I am a real esate broker in Ohio, and I can say that I have had several situations within my office where buyers have backed out of contracts. In the market we are currently experiencing, the seller is a bit more likely to take action against the buyer than in the past. In the past I have seen as little as nothing done, and as much as taking the buyer to court. The court systems always seem to award the seller the earnest money, but I have not seen any moe than that. I do not believe there is a case in Ohio where the buyer was forced to buy a home under the specific performance rule. I have seen the seller forced into selling, but never a buyer forced into buying.
Bottom line: You can not force a buyer to buy. It is possible to sue for damages, lost market time, specific performance, etc, but it seems that the courst have not been very strong on this and simply award the earnest money to the seller.
I am not dispensing legal advice here, and I would certainly consult with an attorney on this matter. Belos is a link to the possible remedies of contract breach in the state of OH.