Mutually exclusive tempo

Two consecutive clear zugzwang situations but obviously only one tempo move, but it is impossible to determine which one.

See also: Tempo move.

Abdurahmanović, Fadil

Klasinc Marco

The Problemist, 2017

Example: Mutually exclusive tempo
h#2*  (6+6)

1...Bxe5 2.f4 Bf5#

1.Kxf4 Kd5 2.e4 Se6#

W1 & B2 - mutually exlusive tempo moves.

View in Helpmate Analyzer

FEN: 8/8/3K4/4pp2/3NkB2/2p1p1pB/2P3P1/8

External links:

de Mattos Vieira, Ricardo

SuperProblem TT-212, 2018

Spec. Prize

Example: Mutually exclusive tempo
h#4  (7+14)

1.e6 f5 2.Kg5 h4+ 3.Bxh4 g3 4.Sxg3 Bxe3#

W3 & B4 - mutually exlusive tempo moves.

View in Helpmate Analyzer

FEN: 8/4p3/8/4P2p/4PPpk/3pp1bP/pp2pBP1/rrn1K2n

External links:

Kovacevic, Marjan

British Chess Magazine, 1986

1st Prize

Example: Mutually exclusive tempo
h#2  (4+6)

1.Qh8 0-0 2.Qa1 Bxf7#

B1 & B2 - mutually exlusive tempo moves.

View in Helpmate Analyzer

FEN: 6B1/5n1n/8/8/N7/b7/kq5r/4K2R

External links:

Macleod, Norman Alasdair

Schwarzkopf, Bernd

feenschach, 1990

Example: Mutually exclusive tempo
h#2  (6+6)

1.d6 Se8 2.Bc7 Sa7#

B1 & W1 - mutually exlusive tempo moves
W1 & B2 - mutually exlusive tempo moves

View in Helpmate Analyzer

FEN: K2b4/2Npp3/Ppk1P3/1N1p4/3P4/8/8/8

External links: