Nº5 Michael Pasman

Win

Section B.1.

Michael Pasman (Israel)

wKh6,Nb7,Rg7/bKh1,Nb5,Pa3,f5

1.Rd7! Need to force Black’s Nc3 move,
1.Re7? f4=
1.Rf7? a2–+
Logical try : 1.Nc5? a2! (1…f4 2.Rd7+-) 2.Nb3 f4! 3.Rd7 f3!= White is missing an important tempo

1…Nc3
1…f4 2.Nc5 Nc3 3.Rf7 main

2.Nc5!
Try : 2.Na5? f4 3.Rf7! Ne2! 4.Nb3 Kg2 5.Kg5 f3=

2…a2
2…f4 3.Rf7+-

3.Nb3
3.Ra7? f4 4.Kg5 f3 5.Nd3 Kg1 /g2=

3…f4 4.Rf7! Compared to logical try , knight is standing worse on c3, and Black has to lose a tempo for Nd4

4…Ne2 5.Kg5! f3!
5…Nd4 6.Na1! f3 7.Kf4! Kg2 8.Ke3+-
5…Kg2 6.Ra7! f3 7.Rxa2 f2 8.Rxe2 and Nd2

6.Kg4!
Thematic try : 6.Rxf3 Nd4! 7.Rf1+ Kg2 8.Ra1 Nxb3 9.Rxa2+ Kf1 /g1=

6…Nd4!
6…Kg2 7.Rxf3 Nd4 8.Rg3+ Kf2 9.Na1+-

7.Kg3!! White has extra tempo for this move
7.Na1 Kg2=

With two lines :

a) 7…Kg1 8.Nxd4!
8.Na1 Kf1!=

8…a1Q 9.Nxf3+ Kf1 10.Nd4+ Kg1 11.Ne2+ Kh1 12.Rh7#

b) 7…Nxb3 8.Kf2! a1Q 9.Rh7# Twin mate to a main line