Rich As A King

Saturday, March 29, 2014

Special brain challenge by Mamedyarov


White to move and win.

Challenge by GM Mamedyarov, posted by Goran Urosevic


The Webster U SPICE Chess Team took about 5 minutes to solve it. Can you do it faster?

9 comments:

Silpo.......the Thinker.... said...

1. fxg3 fxe3 (if fxg3 then 2.bxc7 Kb7 3.cxd6 exd4 4.exd4 Kc8 5.Kg2 wins ) 2.Kg1 exd4 3. bxc7 Kb7 4.cxd6 d3 ( or 4...Kc8 ) 5.Kf1 wins....
Is the solution correct?

Silpo.......the Thinker.... said...

1. fxg3 fxe3 (if fxg3 then 2.bxc7 Kb7 3.cxd6 exd4 4.exd4 Kc8 5.Kg2 wins ) 2.Kg1 exd4 3. bxc7 Kb7 4.cxd6 d3 ( or 4...Kc8 ) 5.Kf1 wins....
Is the solution correct?

Prof.S.G.Bhat said...

1.bxc7 Kb7
2.cxd6 sets up connected passed pawns black having made no progress of any kind.but
2.... gxf3
3.Kg2 f3+
4.Kxf2 e4 black draws.White K is tied up and passed pawns make no progress.

Prof.S.G.Bhat said...

I gave up 1.bxc7 Now from other end
1.fxg3
(a)1... f3 2.g4 wins.
(b)1.... fxg3 2.bxc7 Kb7 3.cxd6 wins.
(c)1.... fxe3 2.Kg2 exd4 3.cxd6 cxd6 4.g4 wins.
(d)1.... cxb6 2.dxe5 fxe3 3.Kg2 dxc5 4.e6 wins.
(e)1.... exd4 2.bxc7 Kb7 3.c6+ Kxc7 5.exd4 Kxc6
(5.... fxg3 6.d5)6.g4 is a winning position for white.If6... Kd5 7.f5!! I think this is the main variation.

Anand Gautam said...

To solve it first I need to know the problem with:
1. bxc7 Kb7
2. cxd6 gxf2 (What else?)
3. Kg2 fxe3 (What else?)
4. dxe5 1-0

mesilah said...

Obviously the solution involves taking the pawns and trying to queen a pawn first.
Let's try:
1. b6xc7 Kb7(forced)
2. c5xd6 g3xf2
3. Kg2 f4xe3
Now, if White plays
4. d6-d7 then Black plays
4...Kxc7 and White cannot queen a pawn, since the Black king will just take the pawns as they come down the board.
Therefore:
4. d4xe5!
Now, Black cannot stop a White pawn queening, whereas White can stop the Black pawns.
For example:
4....e3-e2
5. Kxg2
Alternatively, if
4...Kc8 then
5. e5-e6
and Black cannot stop either the c-pawn, d-pawn or the e-pawn from queening.
I saw the solution very quickly, but it takes time to write it all out.

Yancey Ward said...

This is a much harder puzzle than I first suspected. This first move in this line just leaps out at me:

1. bc7

This move just jumps out at me because of its forcing nature. Black has a simple choice between two moves- Kb7 to prevent an immediate c8Q+, and gf2:

1. .....Kb7

Or [1. ...gf2 2.c8Q Ka7 3.Qc7 Ka8 4.Kg2 wins easily]. Continuing:

2. cd6

Protecting the c7 pawn and tying the black king down on b7/c8 for the rest of the play. Now if black takes the d- or the e- pawns, white simply recaptures and safely prevents black from ever creating connected passers. If black pushes e4, white takes at f4 preventing the creation of connected passers, and if black pushes f3, white takes at g3 creating a third passed pawn that is decisive. If black pushes g2, white just takes at g2 to win. Finally, if black plays Kc8, white just takes at e5 to create a third passer to win. This leaves as the only plausible defense....

2. .....gf2
3. Kg2

And, now, black can create connected passed pawns, but this simply allows white to create a third passed pawn with which to win:

3. .....fe3 (alternatives below)
4. de5

And white can hold up the two black passed pawns, but black's king cannot stop all three of white's pawns. Or, at move 3:

3. .....ed4
4. ef4 and both black pawns are toast.

The most tenacious defense at move 3, however, is.....

3. .....f3!
4. Kf2 e4!

And I don't see how white wins this now. He has a pawn edge, but that extra pawn is doubled. Both kings are tied down defending against the opponent's advanced passers- and white can't push his connected pawns without losing them.

I have to go back to the drawing board.

CraigB said...

1. bc seems obvious

If 1....gf
2. c8Q+ Ka2
3. Kg2 fe
4. de looks won since 4... dc loses to Q:c5+ and 4...de 5. c6 will shortly let white promote another pawn.

If 1... Kb7
2. cd gf
3. Kg2 fe
4. de and wins

Yancey Ward said...

I have done a thorough look through 1.fxg3, but it looks like the only other path.