The Jerusalem Post - The Jerusalem Post Magazine - - GAMES - By Leonard Barden

Dmitry Kryakvin v Ev­geni Kuli­jin, Rus­sian team cham­pi­onship 2008. Ex­perts like to make sac­ri­fi­cial at­tacks lead­ing to check­mate, and when this hap­pens there is of­ten a crit­i­cal moment when only a pre­cise se­lec­tion can prove that the at­tack is sound. Here White (to play) has sac­ri­ficed a rook, and he now faces a plau­si­ble mul­ti­ple choice. Should he go Nxf6+, Bxf6, Rxd1, Qg3, Qh4 or Qh6? All look in­ter­est­ing, but com­puter anal­y­sis shows that only one of them con­vinc­ingly works. Ex­act cal­cu­la­tion is needed, yet the de­cider is based on a check­mat­ing pat­tern which of­ten oc­curs in prac­ti­cal play and which any strong or im­prov­ing am­a­teur needs to know. Can you spot the right win­ning move?

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