20.Tg4+-) 19.Sh6+ Kh8 20.Sg4

mit Angriff; 16...Kf8 17.Dh3

Sxb3+ 18.axb3 mit Angriff]

17.Dh4 b4 [17...Sxb3+

18.axb3+-; 17...Se5 18.Ld4 b4

19.Sa4+-] 18.Sa4 Sxb3+

19.axb3 Se5 [19...Tb8 20.Sg4

Kh8 21.Tg3+-] (Var.):

20.Ld4+-

Nightmare Nr.029

Shredder6

-Crafty18.12(Var)

CompGame 2002

16...Te8= [16...a5? 17.fxe5

Lxb3 (17...dxe5 18.Dxd8 Lxd8

(18...Txd8 19.Sxa5+-)

19.Sc5+-) 18.cxb3 dxe5

19.Dd5 Dxd5 (19...Td7

20.Db5+-) 20.Txd5+-;

16...Dc7? 17.f5 Ld7 a)

17...Lxb3 18.cxb3 Dd8

(18...Tc8 19.Lc4+-; 18...Td8

19.Lc4+-) 19.Lc4 Td7

20.Ld5+-; b) 17...Lc8

18.Lxh6+-; 18.Lxh6 Tc8

(18...Dd8 19.Tf3 Lh4 (19...Lf6

20.Tg3+-) 20.Th3+-) 19.f6+-]

17.fxe5 [17.f5 Ld7=]

17...dxe5 18.Dxd8 [18.De1

Dc7=] 18...Txd8 19.Txd8+

Lxd8=

Nightmare Nr.030

Vrabec 1999

1.Sf1= [1.Ta6+? Kb7 2.Ta2 b3

3.Td2 (3.Tb2 Tc8+ 4.Kd3

Ka6-+) 3...Tc8+ 4.Kb4 Lc2-+]

1...Le2+ [1...b3 2.Sd2 Ka7

(2...Th3 3.Tf6 b2 (3...f3

4.Sxb3=) 4.Txf4=) 3.Tb4 Th3

4.Kc5 Tc3+ (4...Td3 5.Sxb3 f3

6.Sa5 Ka6 (6...f2 7.Sc6+ Ka6

8.Tb6#) 7.Sc4 f2 8.Tb6+ Ka7

9.Tf6=) 5.Kd4 Tg3 (5...Th3

6.Kc5 f3 7.Sxb3=) 6.Ke4=]

2.Kxb4 Tf8 [2...Lxf1 3.Tf6 Th4

(3...Tb8+ 4.Ka3 Tc8 5.Txf4=)

4.Ka5 Lh3 a) 4...Kb8 5.Tf8+

Kc7 (5...Kb7 6.Txf4=) 6.Txf4=;

b) 4...Th8 5.Txf4=; 5.Kb6 Kb8

(5...Th8 6.Txf4=; 5...Lc8

6.Tf8=) 6.Tf8+ Lc8 7.Tf7 Th6+

8.Kc5=] 3.Sh2 Ka7 [3...f3

4.Sxf3=] 4.Te6 Ld1 [4...f3

5.Te3=] 5.Te1 Lh5 6.Te5=

The Nightmare

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