13...a4! is very interesting one! What if 14.Qa3?
Sacrificing against Computer4-IMPOSSIBLE
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Did you lose the match on purpose? Because you played very well from the beginning, but missed the mate in 1 at the end? Just wondering. However, you must be brave to sac again IMPOSSIBLE! ;)
There's my game. It was a 5|0 blitz, so I wasn't able to calculate much more than 2 moves ahead. I also played this game at 1:30am, what should be an excuse for the stupid blunders, but still... However, I like it very much. A sacrificed a couple of pawns (successfully or not).
I would be glad if you take a look at this game, find any alternatives or suggestion. Thank you!