Not too hard, but very elegant – Ellison 1969 (Understand this and you will have learnt something about Pawn endings!). White to play – What is the result with best play?
Wallace – Ellison 1969 is a splendid example of king manoeuvrings which should be in all the textbooks. White starts by advancing on the Q-side, 1. Kb2 Kd6, but an immediate 2 Kb3 would allow 2…Kc5 and it is Black who will win. White must proceed indirectly: 2 Ka3! Black must still play 2…Kc5 to prevent a further advance, and now 3 Kb3 pushes him back. If 3…Kd6 then 4 Kb4 and the Black c-pawn will soon fall, hence 3…Kb6 (see 9a), and White will get no further on the Q-side (4 Kb4 c5+). But by pushing Black back to b6, White has gained room to advance in the centre: 4 Kc2 Kc5 5 Kd3 Kd6 6 Ke4 (see 9b), Can Black ignore the threat to his g-pawn and play 6.-.Kc5? No, he will be one move too late (? Kf5 Kxc48 Kxg5 Kxc3 9 Kxf4 K” 10-12 g7 c3 13 g8Q). So Black must play 6…Ke6, and White can advance his
leading c-pawn: 7 c5. The Black g-pawn is still threatened, hence 7…Kf6, and now White goes back to the Q-side: 8 Kd4 Ke6 9 Kc4 (see 9c below). If Black now tries 9..,Ke5, hoping for l0 Kb4 Kd5, there will follow l0 Kb3! Kd5 l1 Kb4 (or 10,..Kc6 11 Ka4) and While will soon turn Black’s position. To keep him out, Black must play 9…Kd7, and 10 Kb4 Kc7 l1 Ka5 Kb7 12 c4 Ka7 gives 9d. Now Black’s g-pawn is doomed, hut after 13 Kb4 Ka6! 14 Kc3 Ka5 he has one last throw (see 9e): an immediate 15 Kd4 allows the counterattack 15…Kb4 16 Ke5 Kxc5 17 Kf5 Kd4! 18 Kxg5 Ke3 19 K~ Kxf3 20 95 Ke3 2l-23 g8Q flQ, and both sides have promoted. White must make yet another Q-side probe to gain a tempo, 15 Kb3! Ka6 16 Kb4! Kb7 17 Kc3. and at last Black is left without resource.