rnb2bn1/pp1pk2r/4p2p/1P3p2/P1PNp1P1/6P1/3P2P1/1RBQKB1R w - - 0 18
FEN state: rnb2bn1/pp1pk2r/4p2p/1P3p2/P1PNp1P1/6P1/3P2P1/1RBQKB1R w - - 0 18 ; Best move: c1a3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at d7, black king at e7 and black rook at h7. Black pawn at e6 and black pawn at h6. White pawn at b5 and black pawn at f5. White pawn at a4, white pawn at c4, white knight at d4, black pawn at e4 and white pawn at g4. White pawn at g3. White pawn at d2 and white pawn at g2. White rook at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.