White to move. How should white proceed?
Source: ChessToday.net
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White to move. How should white proceed?
Source: ChessToday.net
Qd8+ then in next move force exchange of queens?
With Qd8+, White threatens a further check from b6, c7, or d7, exchanging queens and promoting its extra pawn. Wherever Black plays its king, falls in one of these simplifying checks (and interposing with Qe7 doesn’t help either, of course).
1. Qd8+
easily and desicivly enforces the queen exchange:
A:
1. … Kf7/Kg7/Ke5
2. Qc7+
B:
1. … Ke6/Kg6
2. Qb6+
C:
1. … Kf5
2. Qd7+ Qxd7
3. Kxd7
1. Qd8+
if 1…Kf7 or Kg7 then 2. Qd7+ or Qc7+
if 1…Ke6 or Kg6 then 2. Qb6+
if 1…Ke5 then 2.Qc7+
if 1…Kf5 then 2.Qd7+
if 1…Qe7 then 2.Qxe7
In any case the fork forces the exchange of Qs and the pawn promotes
qd8
The white queen must give a check from b6, b7, b8, c7 or d7 and thus force swapping queens:
1. Qd8+!
1. … Ke6/Kg6 2. Qb6+
1. … Kf7/Kg7/Ke5 2. Qc7+
1. … Kf5 2. Qd7+
1.a6!! Qxa6
2.Qc6! double attack wins the black queen.
Qd8 simple exchange the queen and win it.
1.Qd8+
If 1…Kf5 2.Qd7+ win
If 1…K(e5,e7,f7,g7) 2.Qc7+ win
If 1…K(e6,g6) 2.Qb6+ win
Mohanta
A very tough ending.
Obviously, white wants to double attack from one of the following squares- b6, b7, b8, c7, or d7 to force the exchange of queens and then queen his pawn.
Now, can white allow black to beginning checking the white king at any point? Under only certain circumstances- those circumstances will be those that allow white to block a check at some point with his own queen while delivering a check himself that forces the queens off the board.
Now, what is black trying to avoid? At the beginning, he is trying to avoid putting his king on the 7th rank when white’s queen can come to b7-d7, avoid putting his king on the g1/a7 diagonal when white can come to b6, avoid putting his king on the following diagonals- h1/a8, b8/h2, c8/h3. Now let’s look at one possible beginning for white to see some of the issues involved in this ending:
1. Qd6 Kg5!
An only move. Black loses instantly with Kf5 when white checks with 2.Qd7. Also, Kf7 and Kg7 lose to the same check. Continuing:
2. Qe5
Nothing will win by force now, I think. This is the most relevant line, in my opinion, however. Continuing:
2. …..Kg4
I think Kh4 is also a draw, but a move like Kg6 or Kh6 might actually lose, though I am not 100% certain of this: [2. …Kh6 3.Qb5 Qa8 4.Kc7 Qa7 5.Kd6 Qd4 6.Qd5 and now we are at a critical juncture in this sideline- black can continue the checks from either b4 or f4 (Qf6+ loses to Qe6 blocking and pinning), or move the queen elsewhere that doesn’t check. Continuing along the side variation with Qf4: 6. …Qf4 7.Kc6 Qa4 8.Kb6 Qb4 9.Qb5 Qd4 10.Qc5 Qb2 11.Ka7 Qg7 12.Kb8 Qg8 13.Kb7 Qh7 14.Qc7 and suddenly black is out of checks that don’t exchange the queens. White is going to start pushing the pawn supported by the king. I don’t think, after 2. …Kh6, that black can prevent white from establishing this position. With the black king on rank six at h6, it is only a matter of maneuvering properly. From move 14 above, it takes black a queen move and a king move to even be able to check white again without an immediate queen exchange: 14. …Qd3 15.a6 Kh5 16.a7 Qb5 17.Qb6 Qd7 18.Ka6 Qc8 19.Kb5 Qd7 (or 19. …Qa8 20.Qc7 Kg4 21.Kb6 Qf8 22.Qc4 Kg3 23.Qb3 with a check from the a-file coming followed by a8Q) 20.Ka5 Qd2 21.Ka6 Qg2 22.Qc5 and black is going to have to allow a check from the 8th rank followed by a8Q winning the game.] So, I hope we can see now that black’s king cannot allow white to establish defensive perimeters like that seen at move 14- so black’s king must not only get away from the diagonals and ranks I mentioned at the beginning, but he must also make sure not to end up on rank 6 either. Continuing with the main line from move 2 way above:
3. Qe4 Kg5
Here, all moves should be a draw for black- he just needs to avoid make bad moves to rank six. Continuing:
4. Qg2
To push black back, but it doesn’t work:
4. …..Kh4 and as long as black’s king stays within this area of Kg5, Kh5, Kg4, Kh4, he should be safe from such maneuvers as seen above by white in the side variation started by 2. ….Kh6, for example.
In my next comment, I will try to establish the correct method for white.
In my previous comment, I discussed some of the issues in this ending. In particular, I hope I showed in an understandable way where the black king wants to go- he wants to get to the fifth rank and below without allowing white a check from b6, b7, b8, c7, or d7. This involved, after 1.Qd6+, getting the king to g5, h5, g4, and h4, and keeping him there, with the proviso that he not allow white checks from the squares mentioned above. Now, the question is this- can white foul up black’s plans right from the start? I think he can, and quite quickly:
1. Qd8!
This is probably the only winning move. Any other check seems to have the exact same problems I see in 1.Qd6+, and I don’t see how 1.Kd8 can possibly help matters. We will see below the effects of 1.Qd8:
1. …..Kg6
Again, if Kf7 or Kg7, white checks from either d7 or c7 forcing the queens off. If Kf5, white checks from d7, too, and from c7 if black has played to e5 And on Ke6, white just proceeds with Qb6 as before:
2. Qb6+ and the queens come off followed by queening of the pawn.
Hello
1. Qd8+
Options for black
1. …. , Kf7 or Kg7
2. Qd7+ or Qc7+, Qxd7 or Qxc7
3. Kxd7 or Kxc7 winning
1. …. , Kf5
2. Qd7+ , Qxd7
3. Kxd7 winning
1. …. , Ke5
2. Qc7+ , Qxc7
3. Kxc7 winning
1. …. , Ke6 or Kg6
2. Qb6+ , Qxb6
3. axb6 winning
1. …. , Qe7
2. Qxe7+ , Kxe7
3. a6 winning
Greetings from Spain
For Anonymous
1.a6!! Qxa6
2. Qc6! double attack wins the black queen
Black are also playing…
2. Qc6+ , Qxc6+ and whire are lost…
Qc6+ after black’s move, white can safely play a6.
What’s in your glasses today?
1. a6?? Qxa6+
yes, it’s check!
say no more …