Chess Puzzles | Brilliant Math & Science Wiki

Practical exercises generally fall into one of two categories: tactics and analytics.

Tactics Puzzles In tactics puzzles, a position is presented with a forcing line of play available, making the goal to find that variation. Solving such puzzles improves one's tactical vision, awareness, and pattern recognition.

When faced with such puzzles, the general strategy is to analyze the position as one would a real game, but the solver has an advantage in knowing that a tactical blow is present. It then becomes even more beneficial to organize one's calculations in the following order:

It is rarely the case that the most accurate move in a tactical puzzle does not fall in one of the above categories.

Analytics Puzzles Analytics puzzles are much more involved, asking the solver to come up with a positional plan for the next few moves. Endgames, in particular, often involve little calculation and more long-term planning. These puzzles are not as commonly seen, however, because they demand a relatively high level of skill to reasonably approach, and because their somewhat subjective nature can make a proposed plan hard to judge, they are not automatable.

The next moves to consider are captures, revealing the solution: 1. Nxd5!

Black cannot recapture the knight with his pawn on c6, as the bishop on b5 would put him in check, and his queen is under attack. When his queen moves, White will also be able to capture the knight on e4, as it will no longer be defended by Black's queen. If Black tries to avoid this by playing 1... Qe6?, White wins the game by playing 2. Nc7 (check), attacking both the king and the queen simultaneously.

In the position below, which is the strongest move for White?

1. Re7 1. Rxc8 1. Qxc7 1. Qf3

The rest is here:
Chess Puzzles | Brilliant Math & Science Wiki

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