Petrosian vs Fischer 1971

[Ampzilla]

Can Any Engine find 42. F4


937: Petrosian,T - Fischer,R, Candidates Match final 1971
[d]8/r6p/P4p2/1k2p1p1/3pP1P1/2bK4/R4P1P/6N1 w - - 0 1

Analysis by Naum 3:

42.Nf3
-/+ (-0.77) Depth: 1/10 00:00:00
42.Nf3 Rxa6
-/+ (-0.77) Depth: 2/10 00:00:00
42.Nf3 Rxa6 43.Rxa6
-/+ (-0.93) Depth: 3/8 00:00:00
42.Ne2 Bb4 43.Ng3
-/+ (-0.87) Depth: 3/10 00:00:00
42.Ne2 Ba5 43.Nc1 Rc7
-/+ (-0.93) Depth: 4/12 00:00:00
42.Ne2 Ba5 43.Nc1 Rc7 44.a7
-/+ (-0.93) Depth: 5/14 00:00:00
42.Ne2 Ba5 43.Nc1 Rc7 44.Ne2 Kxa6
-/+ (-0.95) Depth: 6/14 00:00:00 15kN
42.Ne2 Ba5 43.Nc1 Rc7 44.Rb2+ Kxa6 45.Ne2
-/+ (-0.96) Depth: 7/18 00:00:00 23kN
42.Ne2 Ba5 43.Nc1 Rc7 44.Ne2 Kxa6 45.Rb2 Be1
-/+ (-0.96) Depth: 8/20 00:00:00 37kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.f3
-/+ (-1.03) Depth: 9/18 00:00:01 58kN
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4 gxh4 45.Nxh4 Kb5 46.Nf5
-/+ (-0.85) Depth: 9/20 00:00:01 78kN
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4 gxh4 45.Nxh4 Be1 46.Ke2 Ba5
-/+ (-0.95) Depth: 10/20 00:00:01 108kN
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4 h6 45.hxg5 hxg5 46.Ng1 Kb5 47.Ne2
-/+ (-1.05) Depth: 11/21 00:00:01 167kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.f3 Kb5 47.Ng3
-/+ (-1.01) Depth: 11/22 00:00:01 221kN
42.Ne2 Ba5 43.Nc1 Rc7 44.Rb2+ Kxa6 45.Ne2 Be1 46.Rb1 Bxf2 47.Rf1 Be3
-/+ (-1.04) Depth: 12/26 00:00:01 429kN
42.Ne2 Ba5 43.Nc1 Rc7 44.Rb2+ Kxa6 45.Ne2 Rb7 46.Rxb7 Kxb7 47.Ng3 Kc6 48.Nh5
-/+ (-1.01) Depth: 13/25 00:00:01 667kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Be7 47.Ng3 Kb6 48.Nf5 Bc5
-/+ (-1.03) Depth: 14/33 00:00:02 1773kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3 Kb7 48.Kd3 Kc6 49.Nh5
-/+ (-1.01) Depth: 15/26 00:00:02 2313kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nf5 Kc5 48.Ng7 Kc6 49.Nf5 Kb5
-/+ (-1.02) Depth: 16/27 00:00:02 3019kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nf5 Kc5 48.Ng7 Kc6 49.Ne8 Be7 50.f3
-/+ (-1.02) Depth: 17/28 00:00:03 4052kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Bf8 45.Rb2+ Kxa6 46.f3 Rb7 47.Rxb7 Kxb7 48.Ng3 Kc6 49.Nf5 h6 50.h3 Kb6
-/+ (-1.02) Depth: 18/32 00:00:05 7192kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Bf8 45.Rb2+ Kxa6 46.Ra2+ Kb6 47.Rxa7 Kxa7 48.Ng3 Ka6 49.Kc4 Kb6 50.Nf5 Kb7 51.h3
-/+ (-1.01) Depth: 19/33 00:00:10 14516kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Bf8 45.Rb2+ Kxa6 46.Ra2+ Kb6 47.Rxa7 Kxa7 48.Ng3 Ka6 49.Nh5 Be7 50.h3 Kb5 51.Ng7 h6
-/+ (-1.01) Depth: 20/39 00:00:15 21361kN
42.Ne2 Ba5 43.Rb2+ Kc6 44.Rc2+ Kb6 45.Rb2+ Kxa6 46.f3 Rc7 47.Rb8 Rb7 48.Rxb7 Kxb7 49.Ng3 Kc6 50.Nf5 Bb4 51.h4 Bc5 52.h5
-/+ (-1.01) Depth: 21/43 00:00:49 70454kN, tb=4
42.Nf3 h6 43.h4 Ba5 44.Rb2+ Kxa6 45.Rb3 Rb7 46.Rxb7 Kxb7 47.hxg5 hxg5 48.Nh2 Kc6 49.Nf1 Kd6 50.Ng3 Ke7 51.Nf5+ Kd7 52.Ke2
-/+ (-0.91) Depth: 21/43 00:01:21 122mN, tb=983
42.Nf3 h6 43.h4 Ba5 44.Rb2+ Kxa6 45.Rb3 Rb7 46.Rxb7 Kxb7 47.hxg5 hxg5 48.Nh2 Kc6 49.Nf1 Kd6 50.Ng3 Kd7 51.Nh5 Bd8 52.Ng7 Be7
-/+ (-0.93) Depth: 22/35 00:01:30 136mN, tb=1064
42.Nf3 h6 43.h4 Ba5 44.Rb2+ Kxa6 45.Rb3 Rb7 46.Rxb7 Kxb7 47.hxg5 hxg5 48.Nh2 Kc6 49.Nf1 Kd6 50.Ng3 Kd7 51.Nh5 Ke7 52.Ng7 Bb4 53.Kc4
-/+ (-0.91) Depth: 23/36 00:01:54 172mN, tb=1406


