Bxa6 (not a good idea), g3 (better), and Qg7 (actual good fighting chance) were other possibilities, but lets not get into that. Results in a completely lost position for black.
The justification for this is in move 25.a7!, you'll see. Easy for Stockfish to "see" it, not for a human player. Looks surreal to give up, kind of, the defense of the king side, very few players would even consider this, Kortschnoj didn't. So, what's Stockfish's solution to this problem? Not to defend h3 at all! Seems very reasonable and close to the only way to defend the king side, but it surrenders the battle entirely, black pieces find their way in all the same, and there's no way to stop it. At this point g4 had just been played, and Kortschnoj faced the threat of the collapse of the king side pawns barrier, especially h3 is threatened. Ok, so the “machine” can get it wrong a tiny percentage of the times, very unusual times, what about when it gets it super right, but it is almost impossible for a human player to emulate or to imitate its “reasoning”. This is a game a human player find the way to save, and "the machine" would have lost. But the fact is that material advantage is only a real advantage if it's effective to checkmate the opponent's King, which is never gonna happen here. Stockfish still doesn’t "believe" it, keeps showing winning advantage for white. I bet the player with the white pieces couldn't believe his eyes, nor could I if this had happened to me. There's nothing better for white than a draw. The only way to try to open a path for the Queen so it may attack through the h3-c8 diagonal, or else, the Queen could be useless.ģ.gxh4 4.Qd2 h3!! was played.
But it gets interesting, THERE IS a way to stop b6, is just that the “machine” can’t "see" it, but a human player did, in the actual game, Laszlo Hazai playedī6 is stopped!! Is this a good move? Stockfish keeps saying white is winning.Īfter taking the Queen, white plays h4. Stockfish shows Be1, Qa8, Kb7., these all lead to an excruciating position for the player with black’s pieces. Hot to prevent b6? There’s no way, apparently. The next game, played by actual people, for real, is a brilliant example of when the “machine” gets it wrong.īlack's turn, Stockfish is showing winning advantage for white, did you verify that? It is reasonable, the g3-bishop is worthless for black and b6 in the next move seems unavoidable, after that black’s position collapses. Long story short, these evaluation parameters aren’t flawless there are certain gaps where they simply do not apply.
It is extremely complicated, at least for me! (If you’re interested on learning more you can check out this article ) Such as material unbalance, central pawns, exposed enemy king maybe.
The engine then determines who has the advantage using evaluation functions based on mathematical algorithms and parameters. Unlike our human minds, which start considering a move based mainly on our chess knowledge, a computer chess engine can “calculate” all possibilities in any position. When we are deciding what to play in any given chess position, we consider some of our possibilities and our opponent’s probable good replies to the moves we are considering, and then we try to judge who’s better at that point we are anticipating ourselves to maybe two, three, four moves in advance: “I want to play this, then he/she could play this, and after that I have this move and I like this resulting position”.
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