Nº4 Harrie Grondijs

Win

Harrie Grondijs (Netherlands)

wKa5,Nd4,Bb4,Pc6,d7/bKb2,Rd8,Pa2,a6,c2

1.Ba3+!
1.Nxc2? Kxc2 2.Kb6 a1Q 3.Kc7 Rg8–+
1.Bc3+? Kxc3 2.Nxc2 Kxc2–+ 3.c7 a1Q+–+

1…Kxa3 2.Nxc2+ Kb2 {best, clears 3rd row for defensive 5th move 3.c7 Rxd7 4.c8Q Rd3 5.Na1! thematic move
5.Qe6? Ra3+ 6.Kb4 a5+ 7.Kb5 Kxc2=
5.Qg8? Ra3+ 6.Kb6 Kxc2=

5…Rc3
5…Ra3+ 6.Kb4 Kxa1? 7.Qc1#

6.Qh8! thematic move creates Zugzwang 6…Kxa1 7.Qxc3+ win – {with White/^s King starting from a6 this would be a drawn position, now it is a standard win e.g.: 7…Kb1 8.Qb3+ Ka1 9.Kb4 a5+ 10.Ka3+-