Look at this. Its a mate in 6!

Exuma

Anansi

Only Chess

24 Jan 13

Exuma

Anansi

Woodshed

Joined: 16 Apr 07
Moves: 35523

24 Jan 13

1

Black to play with a huge material advantage. But! We are chess players, the clever mate is better than the trade down and endgame it. What is the best move here? I could not find it. Hint - you must sac the rook.

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Exuma

Anansi

Woodshed

Joined: 16 Apr 07
Moves: 35523

24 Jan 13

Hahahaha. OK this is impossible. Good luck without any silicon

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

-1

Originally posted by Exuma
Hahahaha. OK this is impossible. Good luck without any silicon

We can't even use the RHP analyze board on this one. However, we can set up a physical analyze board to solve it, right? That is the only way I have a chance to solve these longer checkmate problems.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

-1

Is it necessay it get the other knight developed?

tomtom232

Joined: 15 Jun 06
Moves: 16334

24 Jan 13

Originally posted by RJHinds
Is it necessay it get the other knight developed?

Kudos to you if you didn't use an engine because that is what I was thinking.

I probably would play ...Nc6 in real life because the rook can't be taken immediately.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

-1

Originally posted by tomtom232
Kudos to you if you didn't use an engine because that is what I was thinking.

I probably would play ...Nc6 in real life because the rook can't be taken immediately.

Another possibility is to check with the queen at g2.

tomtom232

Joined: 15 Jun 06
Moves: 16334

24 Jan 13

Originally posted by RJHinds
Another possibility is to check with the queen at g2.

I thought about that too but then ...Nc6 doesn't work after white takes the rook because then the king can retreat to c2.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

6 edits

-1

Originally posted by tomtom232
I thought about that too but then ...Nc6 doesn't work after white takes the rook because then the king can retreat to c2.

This is the way the first move will look:

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1.	Qg2	Kxd3
2.	Qxf1	Kxe4
3.	Qxc4	Kf3

-18

Or maybe better is:

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1.	Qg2	Kxd3
2.	Qxf1	Kxe4
3.	f5	Kd5

-18

tomtom232

Joined: 15 Jun 06
Moves: 16334

24 Jan 13

Originally posted by RJHinds
This is the way the first move will look:

[pgn]
[FEN "rn4k1/ppp2pbp/6p1/4p3/1PP1nP2/3rP3/P2PK3/RN3N1q b - - 0 1"]
1. Qg2+ Kxd3 {Then maybe} 2. Qxf1+ {now if...} 2...Kxe4 3. Qxc4+ Kf3
[/pgn]

3...f5 seems to lead to mate just not in 6.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

6 edits

-1

Originally posted by tomtom232
3...f5 seems to lead to mate just not in 6.

Yes that looks better, How about this:

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1.	Qg2	Kxd3
2.	Qxf1	Kxe4
3.	f5	Kd5
4.	Qf3	Ke6
5.	Qc6	Ke7
6.	Qd7

-18

tomtom232

Joined: 15 Jun 06
Moves: 16334

24 Jan 13

1 edit

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RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

3 edits

-1

What happens if the white king goes to e1 or d1 like this?

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1.	Qg2	Ke1
2.	Qf2	Kd1
3.	Qxf1	Kc2

-18

or

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1.	Qg2	Kd1
2.	Qxf1	Kc2

-18

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

24 Jan 13

6 edits

-1

We don't need to worry about that second variation anymore because it just transposed into this one:

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1.	Qg2	Ke1
2.	Qf2	Kd1
3.	Qxf1	Kc2
4.	Rxd2	Nxd2
5.	Qxa1	Nxe4

-18

Any suggestions as to changes is this variation so we can get a checkmate in 6 moves? Would 1. f4 or 1. Nc6 be worth trying? This Qg2+ line will work if black makes the most logical moves, however, this is a puzzle and logical moves are not always part of the solution. 1. Rxd2+ is another possibility.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

25 Jan 13

4 edits

-1

How about this:

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1.	Qg2	Ke1
2.	Qf2	Kd1
3.	Qxf1	Kc2
4.	Nc6	a3

-18

Well, I have to stop and eat supper now.

RJHinds

The Near Genius

Fort Gordon

Joined: 24 Jan 11
Moves: 13644

25 Jan 13

7 edits

-1

Another possibility is ...

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1.	Qg2	Ke1
2.	exf4	Nc3
3.	Bxc3	Rb1
4.	Qf2	Kd1
5.	Rxd2	Nxd2
6.	Qxd2

-18

White might try ...

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1.	Qg2	Ke1
2.	exf4	Kd1
3.	fxe3	Nxe3
4.	Rxd2	Kc1
5.	Bb2

-18

White might try ...

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1.	Qg2	Ke1
2.	exf4	exf4

-18

It appears the the two white knights need to stay put and guard the d2 pawn because one is not enough unless the Black queen is not attacking d2.

Black might try ...

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1.	Qg2	Ke1
2.	exf4	exf4
3.	Bc3	Kd1

-18