Soluciones 4.13 a 4.16 del libro de Hertan

Ejercicio 4.13

Ftacnik, Lubomir - Cvitan, Ognjen
Bundesliga 97/98

23... Bxg2+! 24. Kxg2 Qh3+! (24... Ng5!? 25. Rf2!) 25. Kxh3 Ng5+ 26. Kg2 Nh4+ (26... Nh4+ 27. Kh1 g2#) 0-1

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Ejercicio 4.14

Illescas Cordoba, Miguel - Yermolinsky, Alex
Madrid 1998

35. g6! hxg6 36. Rg1! Bg7 (36... Be7 37. Qh6! Ne6 38. Rxg6+ fxg6 39. Qxg6+ Kf8 40. fxe7+ Rxe7 41. Rc8+ Nd8 42. Rxd8+ Re8 43. Rxe8#) 37. Rxg6! (37. fxg7 Kxg7) 37... Qb1+ (37... Ne6 38. fxg7 +- (38. Rxg7+ +-)) 38. Kg2 (38. Rg1?? Qxg1+ -+) 38... Ne6 (38... Qb2+ {Lukacs} 39. Kh3 +-) 39. Rxg7+ (39. fxg7?? Nf4+ -+) 39... Nxg7 40. fxg7 (40. Qg5 Qe4+ 41. Kg1 Qb1+ 42. Nf1 +-) (40. Qg3 Qe4+ 41. Kg1 +- (41. Kg1 {Lukacs} Qb1+ 42. Nf1 +-)) 40... Kxg7 (40... Qe4+ 41. Qxe4 fxe4 42. Nf5 +-) 41. Qg5+ Kf8 42. Qh6+ Kg8 43. Qg5+ Kf8 44. Qh5! (44. Qh5 Qa2+ (44... Qe4+ 45. Kf2 Qf4+ 46. Ke2 +- 45. Kh3 Kg8 46. Qg5+ +- (46. Qg5+ {Lukacs} Kh7 (46... Kf8 47. Nxf5 Qb3+ 48. Kh4 Qa4+ 49. Kh5 Qd1+ 50. Kh6) 47. Qh4+ Kg6 48. Rc1+-)) 1-0

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Ejercicio 4.15

Tal, Mihail - Olafsson, Fridrik
Las Palmas 1975

22. ... Qf4!! 23. Re7 Rf8 24. Qa5 Rd1+ 25. Ne1 Qg5 0-1

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Ejercicio 4.16
Parma - Fischer
Bled 1961

21. Rg3+ Kh7 22. Bg6+! Kg7 23. Bh7+!! Kxh7 24. Rh3 1-0