Striped color squares in Arena Chess?

Striped color squares in Arena Chess?

With "Show Attacked Pieces" enabled in the Arena Chess app, I'm guessing colored squares mean something like the following.

YELLOW: Caution!...the piece is at risk even though defended, and an exchange might not be advantageous.

GREEN: Notice!...under attack but threat is low as the piece is well-defended, or an exchange would be favorable.

RED: Warning!...the piece is not sufficiently defended, is hanging or most likely to be captured.

But what do these colors indicate when diagonally striped?

I'm not sure - My version isn't doing that. Is this Arena for Windows? Also, which version of Arena?

I'm using v3.5.1 for Windows. I don't understand why the feature of showing attacked pieces does not work for you. Did you right-click anywhere on the board and select "Show attacked pieces"?

Yeah, I can get the colored squares for the attacked pieces, but they're solid colors, not hatched. It's possible that the hatched feature was removed in the Linux version, idk.

I think you're generally right about the meaning of the colors, I just don't know what the hatching might mean.

OK, I had to boot into Windoze and pull up ver 3.5.1 and play around with it. I think a cross-hatched square means that the piece on that square is not helping to protect one of its own attacked pieces. Conversely, a solidly colored square means that the piece on that square is helping to protect one of its own attacked pieces.

Yeah, they got rid of the cross-hatching in my Linux version of Arena. Maybe it was too confusing, or maybe it didn't convey very useful info, idk.

I enabled the feature and replayed a game, observing the situation each time a square lit up with a color. Striped red appeared when an undefended queen was attacked, also when a king was checkmated. So maybe you are correct.

I read a chessbase article that in its software, the three colors referred only to the severity of the attack. Too bad Martin Blume is inaccessible. The e-mail address he posts at his site is non-functional. Sigh!