r3kb1r/qp2pp2/p2p2p1/P1pn3p/2P2Pb1/N2PB1PP/P1Q1P3/2R1KBNR b q - 12 20
FEN state: r3kb1r/qp2pp2/p2p2p1/P1pn3p/2P2Pb1/N2PB1PP/P1Q1P3/2R1KBNR b q - 12 20 ; Best move: d5e3
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at h8. Black queen at a7, black pawn at b7, black pawn at e7 and black pawn at f7. Black pawn at a6, black pawn at d6 and black pawn at g6. White pawn at a5, black pawn at c5, black knight at d5 and black pawn at h5. White pawn at c4, white pawn at f4 and black bishop at g4. White knight at a3, white pawn at d3, white bishop at e3, white pawn at g3 and white pawn at h3. White pawn at a2, white queen at c2 and white pawn at e2. White rook at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 12. Full move number is 20. Black to move.