World-class chess is largely a celebration of great moves (Topalov-Shirov: 47…Bh3!!!).

For most of us, though, it’s a series of decent moves punctuated by total stinkers.

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Boldi (1750) – Slater (2130). Here I found a powerful calculation: 21…Qf6 22.Rf3 Qxd4! 23.Qxd4 Re1+!! winning the queen on d4! [Psst: Derek, you gave up your queen too. So you’re down a rook.]—Right! I know! I’m so tricky, Re1+ removes the guard because of the back rank—wait, what?

And here’s Slater – Timofeyev (1960).

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Ha ha, Rxd6! and if 29…Rc8 attacking my queen, I can just go 30.Nf6+ with discovered attack on your queen! [Psst, Derek, 30…Qxf6 moves the queen.] Right, and then… and then… [by sheer luck the Rc8 hangs but I didn’t see this sequence.]

Don’t worry. It’s just rust. It’s not a pattern now that you’re…um… let’s say “comfortably over 40”.