Problem p01513
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Artistic Impression
Star Rating3.7

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Star Ratings
2008-08-25 02:48:54Hyperbeam1613
2009-04-06 15:57:53bumbly1561
2009-10-12 15:57:06Aleric1393
2010-01-20 08:48:20mazette1363
2011-02-18 16:59:48grom431826
2011-11-10 21:54:25Blackknight231573
2012-10-20 13:55:3110101660
2014-05-31 05:01:11Tactical5551493
2014-05-31 22:02:41chessisajedrez1743
2014-10-31 14:19:52Bisonratte1501
2015-11-30 14:48:56Garryback1679
2016-01-13 05:42:46DrNuke1256
2016-10-25 03:00:27midn1ght1653
2016-11-18 23:07:21forestfire1501
2017-05-20 19:12:26greatloser1388

2008-08-25 02:48:54Hyperbeam1613cool 
2009-07-10 15:32:29greatkid1694underrated 
2009-10-12 15:57:06Aleric1393105.5 seconds... but I still don't understand why. 
2009-10-13 06:16:36UriBlass1962the reason is that you have a decisive material advantage 
2010-01-20 08:48:20mazette1363The material advantage seems less than decisive. Just about one pawn-equivalent more. 
2010-02-06 13:45:30memo1598You are temporarily up a piece, but the opponent threatens to win it back. Instead of giving back a whole piece, you find a combo gives back a Q for R + B. 
2010-09-29 16:48:19barz1628Too sophisticated play by Black. 
2010-09-29 16:48:34barz1628◄ Position ► r2q2k1/1p1n1rbp/6p1/p2P1p2/2P1p1b1/2N1BN P1/P4PBP/2RQ1RK1 b - - 0 1 
2011-02-18 16:59:48grom431826White is up a N. 1...Bxf3 2.Bxf3 leaves Black a pawn down. So he tries 1...Ne5. This fails because at the end of the exchanges, White has R+B+N for the queen: as Uri says, a decisive advantage in material. 
2011-11-10 21:54:25Blackknight231573Awesome 
2014-05-31 05:01:41Tactical5551493almost got me. 
2014-05-31 22:03:05chessisajedrez1743The rating suggested me the move. But took me longer to notice I was ahead in material, making the N+R for Q a nice trade. 
2015-11-29 04:54:01chessisajedrez1743After a second look, IMO it's not about a simple material advantage. It's about the c+d supported hanging pawns rushing forward, specially the d5. White has only 3 pieces to block them while I have 5. 
2015-11-29 04:55:41chessisajedrez1743With only 3 pieces White can't coordinate an attack while I will be gaining space and tying up his pieces. My d5 is already worth a minor piece. 
2017-09-11 17:44:10Bisonratte1501great explanation by chessisajedrez. very underrated problem. 

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Crafty 19.19 3GHZ 5sec

1. ... Ne5
2. Nxe5
({11:+4.25} 2. Nxe5 Bxd1 3. Nxf7 Kxf7 4. Rfxd1 Bxc3 5. Rxc3 Rc8 6. Bf4 Qe7 7. Rd4 g5 $18)
({11:+1.20} 2. Nxe4 fxe4 3. Nxe5 Bxd1 4. Nxf7 Qc7 5. Rcxd1 Kxf7 6. c5 Re8 7. d6 $16)
2. ... Bxd1
3. Nxf7
({11:+4.26} 3. Nxf7 Qd7 4. Rfxd1 Qxf7 5. Nb5 Qd7 6. Bf4 Rc8 7. Nd6 Rc5 8. h3 $18)
({11:-1.13} 3. f4 Bh5 4. Nxf7 Kxf7 5. Nb5 Kg8 6. Nd4 Qd6 7. Nb5 Qd7 8. Nd4 $17)