937: Petrosian,T - Fischer,R, Candidates Match final 1971
[d]8/r6p/P4p2/1k2p1p1/3pP1P1/2bK4/R4P1P/6N1 w - - 0 1

Analysis by Rybka 2.3.2a mp 32-bit :

42.Nf3 Rxa6
-/+ (-0.86) Depth: 5 00:00:00
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4
-/+ (-1.00) Depth: 6 00:00:00 2kN
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4 gxh4 45.Nxh4 Kb5
-/+ (-1.04) Depth: 7 00:00:00 3kN
42.Nf3 Rxa6 43.Rxa6 Kxa6 44.h4 h6 45.hxg5 hxg5 46.Ng1
-/+ (-1.30) Depth: 8 00:00:00 4kN
42.Ne2 Ba5 43.Nc1 Rxa6 44.Nb3
-/+ (-1.16) Depth: 8 00:00:00 7kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3
-/+ (-1.19) Depth: 9 00:00:00 12kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Be1
-/+ (-1.13) Depth: 10 00:00:00 23kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3
-/+ (-1.07) Depth: 11 00:00:00 38kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ka5 47.Ng3 Ka4
-/+ (-1.12) Depth: 12 00:00:00 49kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Bd6 47.Ng3 Kb6 48.Nf5
-/+ (-1.09) Depth: 13 00:00:00 66kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Bd6 47.Ng3 Kb6 48.Nf5 Kc6
-/+ (-1.13) Depth: 14 00:00:00 92kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba3 47.Ng3 Kb6 48.Nf5 Kc6
-/+ (-1.11) Depth: 15 00:00:01 167kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3 Kb7 48.Nh5 Bd8
-/+ (-1.13) Depth: 16 00:00:01 239kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3 Kb7 48.Nh5 Bd8
-/+ (-1.13) Depth: 17 00:00:02 334kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3 Kb7 48.Nh5 Bd8
-/+ (-1.12) Depth: 18 00:00:03 503kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Kc4 Ba5 47.Ng3 Kb7 48.Nh5 Bd8
-/+ (-1.11) Depth: 19 00:00:07 931kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nh5 Be7 48.Ng7 Bd8
-/+ (-1.11) Depth: 20 00:00:10 1308kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nh5 Be7 48.Ng7 Bd8
-/+ (-1.11) Depth: 21 00:00:18 2169kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nh5 Be7 48.Ng7 Kc6
-/+ (-1.10) Depth: 22 00:00:50 5948kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nh5 Be7 48.Ng7 Kc6
-/+ (-1.10) Depth: 23 00:01:05 7814kN
42.Ne2 Ba5 43.Rb2+ Bb4 44.Ra2 Rxa6 45.Rxa6 Kxa6 46.Ng3 Kb5 47.Nh5 Be7 48.Ng7 Kc6
-/+ (-1.09) Depth: 24 00:01:45 12465kN



