1rbq1kn1/3r4/5p1p/pBp1pPpQ/Pn2P3/B1P4P/3P2PN/RN2K2R w - - 0 21
FEN state: 1rbq1kn1/3r4/5p1p/pBp1pPpQ/Pn2P3/B1P4P/3P2PN/RN2K2R w - - 0 21 ; Best move: c3b4
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black king at f8 and black knight at g8. Black rook at d7. Black pawn at f6 and black pawn at h6. Black pawn at a5, white bishop at b5, black pawn at c5, black pawn at e5, white pawn at f5, black pawn at g5 and white queen at h5. White pawn at a4, black knight at b4 and white pawn at e4. White bishop at a3, white pawn at c3 and white pawn at h3. White pawn at d2, white pawn at g2 and white knight at h2. White rook at a1, white knight at b1, white king at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.