rn1q3r/2p2pb1/p2k1n1p/1p1pp1P1/3PP1b1/1PP5/PB3PPR/RN1QKBN1 w Q - 0 13
FEN state: rn1q3r/2p2pb1/p2k1n1p/1p1pp1P1/3PP1b1/1PP5/PB3PPR/RN1QKBN1 w Q - 0 13 ; Best move: d4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black rook at h8. Black pawn at c7, black pawn at f7 and black bishop at g7. Black pawn at a6, black king at d6, black knight at f6 and black pawn at h6. Black pawn at b5, black pawn at d5, black pawn at e5 and white pawn at g5. White pawn at d4, white pawn at e4 and black bishop at g4. White pawn at b3 and white pawn at c3. White pawn at a2, white bishop at b2, white pawn at f2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.