Note: this is a business law question

Suppose that the claimants agreed to purchase from the defendants "22,000 standards of softwood goods of fair specification in 1930." The contract contained an option to buy a further 100,000 standards in 1931. The 1930 transaction took place and the sellers supplied 100,000 standards of hardwood goods of superior specification in place of 100,000 standards of softwood goods of fair specification. The plaintiffs rejected the delivery and sued the defendants for breach of contract. How would the following have impacted the likelihood of the plaintiffs prevailing:

[1] There was a world-wide shortage of softwood goods and, for almost all uses, hardwood goods are a substitute for softwood goods. In the use that the plaintiff intended, that substitution would have posed no problems.

[2] There was no world-wide shortage of softwood goods but the softwood good harvest of the defendant was very low due to the outbreak of forest fires. Although, for almost all uses, hardwood goods are a substitute for softwood goods, the use that the plaintiff intended strictly required softwood goods.