rnb3nr/pp1ppk1p/2p2p2/4q1b1/1B1P2P1/N3p2P/P1P3B1/1R1QK1NR w K - 0 13
FEN state: rnb3nr/pp1ppk1p/2p2p2/4q1b1/1B1P2P1/N3p2P/P1P3B1/1R1QK1NR w K - 0 13 ; Best move: d4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at e7, black king at f7 and black pawn at h7. Black pawn at c6 and black pawn at f6. Black queen at e5 and black bishop at g5. White bishop at b4, white pawn at d4 and white pawn at g4. White knight at a3, black pawn at e3 and white pawn at h3. White pawn at a2, white pawn at c2 and white bishop at g2. White rook at b1, white queen at d1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 13. White to move.