I like testpositions so I am happy to have these. I haven't run all of them but here are a couple results from Arasan at 1hr/move:
r1bqk2r/ppp1ppbp/2n3p1/3p4/2PP1B2/2P1P3/P4PPP/R2QKBNR w KQkq - 0 1 am cxd5; bm Nf3;
bm Nf3
result: cxd5 3600 seconds. score: +0.63 1757336352 nodes. ** error
cxd5 Qxd5 Bxc7 O-O Nf3 Bg4 h3 Bxf3 Qxf3 Qxf3 gxf3 Rfc8 Bf4 e5 Bg3 Na5 Rc1 exd4 e
xd4
result(2): Nf3 3600 seconds. score: +0.44 1719120709 nodes.
++ correct
Nf3 e6 cxd5 exd5 Bd3 O-O O-O Re8 Qb3 Re7 Rfe1 Rb8 Rab1 Be6 Ng5 Bg4 e4
result(3): Bg3 3600 seconds. score: +0.25 1730241131 nodes.
** error
Bg3 e6 Nf3 O-O cxd5 exd5 Bd3 Be6 O-O Qe7 Qe2 Rfe8 c4 dxc4 Bxc4 Rec8 Bf4
r5k1/7p/4p1pP/4P1P1/R3b3/8/7K/N7 w - - 0 1 am Rxe4; bm Rxa8;
bm Rxa8+
result: Rxe4 3600 seconds. score: +0.88 3219315726 nodes. ** error
Rxe4 Rxa1 Rb4 Rf1 Kh3 Rg1 Kh4 Rh1+ Kg4 Rg1+ Kf4 Rf1+ Ke4 Re1+ Kd4 Rd1+ Kc5 Rd5+
result(2): Rxa8+ 3600 seconds. score: +0.50 3193058375 nodes.
++ correct
Rxa8+ Bxa8 Nb3 Kf7 Nc5 Ke7 Kg3 Bc6 Kf4 Kf7 Nd3 Ba4 Nf2 Bc6 Ng4 Kg8 Nf6+ Kh8
result(3): Rc4 3600 seconds. score: -0.13 3207028013 nodes.
** error
Rc4 Bd5 Rc1 Ra2+ Kg3 Re2 Rc8+ Kf7 Rc7+ Kf8 Rxh7 Rxe5 Kg4 Re4+ Kg3 Re5
In both cases it is selecting the "am" move ( in the 2nd case after 3 billion nodes or so). So if these solution moves are correct they are way past my program's horizon.
--Jon
83 nice Testpositions (Long and big post).
Moderators: hgm, Rebel, chrisw
-
jdart
- Posts: 4366
- Joined: Fri Mar 10, 2006 5:23 am
- Location: http://www.arasanchess.org
-
BBauer
- Posts: 658
- Joined: Wed Mar 08, 2006 8:58 pm
Re: 83 nice Testpositions (Long and big post).
Now I see,
great position!
Thank you!
regards
Bernhard
great position!
Thank you!
regards
Bernhard
-
Marc MP
Re: 83 nice Testpositions (Long and big post).
On my Athlon 1.4 with 96M hash and 5min per move, Chess Tiger 2007 solved 39 out of 90.
Code: Select all
Engine: Chess Tiger 2007
Suite: tvasdaris.epd
Positions: 90
Time per move: 300 seconds
Language: English (PNBRQK)
Engine will use ...
