Three chess rules which i can't understand . so need help.

[Dr.Wael Deeb]

I think the whole thread is a waste of time,the rules are there and we can't change them,the rest is empty words or another variation of the classical chess game

[smirobth]

2. Why pieces other than pawns can't capture the 2 squares moved pawn by moving into the first square . ?
(en passant).

The sense of the doublestep, or 2-squares-move of the pawns is to speed up the opening. But we don't want that a passed pawn can be created by that:
8/8/8/8/p7/8/1P1k4/1K6 w - - 0 1

Without e.p. rule, White could win with 1.b4 passing Black's a4 pawn, but that is not the purpose of the 2 squares-rule for the first pawn move. So, 1...axb3 would capture en passant here, 2.Kb2 draw.

I doubt that the ep rule was defined as it is for reasons related to the endgame. Rather I think it is in order to make creation of locked (closed) pawn structures more difficult without acquiescence of both players.

[Terry McCracken]

2. Why pieces other than pawns can't capture the 2 squares moved pawn by moving into the first square . ?
(en passant).

The sense of the doublestep, or 2-squares-move of the pawns is to speed up the opening. But we don't want that a passed pawn can be created by that:
8/8/8/8/p7/8/1P1k4/1K6 w - - 0 1

Without e.p. rule, White could win with 1.b4 passing Black's a4 pawn, but that is not the purpose of the 2 squares-rule for the first pawn move. So, 1...axb3 would capture en passant here, 2.Kb2 draw.

I doubt that the ep rule was defined as it is for reasons related to the endgame. Rather I think it is in order to make creation of locked (closed) pawn structures more difficult without acquiescence of both players.

You may be correct Robin, but I feel it was created for many reasons, and I agree with those reasons.

Best,
Terry

P.S. I agree with the good doctor, this thread is probably just wasting space. Murat probably gave the best answer or at least the most amusing answer

[Mike S.]

I doubt that the ep rule was defined as it is for reasons related to the endgame.

I didn't claim that, I only set up a simple position to illustrate how a passed pawn could be created by a pawn's first move, without e.p. rule - As for the reasons, see my quote from the Oxford companion above. I think that is a reference work which can be trusted.

[ozziejoe]

playing street chess in californnia, i discovered that on the street you are allowed to move your king into check, and are allowed to make a move other than getting your king out of check. I did not know this rule and did not know my king was in check, moved another piece, and the guy playing me announced "oh, that was a weak move" loudly so everybody else could hear and then took my king. I am still traumatized (especially since the game was dead even)

Alas, now that I have got that off my chest, I can return someday to the streets of california......and kill that man.

best
Joseph

[Terry McCracken]

playing street chess in californnia, i discovered that on the street you are allowed to move your king into check, and are allowed to make a move other than getting your king out of check. I did not know this rule and did not know my king was in check, moved another piece, and the guy playing me announced "oh, that was a weak move" loudly so everybody else could hear and then took my king. I am still traumatized (especially since the game was dead even)

Alas, now that I have got that off my chest, I can return someday to the streets of california......and kill that man.

best
Joseph

I remember playing lots of speed games both with friends and on the streets. Often the rules flew off the board along with the pieces!

King Chop Regards,
Terry

[smirobth]

I doubt that the ep rule was defined as it is for reasons related to the endgame.

I didn't claim that, I only set up a simple position to illustrate how a passed pawn could be created by a pawn's first move, without e.p. rule - As for the reasons, see my quote from the Oxford companion above. I think that is a reference work which can be trusted.

I believe the primary reason for the ep rule is to avoid locked pawns, not passed pawns.