(937) Petrosian,Tigran V (2640) - Fischer,Robert James (2760) [A06]
Candidates Match final Buenos Aires (6), 17.10.1971
[PS]
1.Nf3 c5 2.b3 d5 3.Bb2 [3.e3!? f6 4.d4!] 3...f6 [3...Nc6 4.e3 a6 Andersson-Spassky/Goteborg/1971] 4.c4 [4.e4 Keene 1977 4...dxe4 5.Nh4 Nh6µ (5...g5 6.Qh5+ Kd7) 6.Qh5+ g6 7.Qxc5 g5–+ Bagirov,V-Sakaev,K/Moscow Alekhine op 1992] 4...d4 5.d3 [5.b4!? Averbach] 5...e5 6.e3 [6.g3 Nc6 7.Bg2 Shamkovich] 6...Ne7 7.Be2 [7.exd4 cxd4 8.b4?! a5 9.a3 Na6 10.Qb3 Ng6 11.b5 Nc5µ Shamkovich] 7...Nec6 8.Nbd2 Be7 9.0–0 0–0 10.e4 [¹10.exd4 cxd4 Korchnoi] 10...a6 [10...Na6 11.Ne1 Nc7 12.g3 Ne6 13.f4 Shamkovich] 11.Ne1 b5 12.Bg4! Shamkovich 12...Bxg4 13.Qxg4 Qc8! 14.Qe2 Nd7 15.Nc2?! [¹15.g3 Korchnoi,Shamkovich …f4] 15...Rb8 [15...Nb6?! 16.Na3 Averbach] 16.Rfc1 Time:1:10 16...Qe8 Time:0:56 17.Ba3 Bd6 18.Ne1 g6 19.cxb5? [19.Rc2 Nb4 (19...Qe7 20.Rac1 Rfc8 21.g3 Qd8 22.Qg4!) 20.Bxb4 cxb4 21.Rac1 Shamkovich; ¹19.g3 Averbach] 19...axb5 20.Bb2 Nb6 21.Nef3? [21.a4 bxa4 22.bxa4 Nxa4 23.Nc4 Nxb2 24.Nxb2 Rf7 25.Nc4 Bf8µ Shamkovich; ¹21.g3 Shamkovich] 21...Ra8 22.a3 Na5 23.Qd1 Qf7 …¦fc8, c4 24.a4 bxa4 25.bxa4 c4 [25...Rfc8 Korchnoi 26.Ba3 Bf8 27.Rab1³ Averbach/Shamkovich] 26.dxc4 Naxc4 27.Nxc4 Nxc4 28.Qe2 Nxb2 ! Larsen [28...Rfc8 !µ/–+ Vitolinsh 29.Rc2 …¤d2 (29.a5 Bb4 30.a6 d3! Vitolinsh; 29.Ne1 f5! 30.Nd3 Qb7µ) 29...Kg7 30.Rac1! (30.a5? Bb4 31.a6 Qd7!–+ Agur 32.Rxc4 d3 33.Rxc8 dxe2–+ PS) 30...Rxa4 31.Nd2! d3! 32.Qxd3 Nxb2 33.Qxd6 Rd4 34.Qa6= Agur; 28...Na5!? Korchnoi 29.Ba3 (29.Rab1 Rfb8µ; 29.Nd2 Bb4!–+) 29...Bxa3 30.Rxa3 Rfc8 31.Qd1 (31.Raa1 Nb3 32.Rxc8+ Rxc8 33.Rb1 Qc4 34.Qxc4+ Rxc4) 31...Qb7! 32.Nd2 Rxc1 33.Qxc1 Rc8 34.Qa1 Rc2µ Averbach] 29.Qxb2 Rfb8 30.Qa2 Time: 2:00 30...Bb4 Time: 1:44 [30...Qxa2?! 31.Rxa2 Kf7 32.g4 Ke6 33.Nd2µ /³ Averbach] 31.Qxf7+ Kxf7 32.Rc7+ Ke6 33.g4! !…f5 [‹33.Rxh7 Bc3 34.Rd1 Rxa4 …¦a2, ¦bb2, d3 Shamkovich; 33.Rc6+ Bd6 (33...Ke7 34.g4) 34.g4 …¤d2-c4 34...Rb2 35.a5 Kd7 36.Rc4 Ra6µ Averbach] 33...Bc3 34.Ra2 [34.Rd1! Rc8 (34...Rxa4? 