r1b1k2r/3pqppp/n4b1n/pppP4/2P1p2P/1Q2P2R/PB1K1PB1/3N2N1 b kq - 3 21
FEN state: r1b1k2r/3pqppp/n4b1n/pppP4/2P1p2P/1Q2P2R/PB1K1PB1/3N2N1 b kq - 3 21 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at d7, black queen at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at a6, black bishop at f6 and black knight at h6. Black pawn at a5, black pawn at b5, black pawn at c5 and white pawn at d5. White pawn at c4, black pawn at e4 and white pawn at h4. White queen at b3, white pawn at e3 and white rook at h3. White pawn at a2, white bishop at b2, white king at d2, white pawn at f2 and white bishop at g2. White knight at d1 and white knight at g1. Black kingside and black queenside castles are available. Half move number is 3. Full move number is 21. Black to move.