Author: Darren Rushton
Date: 12:45:17 10/19/03
[D] 4K2b/B3P2N/1Q1PP1N1/1R1p3r/1r1pk1B1/6P1/b1P1PP2/n7 w - - 0 1 Y. G. Vladimirov 1st Prize Magadansk Komsomolets 1986 White Mates in 4. In Vladimirov's problem 1.Qc5 threatens 2.Qc3 with mate next move, and Black's main defences consist of Grimshaw interferences on c4. After 1…Rc4 White exploits the interference to sacrifice the queen with 2.Qxd5+ Rxd5. Black has been compelled to open the line, and a knight check 3.Ng5+ draws the rook back along the line to open the white rook guard on f5, releasing the bishop for 4.Bf3 mate. This strategic sequence is matched exactly in the companion variation 1…Bc4 2.Qxd4+ Bxd4 3.Sf6+ Bxf6 4.f3. In the subsidiary variation 1…Rb3 Black abandons the guards on d4 and d5, allowing the Nowotny interference 2.Se5, threatening a pair of queen mates. The rook must return, but after 2…Rb4 a second Nowotny 3.c4 leaves Black helpless.
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