r1bqk1n1/1pppbpp1/1P2p3/p7/4P2r/N1PP1PPp/3KQ2P/RB4NR w q - 0 15
FEN state: r1bqk1n1/1pppbpp1/1P2p3/p7/4P2r/N1PP1PPp/3KQ2P/RB4NR w q - 0 15 ; Best move: a3b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black knight at g8. Black pawn at b7, black pawn at c7, black pawn at d7, black bishop at e7, black pawn at f7 and black pawn at g7. White pawn at b6 and black pawn at e6. Black pawn at a5. White pawn at e4 and black rook at h4. White knight at a3, white pawn at c3, white pawn at d3, white pawn at f3, white pawn at g3 and black pawn at h3. White king at d2, white queen at e2 and white pawn at h2. White rook at a1, white bishop at b1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 15. White to move.