So white is winning this, but Belov did not find Qd6.
SF excels in such positions, I knew it.
Btw., for anyone wanting to check the theory how 2 queens perform in relation to 1 queen, a reasonable test would be to give first 50cps bonus to the queens, and then 50cps penalty. One of the values should perform better, if there is a distinction, otherwise you simply stay with the normal values.
Of course, the second queen bonus or penalty could be applied also to a 3rd queen.
People that want to know if a second Queen is worth less than the first should play games between identical and equally strong opponents, starting from quite positions with a 2Q vs Q + other-material imbalance, and measure how the average result changes upon deleting the first pair of opposing Queens.
They won't learn anything from messing with the material evaluation of 2 Queens, as no matter how you set it, 2 Queens will only occur in less than 0.1% of all games that are not yet completely decided. So that you would need a billion games or more to see any difference with statistical significance.
