2b4r/r1p1Bk2/pp4pb/nP3p1p/2P1p2P/P2P3N/1R1QPnP1/1N2KB1R w K - 3 21
FEN state: 2b4r/r1p1Bk2/pp4pb/nP3p1p/2P1p2P/P2P3N/1R1QPnP1/1N2KB1R w K - 3 21 ; Best move: e7g5
The current state of the chess board is: Black bishop at c8 and black rook at h8. Black rook at a7, black pawn at c7, white bishop at e7 and black king at f7. Black pawn at a6, black pawn at b6, black pawn at g6 and black bishop at h6. Black knight at a5, white pawn at b5, black pawn at f5 and black pawn at h5. White pawn at c4, black pawn at e4 and white pawn at h4. White pawn at a3, white pawn at d3 and white knight at h3. White rook at b2, white queen at d2, white pawn at e2, black knight at f2 and white pawn at g2. White knight at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 3. Full move number is 21. White to move.