1nb2br1/rp1p2k1/p5p1/q1p1p3/1P1P1PPp/P1N2P1P/1B2K3/RQ3BNR w - - 0 18
FEN state: 1nb2br1/rp1p2k1/p5p1/q1p1p3/1P1P1PPp/P1N2P1P/1B2K3/RQ3BNR w - - 0 18 ; Best move: b4a5
The current state of the chess board is: Black knight at b8, black bishop at c8, black bishop at f8 and black rook at g8. Black rook at a7, black pawn at b7, black pawn at d7 and black king at g7. Black pawn at a6 and black pawn at g6. Black queen at a5, black pawn at c5 and black pawn at e5. White pawn at b4, white pawn at d4, white pawn at f4, white pawn at g4 and black pawn at h4. White pawn at a3, white knight at c3, white pawn at f3 and white pawn at h3. White bishop at b2 and white king at e2. White rook at a1, white queen at b1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.