setoption name Hash value 96
setoption name NalimovPath value C:\TB4mens
setoption name NalimovCache value 16
setoption name Ponder value false
setoption name OwnBook value false
setoption name NalimovDepth value 4
setoption name DrawScore value 0
setoption name Anti Human Play value false
setoption name Style value Normal
setoption name MultiVariation threshold value 100
setoption name MultiPV value 1
"time in": milliseconds
Test delay: 4 seconds
-------------------------------------------------------------------------------
Results:
<=Sec Solved Total PosNr
----- ------ ------ -----------------------------------------------------------
1 8 8 3 7 15 28 42 73 78 87
2 3 11 38 60 79
3 3 14 17 21 71
6 1 15 72
13 1 16 64
14 2 18 65 77
23 2 20 74 90
38 1 21 20
40 1 22 37
41 2 24 10 16
48 1 25 61
49 1 26 44
58 1 27 14
60 1 28 57
84 1 29 84
104 1 30 12
140 1 31 55
170 1 32 19
171 1 33 30
184 1 34 35
215 1 35 36
242 1 36 6
245 1 37 59
257 1 38 1
273 1 39 63
Failure 2 4 5 8 9 11 13 18 22 23 24 25 26 27 29 31 32 33 34 39
40 41 43 45 46 47 48 49 50 51 52 53 54 56 58 62 66 67 68 69
70 75 76 80 81 82 83 85 86 88 89
39 problems solved.
51 problems unsolved.
-------------------------------------------------------------------------------
Position results:
PosNr solved ply time last pv
----- ------ --- ------------- ------------------------------------------------
1 yes 24 [00:04:16,76] [24] +0.50 f1g2 c6g2 e3e4 f6f5 g4f5 e6f5 a6a7
f5e4 d3d4 e4e3 d4e5 g2e4 c2d1 e4f3 d1e1 c5c4
e5e6
2 no [--:--:--,--] [20] +0.44 c4d5 d8d5 f4c7 c8f5 f2f3 a8c8 c7g3
d5a5 d1d2 e8g8 e3e4 f5e6 f1d3 c6b8 g1e2 e6c4
d3c4 c8c4 e1g1
3 yes 3 [00:00:00,01] [19] +1.20 f5f4 e3f4 e4e3 g2g3 b7b5 g3h2 e8e4
a2a4 e3e2 f1g1 b5b4 g1g3
4 no [--:--:--,--] [20] +1.85 d7e7 e8d8 b7d7 d8c8 d7a7 c8b8 e7b7
b8c8 b7c7 c8b8 a7b7 b8a8 c7h7 g8c8 c3d4 h8d8
d4e4 c8c4 e4e3 c4c3 e3e4 c3c4 e4e3 c4c3 e3e4
