The problem is that the I.D. cannot precisely implement te Bishop adjustment rule. It is possible to equip Bishops with an initial sideway friendly swap (isudW), and even possible by some scripting to require the partner has not moved. But it is not possible to revoke the move on one Bishop when the other makes it.
The problem is that the I.D. cannot precisely implement te Bishop adjustment rule. It is possible to equip Bishops with an initial sideway friendly swap (isudW), and even possible by some scripting to require the partner has not moved. But it is not possible to revoke the move on one Bishop when the other makes it.