|Kobaidse - Zereteli, Tbilissi 1970. Black to move|
However, White's most direct approach to win the Na8 fails: after
1. ... Na8
2. Bc8 threatening Bb7 to win the Knight. However, Black can now play
2. ... Ke8! this forces White's Bd8 off the a5-d8 diagonal, after which Black's Knight can escape safely via c7. The game should quickly end in a draw.
However, after 1. ... Na8, White has a much stronger move than Bc8. If White plays 2. Bh5+!, Black's position is hopeless:
|Analysis Diagram after 1. ... Na8 2. Bh5+!|
So it is clear that Black's most obvious attempt to save the position by playing Na8 does not work. Therefore, he came up with a much more radical solution, a solution that I didn't find when I analyzed the position. Black played
1. ... Ke8!! Black simply leaves the Knight en prise
2. Bxb6 Ke7!!
This results in the following position:
|This position is - remarkably - drawn|
In the diagram position, Black simply moves his Bishop back and forth between b4 and e1, and there's no way how White can improve his position. A remarkable position indeed.
I found this example not just interesting in itself, but I was also intrigued by the fact that I did not find the solution on my own. Admittedly I didn't spend too much time on this, but typically when I fail to solve a chess puzzle, it's because I can not solve all the calculations involved. In other words, I fail tactically. In this case I failed strategically because I didn't see the idea of trapping White's Bishop. In other words I failed strategically.