It is difficult to decide whether this move is a blunder or a perfect trap. It took Wesley 10 minutes to make it, so there was certainly a significant element of the latter.
1. e2e4  1... c7c6  2. b1c3 Wesley goes for the flexible Two Knights variation against the Caro-Kann. 2... d7d5  3. g1f3  3... c8g4 Melkumyan goes for the classical line. 4. h2h3  4... g4f3  5. d1f3  5... e7e6 Having exchanged his problematic light-squared bishop, Black sets up a super-solid pyramidal structure in the center. It allows him to develop his pieces to their natural squares and complete the opening smoothly. On the other hand, White's bishop pair may prove to be an asset in the long run, but it isn't simple to open up the position to maximize its potential. Moreover, the knight is not placed ideally on c3, and White usually needs to reroute it to a better square in the future. In short, both sides have something to look forward to in the ensuing middlegame. 6. f1e2 This simple developing move is probably the most popular among several reasonable options. 6... f8c5 Black takes control of the d4-square since White might want to go d2-d4 at some point. 7. e1g1  7... b8d7  8. e4d5 Typically, White doesn't release the tension in the center so early, but Wesley wants to prepare the d4-break without worrying about his opponent pushing the pawn to d4 himself. 8... c6d5  9. f1d1  9... g8f6  10. d2d4 We are about to enter the reversed Carlsbad structure, quite typical of the Caro-Kann Defense. Because both sides have some pieces on suboptimal squares, adjustments are needed; over the next few moves, Black will reroute his knight to c6, while White will bring the bishop to the b1-h7 diagonal and transfer the knight from c3 to e2. 10... c5e7  11. e2d3  11... e8g8  12. c1f4 A sensible novelty. With the bishop on f4, the position starts to resemble some lines of the London System. 12... d7b8  13. c3e2  13... b8c6  14. c2c3  14... f8e8 Black slowly prepares the e5-break. 15. d1e1 Wesley slides his rook to the e-file, preparing for the upcoming kingside battle. 15... g7g6 It is not uncommon for Black to set up a sort of a Stonewall on the light squares in this type of position. This way, he diminishes the attacking power of the light-squared bishop and covers some critical squares like f5 and h5. On the flip side, this move weakens the dark squares around the king. It also creates a hook for piece sacrifices on e6, f7, or g6. 16. e2g3  16... f6d7 A multi-purpose move, giving Black options like ...e6-e5 and ...Be7-f6/g5. 17. e1e3 This is a controversial choice of a square for the rook. White should double the rooks on the e-file, but it feels more exposed here than on e2. 17... e6e5 Melkumyan takes the bull by the horns. Instead of waiting for White to pile up his pieces on the kingside and start the attack, he opens the center, hoping to obtain active counterplay. A quiet maneuvering struggle transforms into a double-edged affair in an instant $1