How to Build an Attack in the Benoni?

The ETCC in Reykjavik saw more than one amazing game. The attack that Pavel Eljanov created in round eight against Grzegorz Gajewski can be a good rival of Tomashevsky's jewel.

In a typical Benoni-type of position the Ukrainian GM managed to open the center and the king's flank before finishing the game with a brilliant sacrifice.