Triangulation refers to a King maneuver which aims to lose a tempo, and leave the opponent with the move. (Dvoretsky) The d5 and d7 square are in correspondence. White in this position can easily “lose” a tempo and place his opponent in zugzwang.

Triangulation Position 1

1.Ke5! Kc6 2.Kd4 Kd7 3.Kd5 White has acheived his aim, by creating a triange with his King. We are now back to the starting position, except that White now has the opposition and it is Black’s turn to move, and the rest is a matter of technique. 3…Kc8 4.Ke6! Attaining the diagonal opposition. 4…Kd8 5.Kd6 Attaining the vertical opposition. 5…Kc8 6.Ke7 Kb8 7.Kd7 Ka8 8.c6+-

Triangulation Posiiton 2
Position after White’s 8th move.

The game would continue as follows: bxc6 9.Kc7 c5 10.b7+ Ka7 11.b8Q+.

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