(Uses Shatranj version, K+G vs. K is mentioned in historical sources)
Note that the historical sources only mention that K + promoted Gold (= Rook) vs K is a win.
The HaChu engine allows Ln x P x Ln if no recapture is possible, which I am convinced is the historic rule. Historic sources give an example that makes it clear the situation after the capture that should be decisive ('hidden protector').
Note that the historical sources only mention that K + promoted Gold (= Rook) vs K is a win.
The HaChu engine allows Ln x P x Ln if no recapture is possible, which I am convinced is the historic rule. Historic sources give an example that makes it clear the situation after the capture that should be decisive ('hidden protector').