 A particle starts at $(0,0,0)$ in three-dimensional space. Each second, it randomly selects one of the eight lattice points a distance of $\sqrt{3}$ from its current location and moves to that point. What is the probability that, after two seconds, the particle is a distance of $2\sqrt{2}$ from its original location? 

[i]Proposed by Connor Gordon[/i]
1. **Understanding the movement**: The particle starts at \((0,0,0)\) and each second it moves to one of the eight lattice points a distance of \(\sqrt{3}\) from its current location. This means it moves by \(\pm1\) unit in each of the \(x\), \(y\), and \(z\) coordinates.

2. **Target distance**: We need to find the probability that after two seconds, the particle is a distance of \(2\sqrt{2}\) from its original location. The distance formula in three dimensions is given by:
   \[
   d = \sqrt{x^2 + y^2 + z^2}
   \]
   Setting \(d = 2\sqrt{2}\), we get:
   \[
   2\sqrt{2} = \sqrt{x^2 + y^2 + z^2}
   \]
   Squaring both sides:
   \[
   8 = x^2 + y^2 + z^2
   \]

3. **Possible coordinates**: We need to find integer solutions \((x, y, z)\) such that \(x^2 + y^2 + z^2 = 8\). The possible solutions are \((\pm2, \pm2, 0)\) and permutations thereof. This is because:
   \[
   2^2 + 2^2 + 0^2 = 4 + 4 + 0 = 8
   \]

4. **Movement analysis**: To reach \((\pm2, \pm2, 0)\) or its permutations in two moves, the particle must:
   - Move in the same direction twice in two coordinates.
   - Move in different directions in the third coordinate.

5. **Counting valid paths**: For a fixed first move, there are three possible second moves that satisfy the condition:
   - If the first move is \((1, 1, 1)\), the second move could be \((1, 1, -1)\), \((1, -1, 1)\), or \((-1, 1, 1)\).
   - Similarly, for other initial moves, there are three valid second moves.

6. **Total possible moves**: There are \(8\) possible moves in the first second and \(8\) possible moves in the second second, giving a total of \(8 \times 8 = 64\) possible paths.

7. **Probability calculation**: Since for each initial move there are \(3\) valid second moves, and there are \(8\) initial moves, the total number of valid paths is \(8 \times 3 = 24\).

8. **Final probability**: The probability is the ratio of the number of valid paths to the total number of paths:
   \[
   \text{Probability} = \frac{24}{64} = \frac{3}{8}
   \]

\(\blacksquare\)

The final answer is \( \boxed{ \frac{3}{8} } \)