5 no [--:--:--,--] [22] -10.20 d5a5 a2b2 f6f5 f7f8q a5b5 b2a3 b5a5
a3b3 a5b5 b3c2 b5c5 c2d2 c5d5 d2c2 d5c5 c2d2
c5d5 d2c2 d5c5 c2d2 c5d5 d2c2 d5c5
6 yes 19 [00:04:01,41] [19] +0.90 f3f6 e7f6 g5f6 g7g8 h4h7 g8h7 g3h3
h7g8 e3h6 d8c7 f2f4
7 yes 2 [00:00:00,00] [25] -1.80 d6c5 e8d7 a6d3 a7a5 c5b6 a4a3 d3b1
c6b7 d4c3 a5a4 c3b4 b7c6 b6g1 a3a2 b1a2 e5d3
b4a3 d3e1 g1b6
8 no [--:--:--,--] [23] -4.88 b8h8 h4g4 h8f8 c2c1q h2h3 g4f4 a2e6
f4e5 e6f5 c1a3 f8f7 a3f3 g2g1 e4e3 f7e7 e5d6
e7e3 f3f5 g1g2 d6d5 g2f1 d5d4
9 no [--:--:--,--] [22] -2.50 g5e4 e7e6 f5h7 a6c7 e4d6 a3d6 h7d3
f7f5 e2f3 d6c5 d4c6 d8e8 d3c4 c5d6 c6d4 e8e7
d4b5
10 yes 24 [00:00:40,69] [25] +3.36 g7g8n h6g5 g8f6 h7c2 c7a5 g5g6 a5b6
d4d3 b6e3 c2d1 f6d5 d1g4 d5f4 g6g7 f4d3 f7f6
e5d4 f6f5 e3f4 g7g6
11 no [--:--:--,--] [28] +0.84 a4e4 a8a1 e4b4 a1f1 h2g3 f1g1 g3f4
g1f1 f4e4 f1e1 e4d4 e1d1 d4c5 d1d5 c5c6 d5e5
b4b8 g8f7 b8b7 f7g8 c6d6 e5a5 d6e6 a5a6 e6e7
12 yes 19 [00:01:43,64] [21] -1.14 a2a3 f4e5 e7f6 e5f6 g7f6 d1d4 e6e5
d4h4 g8g7 c5c6 b7c6 b5c6 b4c6 c3b5 a3a6 b5c7
a6e2 c1c6
13 no [--:--:--,--] [21] -0.18 f3d3 b8a6 f1e2 a8c8 h1c1 c5d4 c3d4
c8c4 c2c3 a6c7 g3f1 a4c6 f1d2 c4a4 c3c4 d5c4
c1c4 a4c4 d3c4
14 yes 17 [00:00:57,88] [19] +0.30 b8c7 e3c5 c8e6 d5d2 h7h6 f1d1 c7a5
d2a5 c6a5 e4d6 e5d6 d1d6 a8c8 c5b6
15 yes 15 [00:00:00,50] [30] -1.05 d1c2 h4e1 g4f3 e1c3 f3e4 f6g5 c2d1
c3d4 e4f3 g5f5 d1c2 e5e4 c2e4 f5e5 e4d3 a5a4
f3e2 d4f2 e2d2 e5d4 d3e2 f2e1
16 yes 16 [00:00:40,63] [17] +2.00 d2h6 g7h6 a1g1 e6e5 d4d5 h5f4 d5c6
f4d3 c6d7 d3f2 e4f2 e8d8 f2g4
17 yes 14 [00:00:02,41] [21] +327.39 g2g7 g8g7 g1g7 f7g7 d6e7 g7g8 e7e8
g8g7 h5h6 g7h6 e8f8 h6h5 f8f7 h5h4 f7h7 h4g3
h7g8 g3h4 g8g5 h4h3 e3f2 c6c5 f2f1 c5c4 b3c4
18 no [--:--:--,--] [20] -5.14 a2b1 h8d4 e3g3 b6d6 g3d3 d6g6 b1c2
a6b5
19 yes 17 [00:02:49,60] [18] +3.82 g5f7 c6e7 d6e7 a2a1q d1a1 e8e7 d2h6
g7g8 e4g6 e7f7 g6f7 g8f7 c4f4 f7e8 h6h7 e8d8
h7g8
