r5kr/pppb3p/2n1pp2/3p2p1/1qBPPPn1/B1P5/5QPP/RN2K1NR w - - 0 21
FEN state: r5kr/pppb3p/2n1pp2/3p2p1/1qBPPPn1/B1P5/5QPP/RN2K1NR w - - 0 21 ; Best move: c3b4
The current state of the chess board is: Black rook at a8, black king at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black bishop at d7 and black pawn at h7. Black knight at c6, black pawn at e6 and black pawn at f6. Black pawn at d5 and black pawn at g5. Black queen at b4, white bishop at c4, white pawn at d4, white pawn at e4, white pawn at f4 and black knight at g4. White bishop at a3 and white pawn at c3. White queen at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, 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.