Triangle maneuver

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The triangle maneuver is a common motif in chess endings .

In pawn endings in particular, there are positions in which it is beneficial to lose a tempo . This means that the player whose turn it is brings about the same position, but in such a way that it is the opponent's turn. This is useful if the opponent is forced to act and therefore has to give up the kings ' opposition, which is often important in a pawn ending, for example .

In the triangle maneuver, the king of the stronger party typically makes three moves to return to his starting square - his path thus describes a triangle. Meanwhile, due to certain circumstances of the position, the opposing king reaches the starting square after two moves, and it is then his party's turn.

Also possible, but triangular maneuvers of the lady , the tower and the runner are rare . In these cases, the figure path during the maneuver need not necessarily be a triangle. Knights and pawns, on the other hand, are not able to perform a triangular maneuver, because these stones cannot return to their starting square within three moves.

example

  a b c d e f G H  
8th Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 8th
7th Chess --t45.svg Chess pdt45.svg Chess --t45.svg Chess kdt45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 7th
6th Chess --t45.svg Chess plt45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 6th
5 Chess --t45.svg Chess --t45.svg Chess plt45.svg Chess klt45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 5
4th Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 4th
3 Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 3
2 Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 2
1 Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg Chess --t45.svg 1
  a b c d e f G H  
White to move wins

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In this position Black has the opposition and thus prevents the white king from advancing further. Wanted white through 1. c6 +? win immediately, could Black with 1.… Kc8! hold a draw. However, White can perform a triangle maneuver on the squares d5, e5 and d4 in order to pass the obligation to move on to Black:

1. Ke5 Kc6 (after 1.… Ke7 wins 2. c6)
2. Kd4 Kd7
3. Kd5 Now the starting position is reached again, but this time it is Black to move.
3.… Kd8
4. Kd6 Kc8
5. Ke7 Kb8
6. Kd7 Ka8
7. c6 bxc6
8. Kc7 c5
9. b7 + and mate in two moves

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