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Engine engine number nine

Engine engine number nine

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Originally posted by wolfgang59
Construct a position where with one move 6 pieces are attacked.
(There being none attacked before the move)




... without using a knight!
... or a queen!

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Originally posted by tvochess
The pawn on e5 is the seventh on the board, so is not included in my count.
You're thinking "none of the 6 pieces" and I'm thinking "none of the pieces".

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Originally posted by wolfgang59
... or a queen!
Too late! I'm keeping my gold star.

1 edit
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Originally posted by wolfgang59
... or a queen!


Without using a Q in the diagram, but with using a Q in the play.


Originally posted by Ponderable
It is already under attack from the Knight...
??? A diagonal is already under attack by a knight?

The horsey moves like an L, son... it can't attack a diagonal.

I know you were talking about the knight that sits on said diagonal but I was clearly not talking about that knight because I'm pretty sure that if I was, I would have said so.

The knight can discover two diagonals and one isn't being utilized. A different layout of the pieces in order to utilize both diagonals should be possible... hence why I believe 10 is not the maximum.

1 edit
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Originally posted by iChopWoodForFree
??? A diagonal is already under attack by a knight?

The horsey moves like an L, son... it can't attack a diagonal.

I know you were talking about the knight that sits on said diagonal but I was clearly not talking about that knight because I'm pretty sure that if I was, I would have said so.

The knight can discover two diagonals and one isn ...[text shortened]... order to utilize both diagonals should be possible... hence why I believe 10 is not the maximum.
On the second diagonal there is already a piece which is attacked by the Knight. The position in Question id d4 in the diagram, actually occupied by an L-shaped moving Knight. A bishop or Queen attacking the diagonal would sit on f6 or g7 or h8 but still can only attack d4 which is already attacked by my L-shaped moving Knight.

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Originally posted by BigDoggProblem
You're thinking "none of the 6 pieces" and I'm thinking "none of the pieces".
Ok, that's another way to look at it. But I'm still happy with my solution :-p


Originally posted by iChopWoodForFree
The horsey moves like an L, son...
Son? Seriously?

You're such a canker sore on this forum.

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Originally posted by tvochess
1 more.

[pgn]
[FEN "1Q1K4/R3R3/8/N1PBN3/1BPn3r/3rb3/8/k7 b - - 0 1"]
{No white pieces attacked} Nc6+ { 10 pieces attacked. This is probably the maximum.}
[/pgn]
Or, black to move and white to win.

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Originally posted by BigDoggProblem


1. d8=Q+ *

[/pgn]

Without using a Q in the diagram, but with using a Q in the play.
FOUL !!!

1 edit
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Originally posted by wolfgang59
FOUL !!!
Did you have another position in mind? 🙂

2 edits
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Originally posted by Ponderable
On the second diagonal there is already a piece which is attacked by the Knight. The position in Question id d4 in the diagram, actually occupied by an L-shaped moving Knight. A bishop or Queen attacking the diagonal would sit on f6 or g7 or h8 but still can only attack d4 which is already attacked by my L-shaped moving Knight.
You aren't getting it. Forget the position in the diagram. The point is a knight can discover two diagonals wherever it moves unless it is on the edge of the board... That is why I said that the aforementioned position could not be the maximum number of pieces that could be attacked.

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Originally posted by iChopWoodForFree
You aren't getting it. Forget the position in the diagram. The point is a knight can discover two diagonals wherever it moves unless it is on the edge of the board... That is why I said that the aforementioned position could not be the maximum number of pieces that could be attacked.
Set up a diagram shwong your point then.

You will discover that the Knight has a limited reach (by his L-shaped move) a figure on the diagonal the Knight is freeing is always covered by that Knight on his new position...

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White to move attacks all six of Black's pieces, none of which were attacked before. No queens or knights.

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Let's define an 'attacked' square as one upon which a legal capture can occur.

Construct a position where:

1) No black units are attacked.

2) After white moves, ALL 16 black units are attacked.

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