White to play and win

There are many ways to win.

Best move for white

Black just moved d5 to d4.  If white captures the d4 pawn it is stalemate.  If it doesn't capture the d4 pawn , black pawn will become a queen. What would you do.

Beat move for white

White queen is in a good position to checkmate but he needs the help of minor pieces.  The black tries to counter but ends up with overworked piece.

Best move for white

White can check mate with Qg7. It uses interference concept.

Best move for black to checkmate white

Game played by Magnus vs Timour Bilbao 2008.

Best move for black

Magnus vs Vishy 2007 Linseed-Morelia

Best move for white

Game played by Vishy vs Magnus 2007 Linseed-Morelia

Best move for black

Taken from a video lecture of Akobian

Here the black rook and queen are in 7th rank. The are ready to attack. But one white is holding them.  How do obstruct it ?  The concept called interference is to be applied by black.

Best move for black and win

Taken from a game played Akobian.

White to move and mate in 3 or 4 moves

Taken from a video lecture of Akobian.