L’épine en h3 – Leçons vidéos et Cours d'échecs

Une épine aux échecs est un pion à proximité du roi (en général h3/f3 ou f6/h6). Cette épine permet de nombreux motifs avec un mat potentiel en g7 (g2); Mat de Lolli. D’un point de vue défensif, il vaut mieux éviter cette avancée dangereuse.
Trait aux Noirs
1…Tf1 #
Cliquez sur les …pour accéder aux positions d’illustration
   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 23"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/kp6/p1p2Q2/2P5/6pp/3pP1Pq/P2r1P1P/5RKR b - - 0 1"]  [PlyCount "5"]  [SourceDate "2015.08.31"]   1... Qxf1+ 2. Kxf1 Rd1+ 3. Kg2 h3# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 22"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "2k5/pp3p2/2p5/8/4NP2/P5Pp/1P4rP/7K b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Re2 2. Kg1 (2. Ng5 Re1#) 2... Rxe4 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 21"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "6k1/8/8/2B5/6q1/7p/7P/1R3rRK b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Qg2# (1... Rxb1) 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 20"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "5rk1/8/8/8/6q1/7p/7P/6RK b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Rf1 2. Rxf1 Qg2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 19"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "1k4q1/1pp2P2/p3P3/8/3B4/1N3P1p/7P/R1r3RK b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Qg2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 18"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/kpp2P2/p1r5/7B/8/5PBp/4q2P/6RK b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Rc1 2. Rxc1 (2. f8=Q Qg2#) 2... Qg2# 0-1   [Event "Nat IV"]  [Site "Digne"]  [Date "2005.12.03"]  [Round ""]  [White "Rosso"]  [Black "Puglisi"]  [Result "1-0"]  [ECO "A40"]  [WhiteElo "1949"]  [BlackElo "2050"]  [SetUp "1"]  [FEN "3R4/3p2k1/1p1Bp1q1/1P1n1p2/3P1P2/6rp/7P/3Q3K b - - 0 43"]  [PlyCount "5"]  [EventDate "2005.01.16"]  [EventRounds "3"]  [SourceDate "2015.08.31"]   43... Rd3 $1 44. Qe2 (44. Qg1 Rd1 $1) (44. Qf1 Rd1 $1) (44. Rxd7+ Ne7 $1 45.  Rxe7+ Kh6) (44. Qxd3 Qg2#) 44... Rd1+ 45. Qxd1 Qg2# 1-0   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 17"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "6k1/6q1/8/8/8/7p/6rP/5R1K b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Rxh2+ 2. Kxh2 Qg2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 16"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/6q1/8/5n2/5p1p/5P1P/5RRK b - - 0 1"]  [PlyCount "5"]  [SourceDate "2015.08.31"]   1... Qg2+ 2. Rxg2+ fxg2+ (2... hxg2+ 3. Kg1 Nh3# (3... Ne2#)) 3. Kg1 Ne2# 0-1   [Event ""]  [Site ""]  [Date "2018.11.24"]  [Round ""]  [White "Position 15"]  [Black "]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/6q1/8/5n1n/5B1p/4PP1P/5R1K b - - 0 1"]  [PlyCount "5"]  [SourceDate "2015.08.31"]   1... Qg2+ 