rnb1k1n1/3p4/p2qppr1/P5bp/1pP4P/B2PPN1R/R1PNQP2/3K1B2 b q - 4 20
FEN state: rnb1k1n1/3p4/p2qppr1/P5bp/1pP4P/B2PPN1R/R1PNQP2/3K1B2 b q - 4 20 ; Best move: g5e3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at d7. Black pawn at a6, black queen at d6, black pawn at e6, black pawn at f6 and black rook at g6. White pawn at a5, black bishop at g5 and black pawn at h5. Black pawn at b4, white pawn at c4 and white pawn at h4. White bishop at a3, white pawn at d3, white pawn at e3, white knight at f3 and white rook at h3. White rook at a2, white pawn at c2, white knight at d2, white queen at e2 and white pawn at f2. White king at d1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 4. Full move number is 20. Black to move.