r1bkn1n1/pp1p4/2qPpr2/2p4p/P2Ppp1P/2N1N2R/1PP3P1/R1B1KB2 w Q - 1 21
FEN state: r1bkn1n1/pp1p4/2qPpr2/2p4p/P2Ppp1P/2N1N2R/1PP3P1/R1B1KB2 w Q - 1 21 ; Best move: e3c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black knight at e8 and black knight at g8. Black pawn at a7, black pawn at b7 and black pawn at d7. Black queen at c6, white pawn at d6, black pawn at e6 and black rook at f6. Black pawn at c5 and black pawn at h5. White pawn at a4, white pawn at d4, black pawn at e4, black pawn at f4 and white pawn at h4. White knight at c3, white knight at e3 and white rook at h3. White pawn at b2, white pawn at c2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.