(04.04.2015) Хубава триходовка от Ladislav Salai jr.

1...Kd5 2.Be5 ~ 3.Rc5#

    1.Se5! (1...Kd5 tr. 2.Rd7+ Kc5 3.Be7#)

1...b4 2.Sdxc4+ A Kd5 3.dxe4# B

1...Be8 2.Sxe4+ C Kd5 3.dxc4# D

1...Qh4 2.dxe4 B (2.dxc4? Qxf6!) 2...~, Rxd2 3.Sdxc4 A, Rxd2#

1...Qh7 2.dxc4 D (2.dxe4? Qxc7!) 2...~, Rxd2 3.Sxe4 C, Rxd2#.

Reciprocal exchange of 2nd and 3rd white moves and 4x double checks. Antidual. (Author)