99756

Julia Vysotska

Best Problems - 2012, No.63 (Jul 3/2012), #2927
FEF: *6xHbxpOqvsytdKg1CRro3Fuj6HCGc7Jj4hCv9jY2a
 
7+10
hs#3
b) pc4->d3
Andernach
Pao a5, h8, a1; Nightrider c8; Vao h1
a) 

  1.PAa5-a6 Nc8-e4   2.Rf3-f5 Ne4*a6=wN +   3.Rf5-d5 + Bg8*d5=wB # 

b) wPc4-->d3

  1.PAa5-a2 Bg8-d5   2.Rf3-e3 Bd5*a2=wB +   3.Re3-e4 + Nc8*e4=wN # 

--
Sacrifices of white PAO (on a2/a6) with the goal: Annihilation + change of color of the black B and N.

Unpins of white Rf3 with Ne4/Bd5;
black half-battery play N-B/PAO;
creation of black batteries N/VAO and B/VAO.

Model mates after three white pins 
(2 active and one passive).












Entered by:
Julia Vysotska