2. Solve the numerical riddle

$$
\text { BLOW + BLOW = FIGHT }
$$

where different letters represent different digits.
2. Answer: $8126+8126=16252$.

It is clear that D=1 as the first digit of the five-digit sum. Consider the hundreds place. For it, $\mathrm{A}=D+D=2$, since the digit $\mathrm{A}$ is at the end of the sum, and it is even. Therefore, $\mathrm{P}+\mathrm{P}$ ends in 2, so $\mathrm{P}=6$, as the digit 1 is already occupied. Adding the last two digits gives $\mathrm{K}=5$. Finally, $\mathrm{V}=8$, since adding $\mathrm{V}+\mathrm{V}$ should result in 16. The solution is unique.