1.b4! Sa2 2.b5! Sc3 3.b6! cb

4.Kf7? Sd5 5.Ke6! Sc7 6.Kd7! Sa6 7.Kc8! b5 8.Kb7! =

But:

4… Sc5! (5.Ke6 Ke2 6.Kd7 Kd3 7.Kc8 Kc4 8.Kb7 Kc5! – black wins)

4.c7! Se5! 5.c8S!! b5 (5.c8Q? Se7+!) 6.Sa7! b4

7.Sc6! b3 8. Sa5! b2 9.Sc4! b1S = =  (9… b1Q 10.Sd2+!)

White-black echo!

1.Kf7? Sd5 2.Ke6! Sc7 3.Kd7! Sa6 4.Kc8! b5 5.Kb7! =

But: 1… Sc5! (2.Ke6 Ke2 3.Kd7 Kd3 4.Kc8 Kc4

5.Kb7 Kc5! – black wins)

White-black echo!

White Excelsior-race and black long echo Excelsior