r2qk3/1pp2pbr/p2Pp1pn/2R5/P1P1P2p/3PN2b/3K1P1P/1NBQ1B1R w q - 4 18
FEN state: r2qk3/1pp2pbr/p2Pp1pn/2R5/P1P1P2p/3PN2b/3K1P1P/1NBQ1B1R w q - 4 18 ; Best move: d6c7
The current state of the chess board is: Black rook at a8, black queen at d8 and black king at e8. Black pawn at b7, black pawn at c7, black pawn at f7, black bishop at g7 and black rook at h7. Black pawn at a6, white pawn at d6, black pawn at e6, black pawn at g6 and black knight at h6. White rook at c5. White pawn at a4, white pawn at c4, white pawn at e4 and black pawn at h4. White pawn at d3, white knight at e3 and black bishop at h3. White king at d2, white pawn at f2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 18. White to move.