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Joaquim Manuel Durao vs Lodewijk Prins
Malaga (1954), Malaga ESP, rd 2, Feb-02
Italian Game: Two Knights Defense. Polerio Defense Bogoljubow Variation (C58)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Jun-11-06
Premium Chessgames Member
  wwall: 10.b4 was first played by Bogolyubov against Euwe in 1941.

If 10...Bxb4, perhaps 11.a4 O-O 12.Ba3.

If 13...Nxa1, perhaps 14.Rc1 Bc5 (14...Kd8 15.Nxf7+ wins) 15.Rxc5 O-O 16.Bxa1 Qf5 17.d3 Qxd3 18.Rc1

Perhaps 15...Nd5 16.Qxe5+ Kd8 17.Qb8

If 17...Nxa1, then 18.Rc7 Nd7 19.Qxg7 Rf8 20.Rxb7 Bxb7 21.Nxh7. If 17...Qc6, perhaps 18.Nxc2 bxc2 19.Ba3 Be6 20.Nxe6 fxe6 21.Bxe7 Kxe7 22.Qc3 Qxc3 23.dxc3 Rc8 24.Rxc2.

If 19...Re8, perhaps 20.Rc7 Bc5 21.Rxb7 Rxe5 22.Rc7 Rxg5 23.Rxc8+ Bf8 24.Bxf6 gxf6 25.d4.

If 20...Qxe4, perhaps 21.Qxe4 Nxe4 22.Rxc8 Nxd2 23.Re1 Be7 24.Rxf8+ Bxf8 25.Re8. Or, 20...Bd7 21.Nc5 Qc6 22.Rac1.

21...Bb7 loses quickly. If 21...Ne8, perhaps 22.Nd6 Bf6 23.Rxc8 Bxe5 24.Rxa8 Bxd6 25.Rd3 Nf6 26.Rxf8+ Bxf8 27.Rd8. If 21...Qxe4 22.Rxc8 Qg4 23.Rc1 Re8 24.Qb5.

If 22...Kh8, then 23.Nxh7 Bf6 24.Rh3! Bxe5 25.Nf6 mate.

After 23.Qxf6, then 23...gxf6 24.Rg3+ Kh8 25.Bxf6 mate.

May-14-19
Premium Chessgames Member
  fredthebear: 23...gxQf6 leads to Morphy's Mate in true form by accepting the queen sacrifice to crack the g-file, then check by the rook, followed by checkmate with the bishop on the long diagonal (as listed by wwall in the last line). Morphy's Mate is always given by the bishop (while Pillsbury's Mate is given by the second rook).

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