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Daily chess puzzle

August 31, 2016

A break for a day from my series of postings from Matni Udar.

 

One of my habits is to cut and keep cuttings of problems that I can't solve. A treasure chest for a later day. Some I keep in a filing cabinet, a few I keep in the pocket of my Kindle case. Why do I mention this? I am posting this blog whilst on holiday in Turkey, and was reading a book on my Kindle, but at times dipped into my cache of problems. Some turn out to be trite, and I wonder why I missed the solution first time round, others stump me for a while long, and these I will post on my blog. This is one of them.

 

Today's is really tough, at the limit of my ability: I wonder now long Peter Svidler took to see the win?

 

White to play and win

Svidler v Samhouri, Tromsø Olympiad, 2014

Puzzle seen in Chess magazine, October 2014

 

Solution

 

So, I knew it would be a capture, and I knew it would be the win of the d pawn, but which order of moves? And after several of the moves, Black has several alternatives.

Intuitively I felt that 1 Nd5! had to be the move, but I couldn't make it work, all the exchanges were too much for me. But I looked at the normal alternatives, and dafter ones like 1 Bh6? and 1 Re7?, to no avail, so looked again at 1 Nd5! and eventually saw the path. 1…Nd5 2 Nc6! bc[] 3 Be7! Ne7[] 4 Qd8 exchanging the defender of the Ne7, which is now a LPDO, so 4….Rd8[] 5 Re7 and White is a healthy pawn up.

In the end position, Black can't play 5…Rd2 due to 6 Re8+ Kh7[] 7 Bc6 Rb8[] 8 Be4+ g6[] (8…f5 9 Bf5+ and the Bf5 is pinned to the LPDO Rb8) 9 b3 and White is two pawns up, 1-0.

Earlier, if after 1 Nd5 Black plays 1…hg then 2 Nc6 and 3 Ne7+ wins. And 1…Nd4 2 Ne7+ also nets the pawn.

 

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