r3kb2/p2p1pp1/5r1n/2P2p1p/1pb1q3/BPP4P/PR1NN1P1/4KBR1 w q - 0 21
FEN state: r3kb2/p2p1pp1/5r1n/2P2p1p/1pb1q3/BPP4P/PR1NN1P1/4KBR1 w q - 0 21 ; Best move: d2e4
The current state of the chess board is: Black rook at a8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at d7, black pawn at f7 and black pawn at g7. Black rook at f6 and black knight at h6. White pawn at c5, black pawn at f5 and black pawn at h5. Black pawn at b4, black bishop at c4 and black queen at e4. White bishop at a3, white pawn at b3, white pawn at c3 and white pawn at h3. White pawn at a2, white rook at b2, white knight at d2, white knight at e2 and white pawn at g2. White king at e1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.