1nbq1k1r/r2p1p2/1p2P1p1/P6p/1Pp3n1/B1N1P2N/P2Q1PPP/R3KB1R w KQ - 0 15
FEN state: 1nbq1k1r/r2p1p2/1p2P1p1/P6p/1Pp3n1/B1N1P2N/P2Q1PPP/R3KB1R w KQ - 0 15 ; Best move: b4b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at f8 and black rook at h8. Black rook at a7, black pawn at d7 and black pawn at f7. Black pawn at b6, white pawn at e6 and black pawn at g6. White pawn at a5 and black pawn at h5. White pawn at b4, black pawn at c4 and black knight at g4. White bishop at a3, white knight at c3, white pawn at e3 and white knight at h3. White pawn at a2, white queen at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 15. White to move.