A move that changed the whole game!

Today I was looking at the chess database on chess.com. And, I happened to bump into this game between Peter Lindborg (2232) Vs Hakan Sevensson (2051). 

On this match, the opening that was played was Queens Gambit Declined: Chigorin, Janowski Variation. Move no. 5 (Nc3) was the last book move. Nxd4 was a mistake, Qxd4 would have been the best move and at this point (Move no. 7) white gained a significant advantage (+2.06). Engine suggests Qxd4 would have been the best move. But we aren't machines right! After that e5 was played which was the critical move and Lindborg found it! Another blunder that happened was on move on 9 when Nc6 was played. Nc6 would have been better as per engine. But, why? Let's see.... Because it stops the pawn on e5 from advancing and it acts as a blockage for the Knight on h5, which is captured after 4 moves by Queen. As per engine Qb5+ is a mistake hey the Knight on h5 is hanging so does it justify saying that move no 12 was a mistake...hmm.... Alternatively, Bb5+ could have been played. Because after Bxd7 then either Qxd7 or Kxd7 had to be played and remarkably if Qxd7 is played the Rook on a8 is hanging and if King takes the Bishop then Queen would have been lost! 

However, Sevensson still played a very nice move Nd7 on move no 12 really prevented the massacre of Rook! After the Knight on h5 was captured by Lindborg, Sevensson must have thought he is lost it and then yet again made another inaccuracy of putting the queen on f6 square. whereas g6 would have been the best response. If g6 would have been played, then the natural move would have been to move the queen to b5 square and maintain the pin-pressure. However, it was played which again turned in favor of white. On move no 16, if the queen had been sacrificed the game would have lasted a bit longer but the significant advantage of white was so high to turn the tables around!

It was a good game which teaches us that our action might not have immediate consequences but in the afterwards it might have bad repercussion!!