1n2kb2/r3n1pr/1pp2p1p/1q1p4/1pP1PP2/6B1/P2Qb1P1/R3KBNR w - - 0 21
FEN state: 1n2kb2/r3n1pr/1pp2p1p/1q1p4/1pP1PP2/6B1/P2Qb1P1/R3KBNR w - - 0 21 ; Best move: c4b5
The current state of the chess board is: Black knight at b8, black king at e8 and black bishop at f8. Black rook at a7, black knight at e7, black pawn at g7 and black rook at h7. Black pawn at b6, black pawn at c6, black pawn at f6 and black pawn at h6. Black queen at b5 and black pawn at d5. Black pawn at b4, white pawn at c4, white pawn at e4 and white pawn at f4. White bishop at g3. White pawn at a2, white queen at d2, black bishop at e2 and white pawn at g2. White rook at a1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.