r1b5/pp1qn2r/n2bkp1p/2p1p1p1/PPPpP1P1/7B/R2PKP1P/1NBQ2NR w - - 3 20
FEN state: r1b5/pp1qn2r/n2bkp1p/2p1p1p1/PPPpP1P1/7B/R2PKP1P/1NBQ2NR w - - 3 20 ; Best move: b4c5
The current state of the chess board is: Black rook at a8 and black bishop at c8. Black pawn at a7, black pawn at b7, black queen at d7, black knight at e7 and black rook at h7. Black knight at a6, black bishop at d6, black king at e6, black pawn at f6 and black pawn at h6. Black pawn at c5, black pawn at e5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at c4, black pawn at d4, white pawn at e4 and white pawn at g4. White bishop at h3. White rook at a2, white pawn at d2, white king at e2, white pawn at f2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 20. White to move.