3. Be7!

Winning a tempo in a comparison to the alternative variation 3.Rxf8+ Kxf8 4.Bd8;
the black king is still on g8.

3. Rxd8
4. Bxd8

Now WHITE threatens to capture on b6! If BLACK captures back on b6, the a-pawn promotes easily.

4… Ba5

Now it is getting obvious why 2…Bc3 was a necessity. However, WHITE still wins.

5.Bc7 Kf7
6.Bb8 Ke7
7.Bxa7 Kd7
8.Bb8 Kc8
9.Be5

Now the black king is tied to the prevention of the a-pawn's promotion. He can not leave the c8 square or a6-a7 will win immediately for WHITE.

The black bishop can not do much either and the white king is able to traverse the board and attack the weak b6-pawn with Kc6 and Bc7. Note that he does not count any variations, just mentally positions his pieces. Also note that he needs not hurry up.

 It is always good practice to strengthen one's position, if possible, before actually performing the plan. Accordingly, WHITE should first play g3-g4 and h2-h3, ensuring white squares for his pawns (just in case), and then proceed to place his king on c6. Bc7 follows and the b6-pawn will be captured, the c5-pawn coming next.

The three free white pawns are easy to promote. Indeed, some of the moves made are not necessary, but this example illustrates how one should organize his thoughts.

THE END...............

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