r1bqk1n1/pp2pp1r/nQp1N1p1/3p4/6Pp/N1P1bP2/PP1P3P/R1B2RK1 w q - 0 13
FEN state: r1bqk1n1/pp2pp1r/nQp1N1p1/3p4/6Pp/N1P1bP2/PP1P3P/R1B2RK1 w q - 0 13 ; Best move: b6e3
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 a7, black pawn at b7, black pawn at e7, black pawn at f7 and black rook at h7. Black knight at a6, white queen at b6, black pawn at c6, white knight at e6 and black pawn at g6. Black pawn at d5. White pawn at g4 and black pawn at h4. White knight at a3, white pawn at c3, black bishop at e3 and white pawn at f3. White pawn at a2, white pawn at b2, white pawn at d2 and white pawn at h2. White rook at a1, white bishop at c1, white rook at f1 and white king at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.