1nbqk2r/1rp5/4p1pp/Np1pbp2/1P1Pn3/N1P2P2/P1Q3PP/1RBK1BR1 w k - 1 15
FEN state: 1nbqk2r/1rp5/4p1pp/Np1pbp2/1P1Pn3/N1P2P2/P1Q3PP/1RBK1BR1 w k - 1 15 ; Best move: d4e5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black rook at b7 and black pawn at c7. Black pawn at e6, black pawn at g6 and black pawn at h6. White knight at a5, black pawn at b5, black pawn at d5, black bishop at e5 and black pawn at f5. White pawn at b4, white pawn at d4 and black knight at e4. White knight at a3, white pawn at c3 and white pawn at f3. White pawn at a2, white queen at c2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at c1, white king at d1, white bishop at f1 and white rook at g1. Black kingside is the only castle move available. Half move number is 1. Full move number is 15. White to move.