Engine engine number nine

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!

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".

Originally posted by wolfgang59
... or a queen!

Too late! I'm keeping my gold star.

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.

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.

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.

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.

Originally posted by BigDoggProblem


1. d8=Q+ *

[/pgn]

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

FOUL !!!

Originally posted by wolfgang59
FOUL !!!

Did you have another position in mind? 🙂

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.

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...

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

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.