r3k2r/2p1ppb1/p2p3p/nq3P1n/1pP1P3/3Q2R1/PPNP2P1/R1B1KBN1 w Qkq - 4 17
FEN state: r3k2r/2p1ppb1/p2p3p/nq3P1n/1pP1P3/3Q2R1/PPNP2P1/R1B1KBN1 w Qkq - 4 17 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black pawn at c7, black pawn at e7, black pawn at f7 and black bishop at g7. Black pawn at a6, black pawn at d6 and black pawn at h6. Black knight at a5, black queen at b5, white pawn at f5 and black knight at h5. Black pawn at b4, white pawn at c4 and white pawn at e4. White queen at d3 and white rook at g3. White pawn at a2, white pawn at b2, white knight at c2, white pawn at d2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. White queenside, black kingside and black queenside castles are available. Half move number is 4. Full move number is 17. White to move.