rn3qnr/2pkp2p/1p3ppb/Q2p1b2/PP1P4/N2NB3/R1P1PPPP/4KB1R b K - 0 13
FEN state: rn3qnr/2pkp2p/1p3ppb/Q2p1b2/PP1P4/N2NB3/R1P1PPPP/4KB1R b K - 0 13 ; Best move: b6a5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at f8, black knight at g8 and black rook at h8. Black pawn at c7, black king at d7, black pawn at e7 and black pawn at h7. Black pawn at b6, black pawn at f6, black pawn at g6 and black bishop at h6. White queen at a5, black pawn at d5 and black bishop at f5. White pawn at a4, white pawn at b4 and white pawn at d4. White knight at a3, white knight at d3 and white bishop at e3. White rook at a2, white pawn at c2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.