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        riddles >> easy >> Construct a Game (Chess)
        
(Message started by: THUDandBLUNDER on Jul 13^th, 2005, 5:36am)

Title: Construct a Game (Chess)
Post by THUDandBLUNDER on Jul 13^th, 2005, 5:36am

Construct a game that finishes with 6. P(g7) x f8 = N mate.

Title: Re: Construct a Game (Chess)
Post by SMQ on Jul 13^th, 2005, 6:30am

Key realizations:

1) [hide]White has one more move than needed to get the pawn there, so there must be another white piece involved[/hide]
2) [hide]Black's king must have moved to be attackable from f8. and must not be able to move back[/hide]
3) [hide]f8 must be protected form Black's queen, either because she's noved or because a piece other than the king interposes.[/hide]
4) [hide]If black's knight at g8 has moved, f8 is attacked by black's rook at h8 (unless it has moved as well)[/hide]

--SMQ

Title: Re: Construct a Game (Chess)
Post by Leonid Broukhis on Jul 13^th, 2005, 12:28pm

From a friend:
[hide]
1. h2-h3 d7-d6
2. h3-h4 e8-d7
3. h4-h5 b7-c6
4. h5-h6 g8-f6
5. h6xg7 f6-e8
6. g7xf8N
[/hide]

Title: Re: Construct a Game (Chess)
Post by SMQ on Jul 13^th, 2005, 1:05pm

on 07/13/05 at 12:28:45, Leonid Broukhis wrote:

[hide]3. ... b7-c6[/hide]

eh?

Quote:

[hide]6. g7xf8N[/hide]

[hide]6. ...+ h8xf8[/hide]

I had:
1. [hide]h4 d5[/hide]
2. [hide]h5 Nd7[/hide]
3. [hide]h6 N(d7)f6[/hide]
4. [hide]xg7 Kd7[/hide]
5. [hide]Rh6 Ne8[/hide]
6. xf8=N++

--SMQ

Title: Re: Construct a Game (Chess)
Post by Leonid Broukhis on Jul 13^th, 2005, 1:57pm

on 07/13/05 at 13:05:28, SMQ wrote:

eh?

[hide]6. ...+ h8xf8[/hide]

--SMQ

I'm just a messenger. I do not have a board nor mental visual acuity to verify it.

Title: Re: Construct a Game (Chess)
Post by THUDandBLUNDER on Jul 17^th, 2005, 1:14am

Correct, SMQ.

Now construct a game which ends with 6. BxR (on c4) mate.

Title: Re: Construct a Game (Chess)
Post by THUDandBLUNDER on Jul 17^th, 2005, 1:16am

Correct, SMQ.

Now construct a game which ends with 6. BxR (on c4) mate

AND

what is the shortest game in which only knights are allowed to move?

Title: Re: Construct a Game (Chess)
Post by SMQ on Jul 18^th, 2005, 5:53am

Quote:

what is the shortest game in which only knights are allowed to move?

I get:[hideb]
1. Nf3
2. Nd4
3. Ne6 (or Nc6)
4. Nxd8 Nc6
5. Ne6 Nd8
6. Nxc7++

Black can do pretty much anything for the first three or four moves, so long as he can make 5. ... Nd8.

[/hideb]

Still working on the other one; Bishop takes Rook?! :)

--SMQ

Title: Re: Construct a Game (Chess)
Post by THUDandBLUNDER on Jul 19^th, 2005, 7:44am

Correct, SMQ. :)

White can also capture the bishop:
[hide]1. Nf3 Nc6
2. Ng5 Ne5
3. Nxh7 Ng6
4. Nxf8 Nh6
5. Ne6 Nf8
6. Nxg7 mate.
[/hide]