rqb1k1nr/4b2p/p1pp2p1/1N1Bp3/3N2p1/1Pn1P2P/P1PP1PK1/R1B4R w kq - 4 18
FEN state: rqb1k1nr/4b2p/p1pp2p1/1N1Bp3/3N2p1/1Pn1P2P/P1PP1PK1/R1B4R w kq - 4 18 ; Best move: d5c6
The current state of the chess board is: Black rook at a8, black queen at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black bishop at e7 and black pawn at h7. Black pawn at a6, black pawn at c6, black pawn at d6 and black pawn at g6. White knight at b5, white bishop at d5 and black pawn at e5. White knight at d4 and black pawn at g4. White pawn at b3, black knight at c3, white pawn at e3 and white pawn at h3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at f2 and white king at g2. White rook at a1, white bishop at c1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 18. White to move.