[%c_effect e4;square;e4;type;GreatFind;persistent;true] It's necessary to capture White's bishop while there's still time, otherwise the pair of bishops guarantees a lasting positional advantage.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. c1d2  5... c7c5  6. a2a3  6... b4c3  7. d2c3 