1r2kr2/1p2pp1p/pP4p1/8/n1p2Pbn/N1Pq4/1B2P2P/R1Q1KB1R b K - 1 20
FEN state: 1r2kr2/1p2pp1p/pP4p1/8/n1p2Pbn/N1Pq4/1B2P2P/R1Q1KB1R b K - 1 20 ; Best move: d3e4
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at f8. Black pawn at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at a6, white pawn at b6 and black pawn at g6. Black knight at a4, black pawn at c4, white pawn at f4, black bishop at g4 and black knight at h4. White knight at a3, white pawn at c3 and black queen at d3. White bishop at b2, white pawn at e2 and white pawn at h2. White rook at a1, white queen at c1, white king at e1, white bishop at f1 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.