![]() Both options are favourable for black, value-wise. But with Rxe5, only two threats remain for white: capture the queen with Rxf5 or capture the rook with dxe5. The weak point of whites manoeuver is that he hasn't captured something during his previous move. Since h5 is still protected the black king is still safe enough. Total cost of this manoeuver: +5 +3 -/-5 so black gains a full piece. So black has to answer with a manoeuver of himself. Especially since black has two undeveloped pieces (Ra8 and Bc8) so effectively he plays with a piece less. The price he pays though is giving up h5, his king safety, and a lot of invasion points for white to use. It's very tempting for white to rely on his +6 points (Rp) advantage and to save his queen. In stead of that he introduces two new threats: 3.Rxf5 and Bxh5. Nxg6 2.Qe3 white abstain from the positive cashing in with 2.Qxf5 Bxf5 3.Rxf5. The problem with cashing in a capture is that it hands over the initiative. If black cashes in the queen now the score becomes +5 (g6) -/-4 (f5) +3 (e5) = +4 for black (RRN vs Q). So black too must not play his most direct move 2. His knight is both pinned against the rook and outnumbered. Qe6 to get out of the way of the white rook and white plays 3.Bxh5 than all of a sudden black is in all sorts of problems. Can he improve on that by postponing the direct captures while maintaining the initiative? The sequence of direct captures of both sides leads to a -/-2 disadvantage for white. If you look at other captures that black can make, it soon becomes evident that he cannot improve on the given line. So the most logical sequence of capturing leads to an advantage of +5-3=+2 (the exchange) for black. ![]() Qxf5 Bxf5 Rxf5 leads to a cost of -3 (a bishop) for white. The knight on f4 was shielding the black queen. After the gain, the initiative is handed over to white. That moves gains a value of +5 (a whole rook) since white is outnumbered on g6. This means that the first capture that must be considered is Nxg6. There is a natural hierchy of captures: the captures where a piece of low value is traded against a piece of high value first. In the diagram above, mating the king or promoting a pawn is clearly not the theme. This means that we first must have an idea about the direct moves, before we can study the indirect ones. Every postponing of the cashing in of a tactic is based on the initiative. In order to get more favourable circumstances. The actual capture is delayed by postponing it. The latter are highly dependend of the initiative. There are moves that are directly related to these three methods and there are moves that are only indirectly related to these three goals. How do we win with a tactic? There are three ways: I soon realized that the problems were caused by the fact that to different types of moves are mixed up. That might be something than can be easely calculated by a computer, but my brain has problems with that. The more forceful the move, the higher in the hierarchy. First I tried to apply some ideas like CCT in relation to the value of the pieces.
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