35.Rc6+ Ke7 (35...Kd7?? 36.Rxc3) 36.Rc7+ Kf8 37.g5) 35.Rxh7 Rxa4 36.Rg7 g5 37.h4 Averbach] 34...Rc8 [34...Rb4? 35.Rc6+ Kf7 36.g5 Averbach] 35.Rxc8 Diesen Zug spielte Petrosian ohne weitere Überlegung.Time: 2:10 [35.Rxh7 d3 (35...Rc4 36.Rb7 Rcxa4 37.Rxa4 Rxa4 38.Rb6+ Kd7! 39.g5 (39.Rb5 …¦d5= Averbach) 39...d3 40.gxf6 a) 40.Rb7+ Kd6 (40...Kc6 41.Rb3 Rc4 42.gxf6 d2 43.Nxd2 Bxd2 44.f7 Bh6 45.Rb8= Averbach) 41.Rb5 Ra5 42.Rb3 Rc5 43.gxf6= Averbach; b) 40.Rb5?! Ra6 41.gxf6 d2 42.Rb1 (42.Rd5+ Rd6–+) 42...Rxf6 43.Kg2 Rd6 44.Rd1 Rd3µ Averbach; 40...Ra1+ 41.Kg2 d2 42.f7 Ke7 43.Rb7+ Kf8 44.Ng5 Rg1+!–+ Korchnoi) 36.Rb7 Ba5! 37.Rb5 Rc1+ 38.Kg2 Bc3 39.Rb3 (39.Rd5! Rc2 40.Ra3 d2 41.Rb3= Averbach) 39...Rc8–+ …¦c2 Korchnoi ] 35...Rxc8 Time: 1:59 36.a5 [36.Kf1! Kd6 37.Ke2 g5 38.Kd3 Kc5 39.Nd2 Kb4 40.a5 Bxd2 (40...Ra8 41.Nc4) 41.Kxd2 Ra8 42.Rb2+„ Vitolinsh] 36...Ra8 37.a6 Ra7 38.Kf1 …Kd3, g5 38...g5! 39.Ke2 Kd6 40.Kd3 Kc5 41.Ng1 Time: 2:40 [41.h4 ?Korchnoi 41...gxh4 (41...h6 42.h5! Kb5 ! (42...Kb4 43.Nd2 Bxd2 44.Kxd2 Kb5 45.Rb2+ Kxa6 46.Rb8=) 43.Ng1‡ (43.Nd2–+) 43...Ba5 44.Ne2 Rxa6 45.Ng3 Rc6 46.Rc2 Bc3! 47.Nf5 Ra6 48.Nxh6 Ra3! 49.Ke2 Bb4–+ Shamkovich) 42.Nxh4 Kb4 43.Nf3 (43.f4! Kb3 44.Rh2! Rxa6 45.fxe5 fxe5 46.Nf3 Ra1 47.Rxh7 Rd1+ 48.Ke2 Kc2 49.Nxe5³ Shamkovich) 43...Kb3–+ Korchnoi; 41.Nd2 Bxd2 42.Kxd2 Kb5 43.Rb2+ Kxa6µ /–+ Vitolinsh] 41...Kb5µ AbbruchstellungTime: 2:17 [41...Kb4 42.Ne2 Kb3 43.Nc1+ Shamkovich] 42.Ne2? [42.f4 gxf4 (42...exf4 43.Nf3 Rxa6 44.Rxa6 Kxa6 45.e5 fxe5 46.Nxg5²) 43.g5 (43.Nf3 h6! 44.h4 Rxa6 45.Rxa6 Kxa6 46.g5 fxg5 47.hxg5 hxg5 48.Nxg5 (48.Nxe5–Matanovic+) 48...Ba5 49.Nf3 Bc7–+ Shamkovich) 43...fxg5 44.Nf3 g4 45.Nxe5 h5 46.Ng6= ] 42...Ba5 43.Rb2+ [43.Ng3 Kxa6! (43...Rxa6 44.Nf5 Rc6 45.Rc2 Rc3+ (45...Rxc2 46.Kxc2 Bb4 47.h4 Bf8–+ ×d3, b¢‚« Nur die Position ¢e2 und ¤d3 verspricht eine uneinnehmbare Festung. Shamkovich) 46.Rxc3 dxc3 47.Ne7=) 44.Nf5 Rc7 (44...Rb7 45.Nd6 Rb3+ 46.Kc4) 45.Rc2 Rb7 46.Rc6+ Ka7 47.Rc5 Be1 48.Ke2 Bc3–+; 43.Nc1 Rxa6 44.Nb3 Kb4 (44...Ra8! 