r4bnr/1b2pp1p/q1p1k3/pPPp4/2R3p1/N2BP3/1P1P1PPP/2B1K1NR w K - 2 15
FEN state: r4bnr/1b2pp1p/q1p1k3/pPPp4/2R3p1/N2BP3/1P1P1PPP/2B1K1NR w K - 2 15 ; Best move: b5a6
The current state of the chess board is: Black rook at a8, black bishop at f8, black knight at g8 and black rook at h8. Black bishop at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black queen at a6, black pawn at c6 and black king at e6. Black pawn at a5, white pawn at b5, white pawn at c5 and black pawn at d5. White rook at c4 and black pawn at g4. White knight at a3, white bishop at d3 and white pawn at e3. White pawn at b2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White bishop at c1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 15. White to move.