rnb2r2/ppkp3p/4p2n/b4pp1/N1p1P1P1/4K2P/1PPPB2R/1RBQ2N1 w - - 4 15
FEN state: rnb2r2/ppkp3p/4p2n/b4pp1/N1p1P1P1/4K2P/1PPPB2R/1RBQ2N1 w - - 4 15 ; Best move: b2b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at f8. Black pawn at a7, black pawn at b7, black king at c7, black pawn at d7 and black pawn at h7. Black pawn at e6 and black knight at h6. Black bishop at a5, black pawn at f5 and black pawn at g5. White knight at a4, black pawn at c4, white pawn at e4 and white pawn at g4. White king at e3 and white pawn at h3. White pawn at b2, white pawn at c2, white pawn at d2, white bishop at e2 and white rook at h2. White rook at b1, white bishop at c1, white queen at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. White to move.