1rq1k2r/4p1b1/np1p2Nn/p2B2pp/3p1Pp1/NPP1P3/P5PP/1RB1K2R b K - 1 20
FEN state: 1rq1k2r/4p1b1/np1p2Nn/p2B2pp/3p1Pp1/NPP1P3/P5PP/1RB1K2R b K - 1 20 ; Best move: d4e3
The current state of the chess board is: Black rook at b8, black queen at c8, black king at e8 and black rook at h8. Black pawn at e7 and black bishop at g7. Black knight at a6, black pawn at b6, black pawn at d6, white knight at g6 and black knight at h6. Black pawn at a5, white bishop at d5, black pawn at g5 and black pawn at h5. Black pawn at d4, white pawn at f4 and black pawn at g4. White knight at a3, white pawn at b3, white pawn at c3 and white pawn at e3. White pawn at a2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at c1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.