rnb1qb1r/p1k1p3/2pp3p/1QP2pp1/5NP1/4PP2/PP1P1N1P/R1B1KB1R w KQ - 0 13
FEN state: rnb1qb1r/p1k1p3/2pp3p/1QP2pp1/5NP1/4PP2/PP1P1N1P/R1B1KB1R w KQ - 0 13 ; Best move: b5a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black king at c7 and black pawn at e7. Black pawn at c6, black pawn at d6 and black pawn at h6. White queen at b5, white pawn at c5, black pawn at f5 and black pawn at g5. White knight at f4 and white pawn at g4. White pawn at e3 and white pawn at f3. White pawn at a2, white pawn at b2, white pawn at d2, white knight at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 13. White to move.