rnb2rk1/1p1p3p/2P3p1/p7/P1PP1pn1/4b1PN/3BPPBP/1R2K2R w K - 1 21
FEN state: rnb2rk1/1p1p3p/2P3p1/p7/P1PP1pn1/4b1PN/3BPPBP/1R2K2R w K - 1 21 ; Best move: c6b7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black rook at f8 and black king at g8. Black pawn at b7, black pawn at d7 and black pawn at h7. White pawn at c6 and black pawn at g6. Black pawn at a5. White pawn at a4, white pawn at c4, white pawn at d4, black pawn at f4 and black knight at g4. Black bishop at e3, white pawn at g3 and white knight at h3. White bishop at d2, white pawn at e2, white pawn at f2, white bishop at g2 and white pawn at h2. White rook at b1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. White to move.