r1b2kn1/p2p2pr/1p3q1p/1Qp1pp2/1PBPP2P/b7/PBP2PP1/R3K1NR w KQ - 4 18
FEN state: r1b2kn1/p2p2pr/1p3q1p/1Qp1pp2/1PBPP2P/b7/PBP2PP1/R3K1NR w KQ - 4 18 ; Best move: b2a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8 and black knight at g8. Black pawn at a7, black pawn at d7, black pawn at g7 and black rook at h7. Black pawn at b6, black queen at f6 and black pawn at h6. White queen at b5, black pawn at c5, black pawn at e5 and black pawn at f5. White pawn at b4, white bishop at c4, white pawn at d4, white pawn at e4 and white pawn at h4. Black bishop at a3. White pawn at a2, white bishop at b2, white pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 4. Full move number is 18. White to move.