Isolani for black

 Robert did the same for the black pieces:

Same position Numbers for the dark squared bishop

Bf6 is the better position for the bishop. 

The reference square h8 where the bishop exerts little influence scores a measly minus 0.92

Would the bishop be on b4 he would be able to gain wood immediately.

Same position Numbers for Nd5

The Knight seems to be reasonably placed on d5. f6 is slightly better, but the bishop is even better place there.


Same position Numbers for Nc6
The knight is on its best square.

Same position Numbers for the Queen

The Queen seems to have two better squares.

I hope to have some time tomorrow to think about what all these numbers mean. I'll keep you posted. Robert thanks for the effort!

Comments

  1. Robert CobleThursday, June 27, 2024 at 2:36:00 PM GMT+2

    PART I:

    For the silent observers:

    Here is the method I used. It may be slightly different from the process that Temposchlucker used, simply because he used Arena and Stockfish; I used Chess Tempo and Stockfish. I’m fairly certain that the versions of Stockfish are probably the same or not very different versions. The Chess Tempo version is the NNUE (Neural Network Updateable Easily).

    Here is the base game.

    Zvjaginsev, Vadim (2659) vs Vasquez Schroeder, Rodrigo (2542)
    Date: 2013-06-08
    Event: World Rapid Championship 2013, Khanty-Mansiysk
    Round: 14.16
    Result: 1-0
    Opening: Scandinavian Defense, Panov Transfer (B01)
    Problems: 82630270
    1. c4 c6 2. e4 d5 3. exd5 Nf6 4. Nc3 cxd5 5. cxd5 Nxd5 6. Nf3 e6 7. Bc4 Nc6 8. O-O Be7 9. d4 O-O 10. Re1 Nf6 11. a3 a6 12. Ba2 b5 13. d5 exd5 14. Nxd5 Nxd5 15. Qxd5 Bb7 16. Qh5 Qc7 17. Bg5 Bxg5 18. Nxg5 h6 19. Re3 Na5 20. Qg6 hxg5 21. Rh3 Rfc8 22. Re1 Black resigns

    The FEN is the position after White’s 10th move.

    FEN: r1bq1rk1/pp2bppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    The process is fairly simple to do.

    1. Activate the Database function of Chess Tempo.

    2. Set the Engine Analysis to Stockfish and the “# Lines” to 1. (This speeds up the engine analysis process enormously.)

    3. Alter the ORIGINAL POSITION FEN to move 1 piece to a new location. Enter that FEN for the position into the board, using the “2nd from the right” button (looks like a COPY clipboard icon) below the board diagram. That button has the label “Setup position from user supplied FEN or move list.”

    4. Start the Engine with the “GO” button.

    5. Allow the Engine to analyze until “D25” (or greater) or until the evaluation stabilizes. The “D25” represents the depth of search and is located on the immediate left of the move sequence.

    6. Stop the Engine with the “STOP” button and record the evaluation for that changed piece position.

    7. Lather, rinse and repeat for as many piece position changes as you think feasible.

    I didn’t scrupulously attempt to move every piece to every possible empty square on the board. There are some “artifacts” that I will discuss after the list of FEN positions in which I changed one piece position.

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  2. Robert CobleThursday, June 27, 2024 at 2:37:00 PM GMT+2

    PART II:

    The baseline score is based on the position as it is without any fiddling of pieces.

    #1: ORIGINAL POSITION = -0.14 r1bq1rk1/pp2bppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    The remaining scores are for moving ONE PIECE from its original square to a different square without regard to the move(s) required to get from square A to B.

    #2: BB(e7)h8 = -0.92
    r1bq1rkb/pp3ppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #3: BB(e7)d6 = -0.13
    r1bq1rk1/pp3ppp/2nbp3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #4: BB(e7)f6 = +0.22
    r1bq1rk1/pp3ppp/2n1pb2/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #5: BB(e7)b4 = +2.22
    r1bq1rk1/pp3ppp/2n1p3/3n4/1bBP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #6: BB(e7)c7 = -0.04
    r1bq1rk1/ppb2ppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #7: BN(d5)f6 = 0.00
    r1bq1rk1/pp2bppp/2n1pn2/8/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #8: BN(d5)c7 = -0.13
    r1bq1rk1/ppn1bppp/2n1p3/8/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #9: BN(d5)b6 = +4.32
    r1bq1rk1/pp2bppp/1nn1p3/8/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #10: BN(d5)b4 = -0.34
    r1bq1rk1/pp2bppp/2n1p3/8/1nBP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #11: BN(c6)a5 = +4.61
    r1bq1rk1/pp2bppp/4p3/n2n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #12: BN(c6)b4 = -0.19
    r1bq1rk1/pp2bppp/4p3/3n4/1nBP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #13: BQ(d8)d6 = -0.30
    r1b2rk1/pp2bppp/2nqp3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #14: BQ(d8)d7 = -0.27
    r1b2rk1/pp1qbppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #15: BQ(d8)c7 =-0.05
    r1b2rk1/ppq1bppp/2n1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #16: BQ(d8)b6 = -0.19
    r1b2rk1/pp2bppp/1qn1p3/3n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    #17: BQ(d8)a5 = +0.41
    r1b2rk1/pp2bppp/2n1p3/q2n4/2BP4/2N2N2/PP3PPP/R1BQR1K1 b - - 2 10

    ReplyDelete
  3. Robert CobleThursday, June 27, 2024 at 2:38:00 PM GMT+2

    PART III:

    Some quick observations.

    AFAIK, this is a variation of using the “null move” concept—simply make two consecutive moves by the same side without allowing for the opponent to move.

    By arbitrarily moving one piece to a totally different square, more than one null move may have to be made. For example, #2 and #6 require at least two Black moves to get the Black Bishop from e7 to the “new” square.

    The scores for some of the “new” positions are skewed by the fact that in the “new” position, an immediate gain of material can be made, i.e., for example, #5 and #16.

    It is fascinating to “SEE” how changing just one piece can provide insight into the effect of important pieces and their location(s), and how that affects the evaluation of a position!

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