I left off 3 diodes; the 3 anodes are connected together and to R10. The cathode of one is connected to K4, the cathode of another to K8, and the cathode of the third is connected to one pole of the 2P switch (the other pole connects to K1).

I got the Mattel Dalla$ board game- another one with lots of parts to make it difficult to emulate. You play it with a calculator that has a COP444.