# Why does Black play Bh3+?

This puzzle on chesstempo caught my eye (we play as White):

``````[FEN "2b2rk/1p3ppp/r/p1p/3pP1Pq/1P1P/P3BPK/1RB1QR2 b - - 0 1"]

1. Bg4
``````

I reckon Black needs to try skewering the rook with the bishop that captured the pawn.

I made a wrong move. It doesn't much matter to the question, yet I wanted to show this nice way Black may mate after my mistake:

``````[FEN "2b2rk/1p3ppp/r/p1p/3pP1Pq/1P1P/P3BPK/1RB1QR2 b - - 0 1"]

1. Bg4 Bg4
2. Qg4 Kh2
3. Qh4 Kg2
4. Rg6 Kf3
5. Qg4
``````

``````[FEN "2b2rk/1p3ppp/r/p1p/3pP1Pq/1P1P/P3BPK/1RB1QR2 b - - 0 1"]

1. Bg4 Rh1
``````

I see no point to Bh3+ now, yet Black plays just that and gets the bishop captured:

``````[FEN "2b2rk/1p3ppp/r/p1p/3pP1Pq/1P1P/P3BPK/1RB1QR2 b - - 0 1"]

1. Bg4 Rh1
2. Bh3+ Rh3
``````

The king protects the rook, therefore it shan't be captured by the queen.

Why does Black play Bh3+?

• It's one of those positions where Black is just lost - There are 4 ways to save the queen all of which drop the bishop and all of which rate as about +6.6 - +6.9 to white on my version of Stockfish. In practice these are all the same evaluation. And so the reason Bh3+ was chosen was because, on the day the puzzle was set, it was that that the software on the computer being used chose. Commented Nov 23, 2020 at 11:00
• Every time you want to find a reason for a move, think of what the alternatives are. Which move can you find that is better than ...Bh3+? Commented Nov 23, 2020 at 15:12