Bb6-6 Bb6-7 Bb6-8 Bb6-9 - Pb3-15 Pb3-16 Pb3-17 - Qb4-1 Qb4-2 Qb4-3 Bb6-10 Bb6-11 Bb6-12 Bb6-13 Pb3-18 Pb3-19 Pb3-20 Pb3-21 Qb4-4 Qb4-5 Qb4-6 Qb4-7