45.Ra1 Ra7 (45...Kb4 46.Rb1) 46.Ra2 Kb4 47.Nc1 (47.Na1 Rc7 48.Nc2+ (48.Rc2 Rxc2 49.Kxc2 Kc4–+) 48...Kb3 49.Ra3+ Kb2–+ Averbach/Petrosian) 47...Rc7 (47...h5!?) 48.Rc2 Averbach/Petrosian) 45.Rb2 (45.Na1! Rc6 46.Nc2+ Kb5 (46...Kb3 47.Nxd4+!) 47.Na3+ Kc5 48.Nc4 Bb4 49.Ra8= Averbach/Petrosian) 45...Ka3 46.Nc5 Rc6 47.Rb3+ Ka2 48.Rb5 Bb4 49.Rxb4 Rxc5 50.Rb6 Rc3+ 51.Ke2 Rc2+µ Korchnoi 52.Ke1 (52.Kf3 Rb2) 52...Rb2 53.Rxf6 Kb3 54.Re6 Kc3 55.Rxe5 Kd3 (55...Rb1+! 56.Ke2 d3+ 57.Kf3 d2 58.Rc5+ Kb4–+ PS) 56.Kf1 Rb1+ 57.Kg2 Ke2–+ Matanovic] 43...Kxa6 44.Rb1 Rc7 45.Rb2 [45.f3 Korchnoi] 45...Be1 46.f3? [46.Rb1! Bxf2 47.Rf1 Be3 48.Rxf6+ Ka7 a) 48...Kb5 49.Re6 Ra7 (49...Rc5 50.h3 Kb4 51.Rb6+=) 50.Rxe5+ Kb4 51.Nxd4 Ra3+ 52.Ke2 Bxd4 53.Rxg5= Averbach/Petrosian/Korchnoi; b) 48...Ka5!? 49.Re6 Rc5µ Matanovic; c) 48...Kb7 49.Re6 Rc5 50.Re7+ Kc6 51.Rxh7 Ra5µ Vitolinsh; 49.Re6 Rc5µ Henkin 50.Re7+ Kb6 51.Re6+ Kc7 52.Rh6 Rb5 53.Kc2= Averbach/Petrosian] 46...Ka5 47.Rc2 Rb7 48.Ra2+ Kb5 49.Rb2+ Bb4 50.Ra2 Rc7 51.Ra1 Rc8! 52.Ra7 [¹52.Ra2 Korchnoi 52...h5 (¹52...Be1 53.Rb2+ Ka4 54.Rc2µ Averbach/Petrosian; 52...Be7 Korchnoi; 52...Bf8 Korchnoi; 52...Bc3? 53.Rc2) 53.gxh5 Rh8 (53...Be1 54.Rb2+ Ka4 55.Rb6± Vitolinsh) 54.Ng3 Be1 …¥g3, ¦h5–+ 55.Nf5 (55.Rb2+! Kc6 56.Rc2+ Kd7 57.Ra2 Bxg3 58.Ra7+= Averbach/Petrosian) 55...Rxh5 56.Nd6+ Kb6 57.Ne8 Rh3–+ Shamkovich] 52...Ba5! 53.Rd7 [53.Rxh7 Bb4–+ …¢a4,¢b3,¦a8 Matanovic(53...Bb6 54.Rf7 Ra8 55.Rxf6 Ra3+ 56.Kd2 Ba5+–+ Shamkovich) ] 53...Bb6 54.Rd5+ Bc5 55.Nc1 Ka4 56.Rd7 Time: 3:27 56...Bb4 Time: 3:25 57.Ne2 Kb3 58.Rb7 Ra8 59.Rxh7 [59.Nc1+ Kb2 60.Rxb4+ Kxc1–+ Shamkovich] 59...Ra1 …¦d1# 60.Nxd4+ [60.Ng3 Ra2 (60...Rd1+ 61.Ke2 Re1+ 62.Kf2 d3–+ Matanovic) 61.Nf1 Rf2–+ Vitolinsh] 60...exd4 61.Kxd4 Rd1+ 62.Ke3 Bc5+ 63.Ke2 Rh1 64.h4 Time: 3:57 64...Kc4! Time: 3:50 [64...gxh4 65.f4„ Matanovic] 65.h5 Rh2+ 66.Ke1 Kd3 0–1

