r1b1kbn1/pp5r/n1qp3p/2p1pppP/1NPPP1P1/PP3B2/1R1Q1P1R/2B1K1N1 b - - 3 20
FEN state: r1b1kbn1/pp5r/n1qp3p/2p1pppP/1NPPP1P1/PP3B2/1R1Q1P1R/2B1K1N1 b - - 3 20 ; Best move: c5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7 and black rook at h7. Black knight at a6, black queen at c6, black pawn at d6 and black pawn at h6. Black pawn at c5, black pawn at e5, black pawn at f5, black pawn at g5 and white pawn at h5. White knight at b4, white pawn at c4, white pawn at d4, white pawn at e4 and white pawn at g4. White pawn at a3, white pawn at b3 and white bishop at f3. White rook at b2, white queen at d2, white pawn at f2 and white rook at h2. White bishop at c1, white king at e1 and white knight at g1. Both players have exhausted their castles. Half move number is 3. Full move number is 20. Black to move.