Teststellung von Eduard (on his webpage)

[Eelco de Groot]

Just to throw in some testposition, I have not tried this one myself. Eduard (Nemeth) thinks it's hard to find in Blitz even with a fast computer. The move to avoid is 37...Nc5 which Eduard thinks is not good enough to hold the position (is my interpretation) (Sorry if this was maybe posted here somewhere already, did not check that)

[d]4qr2/1p1r1p1k/1BbppPp1/4b1Pp/p1P1PN1P/Pn6/1P2RQB1/3R2K1 b - - 0 1

[peter]

Just to throw in some testposition, I have not tried this one myself. Eduard (Nemeth) thinks it's hard to find in Blitz even with a fast computer. The move to avoid is 37...Nc5 which Eduard thinks is not good enough to hold the position (is my interpretation) (Sorry if this was maybe posted here somewhere already, did not check that)

[d]4qr2/1p1r1p1k/1BbppPp1/4b1Pp/p1P1PN1P/Pn6/1P2RQB1/3R2K1 b - - 0 1

Eduard might be right.
Had no good hardware of my own free, so I borrowed a 300MN/s - SF17 at Chessify's. After some Forward- Backward in MultiPV=6 and depth 42:

Code: Select all

4qr2/1p1r1p1k/1BbppPp1/4b1Pp/p1P1PN1P/Pn6/1P2RQB1/3R2K1 b - - 0 1
Analysis by Chessify Cloud Stockfish:

1. = (0.14):  1...Lxf4 2.Dxf4 Da8 3.Lf1 Da6 4.Df2 e5 5.Lh3 Tdd8 6.Tee1 Tfe8 7.Lc7 Sc5 8.Df3 Dxc4 9.Lf1 De6 10.Dh3 Td7 11.Dxe6 Txe6 12.La5 Sxe4 13.Te3 d5 14.Lh3 d4 15.Lxe6 fxe6 16.Tee1 Kg8 17.Lb4 d3 18.Lc3 Kf8 19.Te3 d2 20.Txe4 Lxe4 21.Kf2 Lc2 22.Txd2 b5

2. +/= (0.57):  1...Dc8 2.Sd3 Sc5 3.Sxe5 dxe5 4.Txd7 Sxd7 5.Td2 Da8 6.Lf3 Tc8 7.Kh2 Kg8 8.Kg3 Tf8 9.Td6 Tc8 10.Dg1 Kh7 11.Td3 Tf8 12.Df2 Tc8 13.Td2 Kg8 14.Td6 Db8 15.Td3 Da8 16.Dg1 Tb8 17.Td6 Tc8 18.Td2 Kh7 19.Kh2 Tg8 20.Le3 b6 21.Lxb6 Sxb6 22.Dxb6 Tf8 23.Te2 Kg8 24.Kg3 Tb8 25.Dc7 Tc8 26.Dxe5 Td8 27.Te1 Da7 28.c5 Db7

3. +/- (1.20):  1...Tg8 2.Sd3 Sc5 3.Sxe5 dxe5 4.Ted2 Sxe4 5.Lxe4 Txd2 6.Dxd2 Lxe4 7.Dd7 Lf3 8.Td6 Tf8 9.Kf2 Dxd7 10.Txd7 Lc6 11.Tc7 Kg8 12.Ke1 Ta8 13.Lc5 Td8 14.Le7 Te8 15.Ke2 Ta8 16.Kd3 Tb8 17.Kd2 Ta8 18.Lc5 Td8+ 19.Ke1 Ta8 20.Ld6 e4 21.Kf1 Te8 22.Le7 Ta8 23.Kf2 Kh7 24.Lc5 Kg8 25.Ke1 e5 26.Ke2 Tb8 27.Ld6 Te8 28.Le7 Tb8 29.Ke1 Ta8 30.Kf2 Tb8 31.Ke2 Ta8

4. +- (1.62):  1...Da8 2.Sd3 Tc8 3.De3 Da6 4.Sb4 Da8 5.Lf3 Th8 6.Tc2 Dc8 7.Sd3 Da8 8.Kf2 Tg8 9.Kg2 Tf8 10.Kh3 Tg8 11.Tf2 Th8 12.Kg2 Dc8 13.Tff1 Db8 14.Kh3 Tg8 15.Tfe1 Tf8 16.Tg1 Tg8 17.Kg2 Tf8 18.Sxe5 dxe5 19.Txd7 Lxd7 20.Td1

5. +- (1.62):  1...Th8 2.Sd3 Da8 3.De3 Da6 4.Sb4 Da8 5.Lf3 Dc8 6.Sd3 Da8 7.Tc2 Da6 8.Kg2 Da8 9.Tf1 Tg8 10.Tg1 Th8 11.Td1 Tf8 12.Te1 Tb8 13.Kh3 Tf8 14.Tg1 Tg8 15.Td1 Db8 16.Tf2 Dc8 17.Tff1 Db8 18.Kg2 Te8

6. +- (1.62):  1...Td8 2.Sd3 Td7 3.Lf3 Tg8 4.De3 Dc8 5.Tg2 Da8 6.Tf2 Dc8 7.Tc2 Da8 8.Kg2 Tf8 9.Kh3 Tc8 10.Tf2 Tg8 11.Tff1 Db8 12.Tg1 Dc8 13.Kg2 Db8 14.Tge1 Te8 15.Tf1 Tf8 16.Le2 Tg8 17.Tfe1 Tf8 18.Kf1 Dc8 19.Kf2 Tg8 20.Lf3 Db8 21.Sxe5 dxe5 22.Txd7 Lxd7 23.Td1 Lc6 24.Lg2 Sd4 25.Dg3 Sb3 26.Dc3 Sd4 27.Db4 Te8 28.Td2 Kg8 29.Ke3 Da8 30.Dd6

1...Nc5 was nr.5 for quite a while, just when I wanted to copy, it fell out of the 6 best lines. Here is output after this one move single primary (1...Nc5?):

[d]4qr2/1p1r1p1k/1BbppPp1/2n1b1Pp/p1P1PN1P/P7/1P2RQB1/3R2K1 w - - 0 1

Analysis by Chessify Cloud Stockfish:

2.Sxh5 gxh5 3.Df3 Th8 4.Dxh5+ Kg8 5.Dg4 Td8 6.Tf2 Sd7 7.Tdf1 Sf8 8.h5 Td7 9.Td1 Da8 10.Lf1 Dc8 11.Le2 Th7 12.Tg2 Kh8 13.Td2 Da8 14.Lf1 Dc8 15.Tdf2 Sg6 16.Ld3 Dg8 17.Le3 Td8 18.Kf1 Tb8 19.De2 De8 20.hxg6 fxg6 21.Lf4 Ld4 22.Lxd6 Lxf2 23.Dxf2 Dd7
Tiefe: 39/87 00:03:37 53071MN
+- (2.21 ++)

So 1...Nc5? is not the only move to be avoided, but one of them it is, regards