Chess position - what do you think? Does White not win (easily)?

I learned how to play chess when I was a kid and have not played, at all, in almost 40 years. So, basically, I am a rank amateur who knows the moves but almost nothing beyond.

With that as a background, I am hoping you can give me some help with the following position. In particular, I am playing white against the computer and would seem to have an easy win in the offing. Damned if I can find it, though - it seems that no matter what move I make, it leads to black miraculously getting a draw (perpetual check or position repeated X3) or even beating me!

Position
White - pawns at a2, b3; rook at g4; queen at e4; king at h4
Black - pawns at a5, b4, c5, g7; queen at d6; king at h8

As I said, it looks like an easy win for White but I can’t find it. What would you play in this position, and why? Thanks, I appreciate your help!

Well, I put it to Fritz 12, and it said…

[SPOILER]Assuming White moves next, Rg5

The problem appears to be Qh2+; apparently, eventually you end up trading queens, at which point that extra pawn that Black has on your left (files a-c) can be a problem. It’s rated as a slight advantage for White, but it’s not an “easy” win by any means.[/SPOILER]

Kh3

This is quite an original position!

Although a rook is a massive advantage, White’s King has no pawn cover, so he can run into a lot of checks.
Once you exchange Queens, the win is trivial.

That Don Guy, I can’t believe that Fritz12 says only a slight advantage after the Queens come off - what is the computer’s main line analysis?

Zeldar’s 1. Kh3 is nice, since Black’s check of 1. … Qh6+ loses to 2. Rh4. Meanwhile White is threatening a combination of Rh4 and Qe8 (forcing exchange of Queens or checkmate.

My first though was 1. Qf4 (stopping …Qh2) and in reply:

  1. … Qd8+ 2. Qg5 (no checks and White threatens mate on g7)
  2. … Qe7+ 2. Kh3 (again no checks and Rh4 threatened)

P.S. I have an ELO rating of 2250 and teach chess professionally. :cool:

My mistake - I misread “±” (clear advantage for White) as “+/-”.

After an hour of analysis, the best line doesn’t turn out to include Qh2+ after all:

  1. Rg5 Qf6
  2. Kh5 Qf7+
  3. Kg4 Qd7+
  4. Kh4 Kg8
  5. Rxc5 Qd8+
  6. Kh3 Qd7+
  7. Qf5 Qxf5+
  8. Rxf5 a4
  9. ba
    and from here I don’t see how the white pawn on the a-file can be stopped from promoting.

Thanks for posting that - I was quite nervous about contradicting a computer. :eek:

The final position after 9. ba is so won, I’m surprised the computer couldn’t announce mate in about 10 moves…

Thank you all. I am much obliged!

I, too, thought that Qf4 was best. But, as I said above, I could not bring it to fruition. In fact, in some variations, I am embarrassed to say that I actually lost!

Oh, how I wish all these chess resources existed in my youth!

Chess Tablebases are very impressive.

They are constructed by forming a database of every legal position with (say) 5 pieces. Then given any 5 man position, the computer can announce:

  • whether it’s a win (and if so, how many moves to checkmate) or a draw
  • what the result of each individual move is

However the sheer number of possible positions means they’ve only reached up to 6 man endings so far.

So for example, with a simplified version of your position:

White Kh4, Qe4, Rg4
Black Kg8, Qd6, pg7

  1. Kh3 mates in 16
  2. Rf4 (and Rg2) mate in 17
  3. Qf4 mates in 20