rnb4r/1p1k4/p2bp1pp/2p3P1/P1p3n1/1P5P/1B1P2B1/RN2K1NR b KQ - 2 21
FEN state: rnb4r/1p1k4/p2bp1pp/2p3P1/P1p3n1/1P5P/1B1P2B1/RN2K1NR b KQ - 2 21 ; Best move: g4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at h8. Black pawn at b7 and black king at d7. Black pawn at a6, black bishop at d6, black pawn at e6, black pawn at g6 and black pawn at h6. Black pawn at c5 and white pawn at g5. White pawn at a4, black pawn at c4 and black knight at g4. White pawn at b3 and white pawn at h3. White bishop at b2, white pawn at d2 and white bishop at g2. White rook at a1, white knight at b1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 2. Full move number is 21. Black to move.