rn2k2r/p1p2p2/3p2pp/1p2P3/2P1P1b1/N1B3PN/PP3P1P/R1b1KQ1R b KQkq - 0 18
FEN state: rn2k2r/p1p2p2/3p2pp/1p2P3/2P1P1b1/N1B3PN/PP3P1P/R1b1KQ1R b KQkq - 0 18 ; Best move: b5b4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at f7. Black pawn at d6, black pawn at g6 and black pawn at h6. Black pawn at b5 and white pawn at e5. White pawn at c4, white pawn at e4 and black bishop at g4. White knight at a3, white bishop at c3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at f2 and white pawn at h2. White rook at a1, black bishop at c1, white king at e1, white queen at f1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 18. Black to move.