[rlsuth]

Can Any Engine find 42. F4

No, because it's a bad line.

42. f4? gf 43. g5 fg 44. Nf3 Rxa6!

[PauloSoare]

Can Any Engine find 42. F4

No, because it's a bad line.

42. f4? gf 43. g5 fg 44. Nf3 Rxa6!

After analyse with Zappa Mexico II several lines, I think
it´s a draw after 42. f4.
After Rxa6 RxR, blacks don´t get promote any pawn,
because white king don´t alow that black king play.
I didn´t analise 43.g5, but 43. h4.

Paulo Soares

[Ampzilla]

F4 Draws (Kasparov) Plus Other Grandmaster's

[Mish]

New game
8/r6p/P7/1k2p1p1/3pPp2/2bK1N2/R6P/8 b - - 0 1

Analysis by Rybka 2.3.2 mp :

3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.Nf4 Rxa6 8.Rxa6 Kxa6 9.Nxh5 Bh4 10.Nf4
-+ (-1.90) Depth: 21 00:00:00 0kN
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.Nf4 Rxa6 8.Rxa6 Kxa6 9.Nxh5 Bh4 10.Nf4
-+ (-1.90) Depth: 22 00:00:00 0kN
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.Nf4 Rxa6 8.Rxa6 Kxa6 9.Nxh5 Bh4 10.Nf4
-+ (-2.27) Depth: 23 00:00:01 733kN, tb=1
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-2.33) Depth: 24 00:00:24 11249kN, tb=9
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-2.36) Depth: 25 00:00:40 17468kN, tb=20
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-2.36) Depth: 26 00:01:09 28307kN, tb=67
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-2.36) Depth: 27 00:01:51 46279kN, tb=128
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-2.36) Depth: 28 00:03:00 74514kN, tb=312
3...g4 4.Nxe5 h5 5.Ng6 f3 6.e5 Be1 7.e6 f2 8.Ke2 Rxa6 9.Rxa6 d3+ 10.Kf1
-+ (-1.46) Depth: 29 00:07:10 163mN, tb=1502
3...h5 4.Nxg5 Ba5 5.Nf3 Bc7 6.Rb2+ Kxa6 7.Kc4 Rb7 8.Ra2+ Kb6 9.Rg2 Bb8 10.Rg5
-+ (-1.94) Depth: 29 00:17:25 401mN, tb=3495
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb6 7.h3 h5 8.Nd7+ Kc7 9.Ne5 Bb2 10.Kd3
-+ (-2.47) Depth: 29 00:23:56 595mN, tb=3911
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb7 7.h3 h5 8.Kd3 Kb6 9.Kc4 Ka6 10.Kd3
-+ (-2.85) Depth: 30 00:38:07 1010mN, tb=6205
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb7 7.h3 h5 8.Kd3 Kb6 9.Kc4 Ka6 10.Kd3
-+ (-2.80) Depth: 31 00:43:44 1181mN, tb=7360
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb7 7.h3 h5 8.Kd3 Kb6 9.Kc4 Ka6 10.Kd3
-+ (-2.85) Depth: 32 01:02:41 1761mN, tb=10142
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb7 7.h3 h5 8.Kd3 Kb6 9.Kc4 Ka6 10.Kd3
-+ (-2.85) Depth: 33 01:30:06 2589mN, tb=12936
3...h6 4.Nxe5 Rxa6 5.Rxa6 Kxa6 6.Kc4 Kb7 7.h3 h5 8.Kd3 Kb6 9.Kc4 Ka6 10.Kd3
