1rb2k1r/p1p1b2p/1B2pp1n/2np3P/qp3P2/NPPP2pR/1R2P1P1/1Q2KBN1 w - - 4 17
FEN state: 1rb2k1r/p1p1b2p/1B2pp1n/2np3P/qp3P2/NPPP2pR/1R2P1P1/1Q2KBN1 w - - 4 17 ; Best move: b3a4
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black bishop at e7 and black pawn at h7. White bishop at b6, black pawn at e6, black pawn at f6 and black knight at h6. Black knight at c5, black pawn at d5 and white pawn at h5. Black queen at a4, black pawn at b4 and white pawn at f4. White knight at a3, white pawn at b3, white pawn at c3, white pawn at d3, black pawn at g3 and white rook at h3. White rook at b2, white pawn at e2 and white pawn at g2. White queen at b1, white king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 17. White to move.