How about a6-d3(B-Q3 for those of us who grew up using descriptive).
If Black takes White’s Rook, White’s remaining Rook applies Mate. If Black’s Knight takes the Bishop, White follows with Rook takes Rook - Check, and wins the Knight.
1. Bd3 was Capablanca’s move, but Black played neither of your moves. What did Black play and how did White respond?
If I were playing Capablanca after that a6-d3 white move I would resign. But if I were getting paid by the move I guess I would try to hold on to both rooks by playing something like a8-e8 then Capa would take my knight c5-e5.
I have to admit I missed the a6-d3 move. I played too fast and chose---
1.c5xe5 - a8xa6
2.Rxa6 - Rxa6
3.Kxb3 ... and As Capablanca playing white I now have an outside passed pawn and a win is almost certain. Not nearly as certain as Samore’s first move though.
Samoore gets full credit this time because Black did resign after 1. Bd3, precisely because of Wes’ analysis. The next one’s tougher.