-+ (-2.85) Depth: 34 02:17:12 4016mN, tb=19567

[Ampzilla]

42.F4 gxf4 43 g5! fxg5 Nf3 Draws

[Ampzilla]

937: Petrosian,T - Fischer,R, Candidates Match final 1971
[d]8/r6p/P7/1k2p1p1/3pPp2/2bK1N2/R6P/8 b - - 0 1

Analysis by Naum 3:

44...Rxa6 45.Rxa6
-+ (-2.00) Depth: 3/3 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4
-+ (-1.42) Depth: 7/7 00:00:00 11kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6
-+ (-1.55) Depth: 7/18 00:00:00 19kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6 48.Rxa6
-+ (-1.45) Depth: 8/17 00:00:00 28kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6 48.Rxa6 Kxa6
-+ (-1.64) Depth: 9/20 00:00:00 47kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6 48.Rxa6 Kxa6 49.Nxh5
-/+ (-1.38) Depth: 10/21 00:00:00 71kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6 48.Rxa6 Kxa6 49.Nxh5 Kb5
-/+ (-1.29) Depth: 11/23 00:00:00 120kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Rxa6 48.Rxa6 Kxa6 49.Nxh5 Kb5 50.e5
-/+ (-1.34) Depth: 12/20 00:00:00 215kN
44...g4 45.Nxe5 h5 46.Ng6 f3 47.Nf4 Ba5 48.Ne6 Rxa6 49.Nxd4+ Kb4 50.h3 gxh3
-/+ (-1.05) Depth: 13/24 00:00:00 396kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3
-+ (-1.76) Depth: 13/32 00:00:02 1436kN, tb=140
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-1.74) Depth: 14/24 00:00:03 1766kN, tb=152
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3 d2
-+ (-1.85) Depth: 15/26 00:00:04 2672kN, tb=209
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3 d2 52.Nxd2
-+ (-1.74) Depth: 16/29 00:00:07 3970kN, tb=339
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3 d2 52.Nxd2 Bxd2
-+ (-1.69) Depth: 17/32 00:00:10 5870kN, tb=645
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3 d2 52.Nxd2 Bxd2 53.Kxf2
-+ (-1.62) Depth: 18/31 00:00:23 12796kN, tb=1816
44...h5 45.Nxe5 Rxa6 46.Rxa6 Kxa6 47.h3 Kb5 48.Ng6 Kc6 49.h4 gxh4 50.Nxf4 Kd6 51.Ke2 Ke5 52.Kf3 Bd2 53.Ng6+
-+ (-1.77) Depth: 18/42 00:00:40 21573kN, tb=3521
44...h5 45.Nxe5 Rxa6 46.Rxa6 Kxa6 47.h3 Kb5 48.Ng6 Kc6 49.Ne5+ Kc7 50.Ke2 Kb6 51.Kd3 Kc5 52.Kc2 Ba5 53.Kd3 Bc7
-+ (-1.78) Depth: 19/35 00:00:54 27489kN, tb=6754
44...h5 45.Nxe5 Rxa6 46.Rxa6 Kxa6 47.h3 Kb5 48.Ke2 Ba5 49.Kd3 Bb6 50.Ng6 Ba7 51.Ne5 Bc5 52.Kd2 Kb6 53.Kd3 Kb7 54.Kc4
-+ (-1.89) Depth: 20/39 00:01:32 45003kN, tb=15787
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Rb7 49.Ra2+ Kb6 50.Rg2 Ra7 51.Rg6+ Kb7 52.Rg7 Ra4+ 53.Kb3 Ra5 54.Kb4 Ra2
-+ (-1.74) Depth: 21/38 00:02:20 70434kN, tb=32261