20 yes 15 [00:00:37,29] [18] +0.86 a8f8 g4e2 c4c3 f1f6 f7d8 a1f1 f8f6
f1f6 b2a2 f6f2 d8f7 e2f3 a2a1 f2f1
21 yes 15 [00:00:02,75] [23] +3.07 d2b2 a4c3 b2c2 c3e4 c2c1 g1f2 c4c3
f2e2 c3c2 e2d2 c1e1 e4g5 h7g6 d2c2 g6g5 b7g7
g5f6 g7g8 f6f7 g8g5 e1h1 h2h3 f7f6 g5g8 f6f7
22 no [--:--:--,--] [21] -0.08 g5f3 g8h7 f1c1 a8b6 g1h2 c8c1 d2c1
f7f5 b3c2 f5e4 c2e4 b8f8
23 no [--:--:--,--] [18] +0.68 h5e2 c8d7 e2c2 h7f8 f1f3 e8d8 b2b3
a8c8 a3b2 d7b5 e3g4 b5d3 c2d3 e7c7
24 no [--:--:--,--] [20] -0.12 c2c3 c8e8 f6g5 c6a4 c4c5 a4c6 g5h6
b6c5 d4f4 c6d7 f3g5 f7f5 e5f6 f8f7 h6g6 g8f8
g6h6 f8g8 h6h5 e6e5
25 no [--:--:--,--] [19] -2.68 h4h5 h7h8 h5g6 f7g5 f2e3 b8a8 a5a8
g8a8 e3g5 f6g5 d3f3 d7a7 f1d3 a7a3 b2c2 a3a4
c2b2 c6b7 f3f7
26 no [--:--:--,--] [21] +0.77 c6c7 f7f6 h3f1 f8e7 f1c4 e8h8 a2a3
c8b7 c1c2 b7f3 d1f1 f3e4 c4d3 e4d3 c2d3
27 no [--:--:--,--] [24] -0.13 d1h1 e8c8 h1h3 f8g8 h3g3 g8h7 c1d2
c8c6 g3g7 h7h6 g7f7 h6g6 f7a7 g6f6 d2c3 f6e6
c3c4 e6d6 a7f7 d6e6
28 yes 9 [00:00:00,04] [28] +4.34 c7d7 a8h8 d7d6 d4c4 c5c6 b7c6 d6e5
c4c5 e5e6 a7a5 a2a4 c5b4 e6f6 h8h7 f7f8q b4a4
f8c5 h7h6 f6g7 h6h3 g7g8 a4b3 c5a5
29 no [--:--:--,--] [19] -0.48 a8d8 d3d4 h3h5 d5f6 g7f6 g1g2 h5g6
f1c1 g8h7 c2e2 e5d4 e3d4 d6d5 c4c5 f8e8 e2c2
g6e4
30 yes 19 [00:02:50,53] [20] +0.36 f7f5 c7d5 f8f7 b4b5 c6e7 b5b6 e7d5
b6a7 e5e4 d3e4 f5e4 c2e4 f7f3 e4d5 g8h8 b2g7
h8g7 d5b7 f3f7
31 no [--:--:--,--] [22] -2.16 a6c5 c4c5 b5c5 c3c5 d7a4 h3g3 f7f6
g3f4 f6e5 f4e5 e7f7 e5e4 f7e6 e4d3 e6d6 c5c3
a4d7 c3c2 d7g4 c2c1 g4f5 d3c3
32 no [--:--:--,--] [37] +1.04 h2g1 h7h5 g1f1 g5f5 f1e2 f5e6 e2d3
e6d5 d3d2 d5d6 d2c3 d6e5 c3b3 e5d5 b3c2 d5e6
33 no [--:--:--,--] [24] +0.00 e8e7
34 no [--:--:--,--] [21] +1.00 e1g1 c7c5 a1d1 c5d4 c3d4 f8g6 h4h6
e7c7 c2c4 d8d4 d2c3 d4d1 e2d1 f6d7 h6h7 g8f8
c3b4 d7f6 h7g7 f6e8 g7h7
35 yes 20 [00:03:03,50] [20] +0.81 e6e5 d4e5 d8d3 e2d3 c6b5 d3d4 b6a4
e3e4 c8d8 d4e3 d8d3 e3e2 d3d5 e2e3 d5e5 f3f4
