1.
[
{B:2N3BK/6p1/5P1k/6p1/6PP/p7/b7/2r5}
{V:This time, white to play and draw. Try your answer on the board.;c8e7;Correct;Incorrect.;White is not only down on material, but in addition Black has a passed a-pawn which is guaranteed to carry the day if White lets up the pressure for an instant. The main thing working in White's favor is that Black's king is poorly placed. White's second and third moves are the key to the study. The second move is a surprise because White turns down an obvious capture, while
the third move is a forcing sacrifice.}]

2.
[
Once again we have a tactical free-for-all, with virtually every imaginable element being introduced during the six moves of the solution. Mate, stalemate, underpromotion, sacrifices - all play their part in creating a impression of enormous energy.]

3.
[
{S:c8e7}
1 Ne7!
A process of elimination leads to this move. The alternatives 1 Bxa2? Rxc8+ 2 Bg8 a2, 1 f7? Rxc8 and 1 hxg5+? Kxg5 2 Bxa2 Kxf6 3 Nb6 Rc2 are all hopeless, the last because Black quickly wins the bishop for the a-pawn.]

4.
[
{S:a2g8}
1...Bxg8
Black has no time for 1...gxh4 because after 2 fxg7 White's g7-pawn is decisive, while 1...gxf6? allows mate in two by 2 Nf5+ Kg6 3 h5. The capture on g8 appears very strong, because after 2 Nxg8+? Kg6 3 h5+ Kf7 4 fxg7 Rc8 5 h6 Black has an attractive win by 5...a2 6 h7 Rf8! 7 gxf8Q+ Kxf8 8 Nf6 Kf7, and next move 9...a1Q+ will force mate.]

5.
[
{S:h4h5}
2 h5!!
The solution to the dilemma is to ignore Black's bishop, and concentrate on creating threats against Black's king. This move threatens mate on f5 or g8.]

6.
[
{S:g8e6}
2...Be6
The only move, since 2...Bh7 loses to 3 fxg7 Rc8+ (or else 4 g8N+ mates) 4 Nxc8 a2 5 Nd6 followed by mate. After 2...Be6, the obvious continuation is again 3 fxg7, but then Black wins by 3...Rc8+! 4 Nxc8 a2 5 Nd6! Bxg4 (not 5...a1Q 6 Nf7+ Bxf7 stalemate) 6 Nf7+ Kxh5 7 g8Q a1Q+ 8 Qg7 (8 Kh7 Bf5+) Qa8+ 9 Qg8 Qxg8+ 10 Kxg8 Be6, followed by exchanging pieces on f7 and promoting the g-pawn. At this point it is worth stopping to work out how White proceeds.]

7.
[
{S:e7g8}
3 Ng8+!!
White is playing for stalemate, so he must get rid of the knight. White was already material down in the diagram and since then he has sacrificed both his minor pieces. Amazingly, he still manages to hold his own with the aid of his three valiant pawns.]

8.
[
{S:e6g8}
3...Bxg8]

9.
[
{S:f6f7}
4 f7
This is the idea. If Black takes the pawn then White is stalemated, but on the other hand mate in one by 5 fxg8N is threatened. 4...Bh7 loses to 5 f8Q, so Black's reply is forced.]

10.
[
{S:c1c8}
4...Rc8!
Now White's number really appears to be up. After 5 fxg8Q Rxg8+ 6 Kxg8 a2 the pawn promotes, so the only chance seems to be 5 f8Q, hoping for 5...Rxf8? with stalemate. Unfortunately, this fails after 5...Be6!, and Black wins the queen without stalemating White. It is easy to imagine that if this position arose in a game, many players
would simply resign.]

11.
[
{S:f7f8}{X:f8}{P:WBf8}
5 f8B!!
We have already seen various promotions to a knight, now here is a bishop underpromotion. The threat could not be more brutal: mate in one. Just as with a queen, 5...Rxf8 is stalemate, but unlike the queen any move by the g8-bishop is also stalemate. There is only one other move ...]

12.
[
{S:c8c7}
5...Rc7
... but stalemate is unavoidable.]

13.
[
{S:f8g7}
6 Bxg7+]

14.
[
{S:c7g7}
6...Rxg7]