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Daily chess puzzle: Check Mate #183

December 11, 2016
Another puzzle from Dragoslav Andric’s 1981 book “Matni Udar”.
White to play and mate Black
1831
Bonč-Osmolovski v Baranov, Moscow 1953
Solution
You immediately ‘know’ that the solution is 1 Qd8+!, but how to win after 1…Kd8? It isn’t too hard to dismiss 2 Nc6+, so 2 Ne6+ Ke7 and then what?
1832
After some thought I found the solution: 3 Bg5+ f6[] 4 Nd8+! and mates; the Nd8+ move is unusual.   My engine tells me that 3 Nc7 also wins, though does not mate.
1833
If Black plays instead 2…Ne8 then 3 Nc7+ Ke7[] 4 Bg5 mate.
My engine also tells me that 1 Ne6 wins easily, too, as is ‘obvious’ by inspection: but it is less forcing (though mate in 13, apparently).
FEN
4kb1r/pp3ppp/q3b3/6Q1/1n1N4/4B3/PPP2PPP/2KRR3 w k – 0 1
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