e5e6 e4e5 e7d6 e3d4 d6b8
36 yes 21 [00:03:34,58] [21] +1.40 h3f1 f6d7 b6d6 e8e1 b1b2 e1e3 c3e3
d5e5 e3e5 d7e5 f1e2 g6g5 f3f4 g5f4 g3f4
37 yes 18 [00:00:39,54] [24] +2.66 f2c5 e7e6 c5d6 a3a4 e4e3 a4a5 e3e2
b1c1 f3f2 c1d2 f4f3 a5a6 d6f4 d2d3 f4b8 d3d2
g7g6 a6a7 b8a7 e6e7
38 yes 13 [00:00:01,14] [27] +2.40 c5d6 e6d6 e4e3 c2c4 f3e2 b1c2 f4f3
c4c5 f3f2 d6d1 e2f3 c5c6 e3e2 d1d3 f3g2 c6c7
f2f1q c7c8q e2e1n c2d1 e1d3 d1d2 f1f3 c8d8
39 no [--:--:--,--] [15] -0.22 e8d7 f2d2 e4d4 d2d4 e5d4 h8h7 d7d6
h7h6 c8e6 h6f4 d6c6 f4f6 c6d7 f6d4 d7c8 d4e4
e6a2 b2b3 b8c6 h2h4
40 no [--:--:--,--] [18] +0.54 h8c8 c6b6 d2d6 b8c6 c8a8 e4e3 d6d2
c6d4 a8d8 b6a7 h2h4 d4f3 h4h5 f3d2 d8d2 e3d2
c1d2 a7b6 d2e3 b6c5 e3e4 c5d6 a2a4 b7b6 h5h6
41 no [--:--:--,--] [19] +0.64 h6e3 c5b4 d4f5 e8e6 f1d1 a8d8 e3b6
d8d7 b6d4 b7b5 c4b5 c6b5 f2g3 d6d5 d4b2
42 yes 17 [00:00:00,17] [26] +3.37 b5a4 h3h4 b6b5 h4h5 b5b4 h5h6 b4b3
h6h7 b3b2 h7h8q b2b1q f1f2 b1c2 f2f3 c2d3 f3g4
d3d1 g4g3 f7f5 h8a8 a4b5 a8b7 b5c5 b7a7 c5c4
43 no [--:--:--,--] [18] +0.24 d6c5 b6a5 c5d4 e7g6 d4c3 a5a3 f1f7
g8f7 e4d6 f7g8 d6e8 b7b6 e8g7
44 yes 19 [00:00:48,24] [22] +3.44 b7d5 c4d5 c5c4 d5d6 c7a5 c3a2 c4d3
d6e7 b4b8 d1b1 b8e8 c2d3 e8e7 b1b8 g8h7 e1c1
e7c7 a1b1 c7c1 a2c1 a5d2
45 no [--:--:--,--] [24] +2.04 b1a1 h5f4 c2c3 g6g5 g2g3 f4g6 d2c2
g6e5 h1h5 h7h6 f3f4 e5c4 h5h6 g5f4 g3f4 c4e3
c2d3 e3g2 f4f5 g8g7
46 no [--:--:--,--] [31] +0.00 d3c2 a5c6 c2d3 d7e8 h2h4 g5h4 f3h4
e8d7 h4f3 c6a5 d3c2
47 no [--:--:--,--] [16] +2.27 a7d7 e8a8 e6d8 h3e3 g1h1 c3c1 d1c1
e3c1 g2g1 c1e3 d8f7 h8g8 f7g5 f5h6 d7c6 a8f8
g5e6
48 no [--:--:--,--] [20] +1.60 e5c4 c8d7 c4e5 f6e5 e1e5 b8c8 c2b1
c8c1 b1c1 d8c8 c1b1 a6c5 b2b4 d7b5 e5e7 d4d3
d2c3
49 no [--:--:--,--] [20] +0.28 b3c2 c5e4 c2d3 b7b6 f2f3 e4g3 d3h7
g8f8 h7h8 f8e7 h8g7 g3e2 g1f2 e2f4 g7f6 e7e8
f6f4 d7b5 b2b3 c8c5 f4h6
50 no [--:--:--,--] [21] -1.60 d8d1 a1d1 a8d8 d1d8 e7d8 c3a4 f7f6
