1nb1qbn1/1p2p1p1/r2Pr1k1/p1p4p/1P1PPp2/6PP/P3QPB1/RNB2KNR w - - 1 18
FEN state: 1nb1qbn1/1p2p1p1/r2Pr1k1/p1p4p/1P1PPp2/6PP/P3QPB1/RNB2KNR w - - 1 18 ; Best move: b4b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at e8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at e7 and black pawn at g7. Black rook at a6, white pawn at d6, black rook at e6 and black king at g6. Black pawn at a5, black pawn at c5 and black pawn at h5. White pawn at b4, white pawn at d4, white pawn at e4 and black pawn at f4. White pawn at g3 and white pawn at h3. White pawn at a2, white queen at e2, white pawn at f2 and white bishop at g2. White rook at a1, white knight at b1, white bishop at c1, white king at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 18. White to move.