Last time we looked at a pawn ending played between two young players (about 1500-1600 strength) at Richmond Junior Chess Club. After various misadventures, during which Black miscalculated badly in a position where he had a simple win, this position was reached, with White to play.
Before we continue looking at the game, some basic endgame knowledge. Everyone needs to know the ending with queen against pawn on the 7th rank supported by the king. If the pawn’s on a centre file or knight’s file the queen wins. You force the king onto the queening square and advance your king. Against a bishop’s pawn or a rook’s pawn, though, it’s a draw unless your king’s close enough to take a hand in a checkmate. With a bishop’s pawn, the defender can move his king into the corner so that taking the pawn will result in a stalemate. Likewise, with a rook’s pawn, the king in the corner will be stalemated.
Another piece of basic knowledge is that you can stop a pawn on the 7th rank easily if you can put your queen on the promotion square. All you have to do then is approach the pawn with your king.
Bearing that in mind, let’s see what happened in the game, with White to play his 60th move.
Black has the potentially drawing c-pawn, and two others as well, but his king is on d3 rather than d2. White has several ways to bring home the full point. A nice winning move is 60. Qh3+, when Kd2 walks into 61. Qe3+ Kd1 62. Qe1#, while moving back to, say, c4 allows Qe3, controlling the queening square. White can then follow up with Qc1 and just take all the black pawns. A similar idea is 60. Qh6, again followed by Qc1. But instead the game continued:
60. Qd8+ Kc3 61. Qxf6+
In some lines White might want to keep the f-pawn on the board to prevent the stalemate defence, but after this White’s still winning.
61… Kd3 62. Qf3+ Kd2
Allowing an immediate mate, but otherwise the king will be cut off on the fourth rank.
Missing the mate in 2: 63. Qe3+ Kd1 64. Qe1#. White’s still winning at the moment, though.
63…Kc1 64. Kxg2?
This is the move that throws away the win. It’s not so easy at this level, but the winning idea was 64. Qb5 (avoiding the stalemate defence) Kd1 65. Qb3 Kc1 66. Kxg2 Kd2 67. Qb2 Kd1 68. Kf2 c1Q 69. Qe2#.
64… Kb1 65. Qd3 Kc1?
Now White’s winning again. Instead, Ka1 was drawing.
It looks natural to move the king in but now Black has the chance to revert to the stalemate defence. Again, the win was to be achieved by occupying the b-file. For example: 66. Qb3 Kd2 67. Qb2 Kd1 68. Kf2 Kd2 69. Qd4+ Kc1 70. Qb4 Kd1 71. Qe1#.
66…Kb2 67. Qd2 Kb1 68. Qb4+ Kc1?
The final mistake. Black still had a draw by moving to the a-file.
White had to be careful: Ke2 and Ke1 were both stalemate. There was another mate in two, though: 69. Kf1 Kd1 70. Qe1#.
69…Kd1 70. Qd2#
Once more, then, a lot to learn from this game. These endings with pawn on the 7th rank against queen are so important and essential for understanding many pawn endings. As I tell all my students, you can’t understand other endings until you understand pawn endings, you can’t understand middle games until you understand endings, and you can’t understand openings until you understand middle games.
For the record, here’s the complete game.