Level
4-Rook
Chess Diagram
[Event "Puzzle #45"][Date "2008.11.14"][Result "0-1"][SetUp "1"][FEN "8/8/2p5/pp1p2k1/3P1pP1/1PP4K/P7/8 b - - 0 39"]39...f3 40.Kg3 f2 41.Kxf2 Kxg4 42.Ke3 Kg3 43.Kd3 Kf3 44.a3 a4 45.bxa4 bxa4 46.c4 Kf2 47.cxd5 cxd5 48.Kd2 Kf3 49.Kd3 Kf4 50.Kc2 Ke3 51.Kc3 Ke4 52.Kb4 Kxd4 53.Kxa4 Kc4 54.Ka5 d4 {Black checkmated white at move 63}
Another interesting endgame for Jonah at WYCC 2008 Vietnam happened in round 7. That time he was paired against the top player and contender for the title, player not only from India (the newest junior chess power in the World), but also with a decent FIDE rating of 1847. In the game JAIN, Jeet (IND, 1847) - LEE, Jonah (CAN) after 39 moves they reached the above position. See diagram and how the game continued. Questions:
a) Could have White saved the game? If yes, show when and how with explanations (5 points)
b) Did Jonah miss a clear win even at best play for White? If yes, show when and how with explanations (10 points)
Total available points for this puzzle is 15. The answers will be published next week together with puzzle #46.
Puzzle #44 solution:
This time it seems we had the toughest puzzle so far, nobody managing to get more than 1 answer correct out of the 3 possible. Hopefully everyone will remember tonight's lesson together and will use the same approach in their games. See solution for the correct answers:
[Event "Puzzle #44"][Date "2008.11.06"][Result "1/2-1/2"][SetUp "1"][FEN "8/5p2/4p1k1/p2pr3/5RK1/2P4P/P7/8 w - - 0 45"]45.Ra4? {This is a bad move since after trading Rooks as in the game, Black reaches a won King and pawns endgame} 45...Re4+ 46.Rxe4 f5+ 47.Kf4 fxe4 48.c4 dxc4 49.Kxe4 c3? {Loses the chance to win the game} (49...e5!! {Black simply wins since the White King cannot eliminate "c4" or "e5", while Black simply wins the h3-pawn and the endgame soon after. Observe the L-shape pawn formation for black} 50.Ke3 Kg5 {The h3-pawn must be controlled} 51.Kd2 e4 52.Kc2 Kh4 53.Kd1 Kxh3 54.Ke2 c3 {Black will promote and win}) 50.Kd3 Kh5 51.Kxc3 Kh4 52.Kd4 Kxh3 53.Ke5 Kg3 54.Kxe6 Kf4 55.Kd5 a4 56.Kc4 Ke5 57.Kb4 Kd6 58.Kxa4 Kc6 {Draw at move 65}
Correct solutions:
Joanne, Wilson, John, Joshua, Karl, Jeremy and Mark - 5 point
James, Jacky, Andy Q and Nathaniel - 1 point
Standings:
John - 74 points
Jeremy - 72 points
Andy Q - 71 points
Joshua - 69 points
Joanne - 63 points
Karl - 50 points
Mark - 49 points
Nathaniel - 44 points
Jacky - 41 points
Wilson - 39 points
Katerina - 33 points
James - 20 points
Darren - 18 point
a) Could have White saved the game? If yes, show when and how with explanations (5 points)
b) Did Jonah miss a clear win even at best play for White? If yes, show when and how with explanations (10 points)
Total available points for this puzzle is 15. The answers will be published next week together with puzzle #46.
Puzzle #44 solution:
This time it seems we had the toughest puzzle so far, nobody managing to get more than 1 answer correct out of the 3 possible. Hopefully everyone will remember tonight's lesson together and will use the same approach in their games. See solution for the correct answers:
[Event "Puzzle #44"][Date "2008.11.06"][Result "1/2-1/2"][SetUp "1"][FEN "8/5p2/4p1k1/p2pr3/5RK1/2P4P/P7/8 w - - 0 45"]45.Ra4? {This is a bad move since after trading Rooks as in the game, Black reaches a won King and pawns endgame} 45...Re4+ 46.Rxe4 f5+ 47.Kf4 fxe4 48.c4 dxc4 49.Kxe4 c3? {Loses the chance to win the game} (49...e5!! {Black simply wins since the White King cannot eliminate "c4" or "e5", while Black simply wins the h3-pawn and the endgame soon after. Observe the L-shape pawn formation for black} 50.Ke3 Kg5 {The h3-pawn must be controlled} 51.Kd2 e4 52.Kc2 Kh4 53.Kd1 Kxh3 54.Ke2 c3 {Black will promote and win}) 50.Kd3 Kh5 51.Kxc3 Kh4 52.Kd4 Kxh3 53.Ke5 Kg3 54.Kxe6 Kf4 55.Kd5 a4 56.Kc4 Ke5 57.Kb4 Kd6 58.Kxa4 Kc6 {Draw at move 65}
Correct solutions:
Joanne, Wilson, John, Joshua, Karl, Jeremy and Mark - 5 point
James, Jacky, Andy Q and Nathaniel - 1 point
Standings:
John - 74 points
Jeremy - 72 points
Andy Q - 71 points
Joshua - 69 points
Joanne - 63 points
Karl - 50 points
Mark - 49 points
Nathaniel - 44 points
Jacky - 41 points
Wilson - 39 points
Katerina - 33 points
James - 20 points
Darren - 18 point
2008 WYCC Vietnam challenge