The English Language

[Ian Thompson]

What does it mean that these pieces command a value of 3 points each?

"Command" just means "have", presumably referring to bishops and knights.

[soheil_hooshdaran]

So why he used 'command'?

[John McKenna]

"Command" sounds more impressive than other such words ("have", are worth, or when speaking of squares, control, cover, etc.)

When someone is fluent in a certain language we say they have a good "command" of that language.

[soheil_hooshdaran]

Bishops over Knights mean Bishops against Knights?

[Barry Sandercock]

Bishops over Knights probably means Bishops preferable to, or better than Knights.

[soheil_hooshdaran]

Why probably?

[IM Jack Rudd]

Because we haven't seen the context of the sentence in which the phrase appears.

[soheil_hooshdaran]

No context, it is the title of a section

[Barry Sandercock]

In that case, my original answer was correct.

[soheil_hooshdaran]

What does it mean that Black sells his e-pawn as dearly as possible?

[Barry Sandercock]

It means when he gives it up, he gets as much compensation for it as he can.

[MartinCarpenter]

Also typically, but not always, an implication that it was inevitably doomed.

[soheil_hooshdaran]

he says one of the two of his pawns were doomed.

[soheil_hooshdaran]

Any difference between being inferior to a piece and being weaker than it, for a piece?

[MartinCarpenter]

Not really. Very rarely weaker might be taken as N/B < R < Q etc while inferior can override that sort of basic consideration.