Chess is a good way to learn, to keep your brain fit and the ego in check.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "White player"]
[Black "Black player"]
[Result "*"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/k1P5/P2r2q1/1K6/8/8/7Q/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Promotion to a Knight.|White to move and win.|A somewhat rare
opportunity to promote to a knight. } 1. c8=N+ Kb8 ( { Other moves are no
better. } 1... Ka8 2. Qh1+ Rc6 3. Qxc6+ Qxc6+ 4. Kxc6 Kb8 5. Kb6 Ka8 6. Nd6 Kb8 7. Ne8 Ka8 8. Nc7+ Kb8 9. a7+ Kc8 10. a8=Q+ { White wins with a large
material advantage. } 10... Kd7 11. Qe8+ Kd6 12. Qe6# ) 2. Qxd6+ Qxd6 3. Nxd6 Ka7 4. Ne8 Ka8 5. Kb6 Kb8 6. a7+ Kc8 7. a8=Q+ { White wins with a large material
advantage. } 7... Kd7 8. Qe4 Kc8 9. Qe7 Kb8 10. Qd8# *