Problem p00154
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see solution

Technical Merit
Rating1807.4
RD10.9
To Play
Statereleased
 
Artistic Impression
Star Rating3.8
Stars
Votes4

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Star Ratings
DateTacticianRatingStars
2011-08-08 00:17:48Garryback1679
2012-03-27 20:36:40grom431839
2014-08-26 14:09:11d4d5e41559
2015-12-14 03:21:15chessisajedrez1743

Comments
DateTacticianRatingComment
2010-05-22 23:11:26barz16288/3Qnk2/1p1Bp1pp/5p2/3P3q/Pp4PP/7K/8 b - - 0 1 
2011-03-28 10:13:47timoure1587why not 2.Bf4 ??? 
2011-04-29 19:04:52NumberFive1724Dunno... 
2012-03-27 20:36:40grom4318392.Bf4? removes threat Qe7+, right? After 2...Qh5, white has no threat. He has to try 3.Bd6 again which allows black a perpetual. Note also that 2.h4 gives white king some extra luft (h3 hiding place) against perpetual.  
2015-12-14 03:21:11chessisajedrez1743I missed all that @grom43 explains so well. 

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Crafty 19.19 3GHZ 5sec

1. ... Qg5
2. h4
({11:+3.16} 2. h4 Qd2+ 3. Kh3 Qxd4 4. Qxe7+ Kg8 5. Qxe6+ Kh7 6. Qf7+ Qg7 7. Qxb3 Qb7 8. Qd1 Qc6 9. Be5 Qe4 $18)
({11:-1.77} 2. a4 b2 3. h4 Qf6 4. Bxe7 Qxe7 5. Qb5 g5 6. hxg5 Qxg5 7. Qxb2 f4 8. gxf4 Qxf4+ $19)
2. ... Qf6
3. Be5
({13:+4.83} 3. Be5 Qxe5 4. dxe5 b2 5. Qb5 Nd5 6. Qxb2 g5 7. h5 Kg7 8. Qf2 f4 9. Kh3 fxg3 10. Kxg3 $18)
({12:-2.07} 3. Qd8 f4 4. Bxe7 Qxe7 5. Qxb6 fxg3+ 6. Kxg3 Qxa3 7. Qc7+ Qe7 8. Qb8 g5 9. Qxb3 Qd6+ 10. Kh3 Qxd4 11. Qf3+ Qf4 $19)