Value of the Queen, 9 or 10 points?

Generally : queen + pawn against two rooks is considered equal.
Obviously, it depends of the position. 

in my school if a chess game wasnt finished in 10 minutes (way too less) then the player with more material on board was declared winner (absolutley unfair no doubt, but i was my school's chess champion at the meagre rating of 1200 or less at age 15!!!!!!; so just drop it ,whatever you were thinking ; because such a school cannot be expected for mature rules)

for those counting purposes ; queen was given 9 points. however you can lock your queen in a corner it can go as low as 6 points(postionally )

so it depends on where you want to use this value..

Interestingly xxvalakixx , I learned chess at a junior at a dutch chess club 25 years ago and I am pretty sure my study books and teachers said 10 points for the Queen.  Apparently that has evolved since then.

The point system is relative, but i find it very useful anyway.

Here is a case where a single pawn at the starting vault is valued more then the whole Black army.

White to move, wins. Actually it's mate in 16.

Most engines need many minutes to find out how, excluding the "weak" Houdini 4, which finds the win almost instantly. Apparently another symptom of move pruning.

I cheated. I used SOS 5.1 with a brute force search. Found in about 11 seconds.

(Disclaimer - This was an unusual case where there aren't many possible moves. In more normal cases, it would take forever for a brute force search to reach reasonable ply depths.)

Most accurate piece values known ae the Kaufman values (based on statistics of GM games), which have Q=9.5. It depends a bit to what you compare the Queen, however, as the Kaufman values for N or lone B are 3.25.

666

My engine found it immediatly:

Nueva partida
8/8/8/2p5/1pp5/bppp4/qprrpK1P/1nkbn3 w - - 0 1

Analysis by Stockfish 140719 64 BMI2:

1.Rxe1 Da1 2.h3 Da2 3.h4 Da1 4.h5 Da2 5.h6 Da1 6.h7 Da2 7.h8C Da1 8.Cg6 Da2 9.Ce5 Da1 10.Cd7 Da2 11.Cxc5 Da1 12.Cd7 Da2 13.Ce5 Da1 14.Cxc4 Da2 15.Ca5 Da1 16.Cxb3#
+- (#16) Profundidad: 100/32 00:00:02 6008kN, tb=52
(Anon, 03.08.2019)

Rather than starting a thread, I am bringing up an old topic: Is the queen worth 9 points? When I was young (four decades ago?), the queen was valued at 10 This seemed OK, though perhaps a bit generous in a handful of board situations. I only just noticed that chess.com gives it 9 points. I am glad that chess theory continues to evolve, but it begs the question: How is it possible that such basic perceptions can change in a game that has been played for so long by so many bright people all over the world?

Queen is worth 9 points, but the thing is, not every position is the same. For instance, if the king of the side with 2 rooks is exposed and rooks are not coordinated, queen might exploit the weakness of the enemy king and pick up some pawns.

In such a situation, queen is better than 2 rooks for instance. If the rooks are coordinated and they can find a weak pawn, they can easily win a pawn because there are 2 rooks, and only one queen, so there is a strength in numbers  when attacking a single point.

In general, point system is just a guideline, and depending on the position, even a bishop might be more valuable than the rook, for instance if you give up a fianchettoed bishop, in opposite side castling situations, you might win the exchange and lose your king in the process. 

Or you might have a situation where one side has a queen for 3 minor pieces, which is equal point wise, but theoretically 3 minor pieces should be better than a queen in the middlegame, while queen's power rises if the game progresses to the endgame.

In this paper, alphazero estimates a queen to be 9.5 while a rook to be 5.6 (table 6) if you believe AI.

They did a lot of work on the game dynamics of alternative chess rulesets. I would like to believe that medieval chess players adopted castling and two-square pawn moves because they saw that it would improve the game.

9.46, except against two rooks with both players having pawns that are connected and on the same side. Then, it’s 7.3.

When I started coaching children, the school was doing this. It was the first thing I changed.

The queen can also be quite violent in fast disciplines, such as blitz and bullet. The latter increases the queen in relative value because the general level of inaccuracy increases proportionally due to small time on the clock. It is a plausible theory that is quite visible.

Does it really matter if Q is 9 or 9.5 really? Ten points is excessive.

R + R > Q

It depends on the position and is debatable, but in most positions two rooks are better than a queen. For example, a two rook vs. queen endgame is winning. As of right now, the most accepted point value is 9 points for a queen.

yo