A1 and B1 are Data Pins, D20 and D19 respectively. That CPU won't work without those pins.

Thank you. I will try to repair it then.

I think just A2 - A31 are data pins. Pins A1 and B1 are damaged but are not referenced here:

http://www.pchardwarelinks.com/486pin.htm

Can you explain why A1 and B1 aren't identified or how I am reading it wrong?

I think that page is listing the logical busses, not pin numbers. So A2-A31 as in the the address bus, and D0-D31 is the data bus.

For the actual pinout you want http://www.pchardwarelinks.com/486pin2.htm , which has the pin numbers in the first column, then various processors in the other columns. So you can see that pin A1 is D20 and B1 is D19.

[This might be easier to follow: http://ps-2.kev009.com/eprmhtml/eprmx/h12203.htm
slightly unhelpfully, that doesn't say whether it's looking at the top or bottom, but I think it's top view and not pin view]

Sometimes you can place two similar pins inside the socket holes, add a little solder paste to the two missing pin surfaces and then heat gun that corner. Due to the design, it'll never be as strong as pins that were set in the silicon during manufacturing.. but it'll get you a working machine.