Puzzle of the week #170

Chess Diagram: 

[Event "Puzzle #170"][Date "2011.08.30"][Result "0-0"][SetUp "1"][FEN "rnbqkb1r/ppp1pppp/8/3p4/8/8/PPPPPPPP/RNBQKB1R w KQkq - 0 1"]

Here we are near the end of another school year at the club. It has been a long journey for all of us and most of you have become better players. There is no greater pleasure for a teacher than seeing his students succeed! I am going to close this year with an unusual but logical puzzle; all you have to do is:
a) Going from the starting position reach the present one by using only legal moves

Total available points for this puzzle is 10. The answers will be published next week together with puzzle #171.

Puzzle #169 solution:
Lisitzin, puzzle #613. Most of you did not know when to stop adding moves to the solution. This is the reason only two of you got maximum points. We are going to work on this type of endgames next year as well; it is way too important to let it slip from your memory. James had one of the correct answers; here it is:
a) Material: The material is even. King Activity: Both Kings are close to the side. Centre: White's pawn is controlling it and Black's pawn is in the centre. This is a King pawn endgame. Since the Kings are close together, Black can play the opposition against White. To keep Black pawn safe, Black King should approach the White King and stop it moving to third rank on the Queen side. Then, when White King is forced to move away from its pawn, Black King can capture the pawn and promote its own to win the game.
b) See solution:

[Event "Puzzle #169"][Date "2011.08.30"][Result "0-1"][SetUp "1"][FEN "8/8/8/8/k3p3/4P3/1K6/8 b - - 0 1"]1...Kb4 2.Kc2 Kc4 3.Kd2 Kb3 4.Ke2 Kc2 5.Kf2 Kd2 6.Kf1 Kxe3 7.Ke1 Kf3 8.Kf1 e3 9.Ke1 e2 10.Kd2 Kf2 {Black wins}

Correct solutions:
Ziyao, James - 20 points
Harmony - 18 points
Daniel, Leroy, Kevin, Alex, Philip - 15 points
Leo, Derrick - 10 points

Ziyao - 449 points
Harmony - 443 points
James - 401 points
Philip - 372 points
Alex - 330 points
Leo - 295 points
Daniel - 247 points
Leroy - 242 points
Derrick - 234 points
Jeffrey - 168 points
Frank - 136 points
Kevin - 117 points
Eric - 29 points
Danny - 19 points
Karl - 13 points


Logical puzzle (1)