r2q1bnr/pb2pp1p/n1p1k3/Q2p2p1/2P1P3/6P1/PP1P1P1P/RNB1KBNR w KQ - 4 13
FEN state: r2q1bnr/pb2pp1p/n1p1k3/Q2p2p1/2P1P3/6P1/PP1P1P1P/RNB1KBNR w KQ - 4 13 ; Best move: a5a3
The current state of the chess board is: Black rook at a8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at c6 and black king at e6. White queen at a5, black pawn at d5 and black pawn at g5. White pawn at c4 and white pawn at e4. White pawn at g3. White pawn at a2, white pawn at b2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 4. Full move number is 13. White to move.