This is A draw





937: Petrosian,T - Fischer,R, Candidates Match final 1971
8/r6p/P7/1k2p1p1/3pPp2/2bK1N2/R6P/8 b - - 0 1

Analysis by Rybka 2.3.2 mp 32-bit :

44...Rxa6 45.Rxa6 Kxa6 46.Nxg5
-+ (-1.80) Depth: 5 00:00:00
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5
-+ (-1.75) Depth: 7 00:00:00 1kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 Bd8
-+ (-1.72) Depth: 7 00:00:00 2kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5
-+ (-2.20) Depth: 8 00:00:00 4kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2
-+ (-2.46) Depth: 9 00:00:00 7kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1
-+ (-2.18) Depth: 10 00:00:00 10kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Nf6 Be1 49.Ng4 f2 50.Ke2
-+ (-1.90) Depth: 11 00:00:00 13kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3
-+ (-2.27) Depth: 12 00:00:00 22kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-2.35) Depth: 13 00:00:00 36kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-2.39) Depth: 14 00:00:01 58kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-2.22) Depth: 15 00:00:01 79kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-1.98) Depth: 16 00:00:02 118kN
44...Rxa6 45.Rxa6 Kxa6 46.Nxg5 Ba5 47.Nxh7 f3 48.Ng5 f2 49.Ke2 Be1 50.Kf1 d3 51.Nf3
-+ (-1.86) Depth: 17 00:00:04 278kN
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Rb7 49.Ra2+ Kb6 50.Kd5 Rb8 51.Ra1
-+ (-2.04) Depth: 17 00:00:08 865kN
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Rb7 49.Ra2+ Kb6 50.Kd5 Rb8 51.Ra1
-+ (-2.05) Depth: 18 00:00:12 1418kN
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Rb7 49.Ra2+ Kb6 50.Kd5 Rb8 51.Ra1
-+ (-1.90) Depth: 19 00:00:19 2121kN, tb=1
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Ra8 49.Rg2 Rc8 50.Kd5 Rd8+ 51.Kc4
-+ (-1.90) Depth: 20 00:00:28 3134kN, tb=1
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Ra8 49.Rg2 Rc8 50.Kd5 Rd8+ 51.Kc4
-+ (-1.90) Depth: 21 00:00:45 4997kN, tb=2
44...h5 45.Nxg5 Ba5 46.Nf3 Bc7 47.Rb2+ Kxa6 48.Kc4 Ra8 49.Rg2 Rc8 50.Kd5 Rd8+ 51.Kc4
-+ (-1.90) Depth: 22 00:01:12 7834kN, tb=3