7th Winterthur 
Pawn endings from previous Chess Weeks
We present you a series of four pawn endings that arised in previous Chess Weeks. Each of them is arranged as an excercise.
Position 1:
Michèle Britschgi-Zwimpfer — Roman Freuler
Winterthur Chess Week 2006
Black to move wins
Position 2:
WGM Anna Zozulia — Ralph Buss
Winterthur Chess Week 2002
Did black well to exchange minor pieces here with the moves 41... Nd1-e3+ 42. Kc4-b5 Ne3xd5 43. e4xd5 reaching a pawn ending (by the way: in the game followed 43...Kd6xd5 44. Kb5xb6 a5xb4 45.c3xb4 e5-e4 and further 21 moves that lead to a white win) ?
Position 3:
Martin Leutwyler — IM Andreas Huss
Winterthur Chess Week 2002
After the moves 53. c4-c5 b6xc5 54. b4xc5 Kg5-f5 55. Kf1-e2 Kf5-e6 56. Ke2-e3 Ke6-d5 57. c5-c6 Kd5xc6 58. Ke3xe4 Kc6-d6 white found himself in a lost position, that black eventually won.
Can you find an improvement for white?
Position 4:
GM Normunds Miezis — GM Petr Haba
Winterthur Chess Week 2006
What is your evaluation of this pawn ending (white is to move)?