2. Bxg2 hxg2+ 3. Kg1 Nh3# (3... Nxe2#) 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 14"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/8/8/5n2/7p/5P1P/5RKB b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Ne2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 12"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/8/8/6qp/8/5PPP/5RK1 b - - 0 0"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... h3 2. g3 Qf3 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 12"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/8/8/6qp/8/5PPP/5RK1 b - - 0 0"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... h3 2. g3 Qf3 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 10"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/7k/8/8/6b1/6Pp/5p1P/5N1K b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Bf3# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 10"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/7k/8/8/6b1/6Pp/5p1P/5N1K b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Bf3# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 9"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "2k5/ppp5/8/4B1p1/6Pn/4Nn1p/2q4P/R6K b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Qg2+ 2. Nxg2 hxg2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 8"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/8/6p1/2B3bk/4P3/3Q1KPp/q6P/8 b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Qg2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 7"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "6k1/5pp1/R6p/8/4b1n1/5pPp/1Q3q1P/2R4K b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Qf1+ (1... Qg2+ 2. Qxg2 hxg2+ 3. Kg1 f2#) (1... Qxh2+ 2. Qxh2 f2+ 3. Qg2  hxg2# (3... Bxg2#)) 2. Rxf1 f2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 6"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/5pk1/6p1/8/4p1n1/4P1Pp/5r1P/R4NNK b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Rxh2+ 2. Nxh2 Nf2# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 5"]  [Black "?"]  [Result "0-1"]  [SetUp "1"]  [FEN "8/2k4b/5p2/3p2pp/4P3/4BKPp/4PP1P/8 b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Bxe4# (1... dxe4#) 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 4"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/1r4k1/8/8/8/6Pp/4PP1P/1r3RK1 b - - 0 2"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   2... Rxf1+ 3. Kxf1 Rb1# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 3"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/1r6/1r6/8/6Pp/5P1P/R5K1 b - - 0 1"]  [PlyCount "3"]  [SourceDate "2015.08.31"]   1... Rb1+ 2. Rxb1 Rxb1# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 2"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/1r6/8/8/6Pp/5P1P/6K1 b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Rb1# 0-1   [Event ""]  [Site ""]  [Date ""]  [Round ""]  [White "Position 1"]  [Black ""]  [Result "0-1"]  [SetUp "1"]  [FEN "8/6k1/2q5/8/8/6Pp/5P1P/6K1 b - - 0 1"]  [PlyCount "1"]  [SourceDate "2015.08.31"]   1... Qg2# (1... Qc1#) 0-1   [Event "Wch U20 fin-C"]  [Site "Athens"]  [Date "1971.08.09"]  [Round "8"]  [White "Buscio, Jorge"]  [Black "Rosenberg, Michael"]  [Result "0-1"]  [ECO "A16"]  [SetUp "1"]  [FEN "3r1k2/Bp2r1b1/5pp1/3q4/1Q1R4/P2P2Pp/1P3P1P/6K1 b - - 0 34"]  [PlyCount "1"]  [EventDate "1971.08.02"]  [EventType "tourn"]  [EventRounds "11"]  [EventCountry "GRE"]  [Source "ChessBase"]  [SourceDate "1998.11.10"]   34... Qg2# 0-1   [Event "URS-ch35"]  [Site "Kharkov"]  [Date "1967."]  [Round ""]  [White "Kirilov, Valentins"]  [Black "Korensky, Valeri S"]  [Result "0-1"]  [ECO "A28"]  [SetUp "1"]  [FEN "5r1k/1pp3p1/2n5/p3pr2/P3N2p/2BPbqP1/1PQ2P1P/3R1RK1 b - - 0 29"]  [PlyCount "1"]  [EventDate "1967."]  [Source "ChessBase"]  [SourceDate "1999.07.01"]  [WhiteTeamCountry "ISR"]  [BlackTeamCountry "CSR"]   29... h3 0-1   [Event "Paris it"]  [Site "Paris"]  [Date "1860."]  [Round ""]  [White "Laroche"]  [Black "Anderssen, Adolf"]  [Result "0-1"]  [ECO "C54"]  [SetUp "1"]  [FEN "2r5/p3Pk1p/6q1/3PQ3/8/6Pp/PP3P1P/5K2 b - - 0 30"]  [PlyCount "1"]  [EventDate "1860"]  [Source "ChessBase"]  [SourceDate "1998.11.10"]   30... Qd3+ 0-1   [Event "Berlin m3"]  [Site "Berlin"]  [Date "1864."]  [Round "5"]  [White "Paulsen, Louis"]  [Black "Neumann, Gustav Richard"]  [Result "0-1"]  [ECO "B24"]  [SetUp "1"]  [FEN "2Rr4/pp2k1p1/5p2/1q2pPn1/1P1nP3/6Pp/PQ3N1P/3R2KB b - - 0 28"]  [PlyCount "7"]  [EventDate "1864."]  [Source "ChessBase"]  [SourceDate "2001.11.25"]   28... Ndf3+ 29. Bxf3 Nxf3+ 30. Kh1 Rxd1+ 31. Nxd1 Qf1# 0-1   [Event "Paris m1"]  [Site "Paris"]  [Date "1905."]  [Round "3"]  [White "Taubenhaus, Jean"]  [Black "Janowski, Dawid Markelowicz"]  [Result "0-1"]  [ECO "C79"]  [SetUp "1"]  [FEN "2k1r1r1/1pp2p2/p2p3b/3PnP2/PPP5/1BR3Pp/5P1P/3R2K1 b - - 0 28"]  [PlyCount "7"]  [EventDate "1905."]  [Source "ChessBase"]  [SourceDate "1999.07.01"]   28... Bd2 29. Rc2 Nf3+ 30. Kh1 Re2 31. Rf1 Rge8 0-1   [Event "Ostend-B"]  [Site "Ostend"]  [Date "1907."]  [Round "9"]  [White "Cohn, Wilhelm"]  [Black "Tartakower, Saviely"]  [Result "0-1"]  [ECO "B01"]  [SetUp "1"]  [FEN "4r3/p1pk2p1/3b4/4np2/8/6Pp/P2q1P1P/1r1NRRKQ b - - 0 27"]  [PlyCount "3"]  [EventDate "1907."]  [EventType "tourn"]  [EventRounds "28"]  [EventCountry "BEL"]  [Source "ChessBase"]  [SourceDate "1999.07.01"]   27... Qxe1 {Ab} 28. Rxe1 Nf3+ 0-1   [Event "NED-chT 2223"]  [Site "Netherlands"]  [Date "1923.04.15"]  [Round "5.5"]  [White "Kersten, JL."]  [Black "Haalebos, FC."]  [Result "0-1"]  [ECO "A53"]  [SetUp "1"]  [FEN "3r1b2/pp4k1/7p/2p2P2/2P5/1P3PPp/Pq3R1P/4Q2K b - - 0 30"]  [PlyCount "1"]  [EventDate "1922.12.03"]  [EventType "team-"]  [EventRounds "5"]  [EventCountry "NED"]  [Source "ChessBase"]  [SourceDate "2012.11.22"]  [WhiteTeam "Amsterdam VAS"]  [BlackTeam "Rotterdam NRSV"]  [WhiteTeamCountry "NED"]  [BlackTeamCountry "NED"]   30... Qxf2 0-1   [Event "Paris"]  [Site "Paris"]  [Date "1925"]  [Round "10"]  [White "Opocensky, Karel"]  [Black "Alekhine, Alexander"]  [Result "0-1"]  [ECO "C01"]  [SetUp "1"]  [FEN "1k1n3r/1pp5/p4p2/3p1qp1/PP1P4/2P2NPp/4QP1P/4R2K b - - 0 25"]  [PlyCount "1"]  [EventDate "1925"]  [Source "ChessBase"]  [SourceDate "1999.07.01"]  [WhiteTeamCountry "NED"]  [BlackTeamCountry "NED"]   25... Re8 0-1   [Event "Hastings 2526"]  [Site "Hastings"]  [Date "1925.12.30"]  [Round "3"]  [White "Colle, Edgar"]  [Black "Alekhine, Alexander"]  [Result "0-1"]  [ECO "D38"]  [SetUp "1"]  [FEN "3r2k1/1ppn1pp1/p7/2P5/2pBP3/2Pr1PPp/7P/R5KB b - - 0 29"]  [PlyCount "1"]  [EventDate "1925.12.28"]  [EventType "tourn"]  [EventRounds "9"]  [EventCountry "ENG"]  [Source "ChessBase"]  [SourceDate "2007.11.25"]  [WhiteTeamCountry "NED"]  [BlackTeamCountry "NED"]   29... Nxc5 0-1   [Event "Berlin BSG"]  [Site "Berlin"]  [Date "1928.02.18"]  [Round "12"]  [White "Steiner, Lajos"]  [Black "Schlage, Willi"]  [Result "0-1"]  [ECO "C79"]  [SetUp "1"]  [FEN "4r3/4rk2/4b3/2RpQp2/1Pp2Pq1/6Pp/2P1R2P/6K1 b - f3 0 34"]  [PlyCount "1"]  [EventDate "1928.02.04"]  [EventType "tourn"]  [EventRounds "13"]  [EventCountry "GER"]  [Source "ChessBase"]  [SourceDate "1999.11.16"]   34... Qf3 0-1   [Event "Berlin Freie Vereinigung"]  [Site "Berlin"]  [Date "1928.07.11"]  [Round "3"]  [White "Rellstab, Ludwig Sr"]  [Black "Richter, Kurt Paul"]  [Result "0-1"]  [ECO "A50"]  [SetUp "1"]  [FEN "r4rk1/p5p1/bp1R4/3Pp1qn/1P2P3/2Q3Pp/P2NNP2/4R1K1 b - - 0 24"]  [PlyCount "3"]  [EventDate "1928.07"]  [EventType "tourn"]  [EventRounds "5"]  [EventCountry "GER"]  [Source "ChessBase"]  [SourceDate "2005.11.24"]   24... h2+ {Ab} 25. Kxh2 (25. Kh1 Rxf2) (25. Kg2 Bxe2 26. Rxe2 Nf4+ {gagne})  25... Rxf2+ 0-1   [Event "Bled"]  [Site "Bled"]  [Date "1931.09.10"]  [Round "14"]  [White "Flohr, Salo"]  [Black "Colle, Edgar"]  [Result "0-1"]  [ECO "E34"]  [SetUp "1"]  [FEN "5k2/6p1/8/p7/8/2n1RqPp/P2r1B1P/5QK1 b - - 0 38"]  [PlyCount "5"]  [EventDate "1931.??.??"]  [Source "ChessBase"]  [SourceDate "1999.07.01"]   38... Ne2+ 39. Rxe2 Qxe2 40. Bc5+ Ke8 0-1   [Event "Bad Nauheim"]  [Site "Bad Nauheim"]  [Date "1935."]  [Round "1"]  [White "Engels, Ludwig"]  [Black "Stoltz, Goesta"]  [Result "0-1"]  [ECO "D36"]  [SetUp "1"]  [FEN "3rr1k1/p7/2qP2p1/2p2pQ1/2pnP3/2N3Pp/PP3R1P/7K b - - 0 39"]  [PlyCount "1"]  [EventDate "1935"]  [Source "ChessBase"]  [SourceDate "1999.07.01"]   39... Rxd6 0-1   [Event "EST training"]  [Site "Tallinn"]  [Date "1936."]  [Round ""]  [White "Nedsevedski, G."]  [Black "Keres, Paul"]  [Result "0-1"]  [ECO "C79"]  [SetUp "1"]  [FEN "4rk2/2p2qp1/Q2p4/2pPp3/4b3/2P1NnPp/PP3P1P/3R3K b - - 0 31"]  [PlyCount "3"]  [EventDate "1936"]  [EventType "tourn"]  [EventRounds "10"]  [EventCountry "EST"]  [Source "ChessBase"]  [SourceDate "2000.11.22"]   31... Nd2+ 32. Kg1 Qf3 0-1   [Event "CSR-ch Army"]  [Site "Prague"]  [Date "1955.08.12"]  [Round "8"]  [White "Muehl, Josef"]  [Black "Betak, Miroslav"]  [Result "0-1"]  [ECO "B40"]  [SetUp "1"]  [FEN "5Q2/1pR3p1/p5k1/4r3/3n4/1P2N1Pp/q4P1P/6K1 b - - 0 37"]  [PlyCount "3"]  [EventDate "1955.08.07"]  [EventType "tourn"]  [EventRounds "21"]  [EventCountry "CSR"]  [Source "ChessBase"]  [SourceDate "2002.11.25"]   37... Qb1+ 38. Nf1 Ne2+ 0-1   [Event "WchT U26 07th"]  [Site "Leningrad"]  [Date "1960."]  [Round "10"]  [White "Szabo, Iuliu"]  [Black "Rakic, Tomislav"]  [Result "0-1"]  [ECO "C17"]  [SetUp "1"]  [FEN "r7/5k2/bp2p3/2b1P3/2qp1P1N/P6p/1QPB3P/R3R2K b - - 0 33"]  [PlyCount "3"]  [EventDate "1960.07.15"]  [EventType "team-tourn"]  [EventRounds "15"]  [EventCountry "URS"]  [Source "ChessBase"]  [SourceDate "1999.11.16"]   33... Qd5+ 34. Kg1 Rg8+ 0-1   [Event "WchT U26 11th fin-A"]  [Site "Krakow"]  [Date "1964.07.29"]  [Round "7.2"]  [White "Kagan, Shimon"]  [Black "Kavalek, Lubomir"]  [Result "0-1"]  [ECO "A36"]  [SetUp "1"]  [FEN "4r1k1/R2p1pb1/4nqp1/1p6/1P3P2/2NQP1Pp/1B5P/7K b - f3 0 30"]  [PlyCount "5"]  [EventDate "1964.07.18"]  [EventType "team"]  [EventRounds "11"]  [EventCountry "POL"]  [Source "ChessBase"]  [SourceDate "1999.11.16"]  [WhiteTeam "Israel"]  [BlackTeam "Czechoslovakia"]  [WhiteTeamCountry "ISR"]  [BlackTeamCountry "CSR"]   30... Nxf4 31. exf4 Qxf4 32. Qd2 Qf1# 0-1   [Event "Zinnowitz U20 09th"]  [Site "Zinnowitz"]  [Date "1972.10.03"]  [Round "6"]  [White "Syre, Christian"]  [Black "Heinig, Wolfram"]  [Result "0-1"]  [ECO "A16"]  [SetUp "1"]  [FEN "r6r/1B2pk2/1p2bbp1/1N3p2/8/P3P1Pp/2q2P1P/1R2QKR1 b - - 0 27"]  [PlyCount "1"]  [EventDate "1972.10."]  [EventType "tourn"]  [EventRounds "11"]  [EventCountry "DDR"]  [Source "ChessBase"]  [SourceDate "2009.11.30"]   27... Bc4+ 0-1   [Event "CAN-ch/zt"]  [Site "Toronto"]  [Date "1978."]  [Round "3"]  [White "Berry, Jonathan"]  [Black "Rohland, Michael K"]  [Result "0-1"]  [ECO "A01"]  [WhiteElo "2320"]  [BlackElo "2200"]  [SetUp "1"]  [FEN "r7/1n6/1P1p2k1/p1pP1p2/2P1p1p1/1Rq1P1Pp/Q3BP1P/5K2 b - - 0 50"]  [PlyCount "1"]  [EventDate "1978."]  [Source "ChessBase"]  [SourceDate "1999.07.01"]   50... Qc1+ 0-1   [Event "GBR tour sim"]  [Site "Great Britain"]  [Date "1868."]  [Round ""]  [White "De Vere/MacDonnell"]  [Black "Steinitz/Boden"]  [Result "0-1"]  [ECO "C54"]  [SetUp "1"]  [FEN "3R4/2p2kp1/1p6/1Pn5/7p/P5P1/2r2P1P/6K1 b - - 0 37"]  [PlyCount "13"]  [EventDate "1868."]  [Source "ChessBase"]  [SourceDate "1998.11.10"]   37... h3 38. Kf1 Ne4 39. a4 Rxf2+ 40. Ke1 Rxh2 41. Rd7+ Kg8 42. Rxc7 Nxg3 43.  Rc8+ Kh7 0-1   [Event "SWE-ch op"]  [Site "Vaxjo"]  [Date "1992"]  [Round ""]  [White "Dedorson, Tomas"]  [Black "Greiff, Hakan"]  [Result "0-1"]  [ECO "D36"]  [SetUp "1"]  [FEN "6k1/2r2B2/p1p2R2/3pq3/PP6/1Q2b1Pp/4b2P/5R1K b - - 0 33"]  [PlyCount "1"]  [EventDate "1992."]  [Source "ChessBase"]  [SourceDate "1996.11.15"]   33... Rxf7 0-1