r3kb1r/p1pb4/1pn1p1p1/3qn2p/1P2PQP1/N7/PBPP1P1P/R3K2R w KQkq - 0 13
FEN state: r3kb1r/p1pb4/1pn1p1p1/3qn2p/1P2PQP1/N7/PBPP1P1P/R3K2R w KQkq - 0 13 ; Best move: e4d5
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 pawn at a7, black pawn at c7 and black bishop at d7. Black pawn at b6, black knight at c6, black pawn at e6 and black pawn at g6. Black queen at d5, black knight at e5 and black pawn at h5. White pawn at b4, white pawn at e4, white queen at f4 and white pawn at g4. White knight at a3. White pawn at a2, white bishop at b2, white pawn at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 13. White to move.