a4c5 a6c8 c2e2 c7b6 g1f1 d8e7 c5d3 b6c7 e2e1
e7d8 d3c5 d8d6 f1f2 c7b6 c5d3 b6e3 e1e3 c8e6
51 no [--:--:--,--] [20] -0.32 c3a4 f6d7 f3e5 d7e5 d4b2 a8b8 e1f1
f7f5 a4c3 c8e6 e4f5 e6f5 c3e4
52 no [--:--:--,--] [20] +0.56 g5f4 e5e7 f4h6 d7e5 h6g7 g8g7 f3f2
e5d7 g3e2 d7c5 e2d4 c5e4 c2e4 e7e4 d4b5 e4d5
b5d6 d5d2
53 no [--:--:--,--] [24] +0.41 b2b3 e6e5 d8d2 e2h5 a4a5 g7g5 b4d5
f8g7 a5a6 e8f6 d5b6 f6e4 d2d5
54 no [--:--:--,--] [19] -0.10 e8g8 e1g1 d8c7 a2a3 b4d6 d1e2 e5g6
d2b3 f6d5 c1d2 d6e5 a1b1 h7h6 f2f4 e5f6 f1f2
55 yes 19 [00:02:19,32] [20] +0.46 f5f6 e5d4 f6g7 g8g7 d1d4 g7g8 c1h6
b8c6 d4b6 d8h4 h6f4 c6e5 g2g3 h4h3 b6d6 e8d6
d5e7 g8g7 f4e5 f7f6
56 no [--:--:--,--] [20] +0.28 e2e5 b8d7 e5g7 d8f6 g7g5 f6g5 f3g5
h8g8 g5e6 f7e6 f1f4 a8c8 a1b1 c8c7 f4e4 e8f7
b1f1 d7f6 a3c5
57 yes 15 [00:00:59,30] [18] +0.85 b4d2 h7g6 d2g5 d7c6 e4c6 b7c6 f1e1
e6d5 f3g4 d5f5 g4f5 g6f5 e1e6
58 no [--:--:--,--] [19] +0.52 h5h4 c8b7 f5g7 e6g5 h4g5 e8e1 b1e1
f7f6 g5f6 d7g7 f6g7 g8g7 e1e7 g7g8 e7b7 a6c5
b7e7
59 yes 18 [00:04:04,17] [18] +1.24 h5h6 a6c5 h6f6 c5e4 e1e4 d5e4 h3g4
a8b8 f5h6 g8f8 b1d1 b8b7 f6h8 f8e7 h6f5 e7d8
h8f6 d8c7 d1d7 c8d7 f6f7
60 yes 13 [00:00:01,88] [19] +5.88 h5h6 c8b7 f5d4 a6c5 d4f3 d7d8 f6d8
a8d8 h3e6 c5e6 f3e5 d5d4 b1c1 f7f6 e5c6
61 yes 17 [00:00:47,88] [18] +2.52 c1c6 d5c6 d1d3 h8f8 d3e3 e8c8 e3e7
f8e8 e7b4 c6c2 e1e8 d8e8 h2h3 e8e2 b4a5
62 no [--:--:--,--] [20] +0.76 g2g4 h5g6 d2c4 b4e1 c4b6 c8d8 b6d7
f7d7 d1e1 g8e7 d5d6 e7c6 d6c7 d7c7 e3c5 d8d7
c1d1 d7c8
63 yes 20 [00:04:33,00] [20] +2.20 f8f3 g2f3 g6e4 f3e4 g7g3 h1g1 a3a2
g1g3 a2d2 b1f1 d2h2
64 yes 15 [00:00:12,75] [19] +1.04 a2f7 f8d8 d6d7 d3b5 e1e4 d2b4 f7c4
b5b7 c4b4 b7d7 b4e1 d8c8 e1e2 d7d5 g3g4 h8g8
a1b2
65 yes 15 [00:00:13,08] [20] +0.56 d5c4 d1g4 c4c3 b2c3 d8d6 h5h6 f8d8
g4e2 d6a3 c3b2 a3a2 h6h7 a7a6
66 no [--:--:--,--] [20] +1.14 f4b4 f6b6 b4b6 d7b6 d5d6 f8d8 d3f5
c8f5 f1f5 d8d6 f5f7 h7h8 f7c7 d6d7 c7c5 a8f8
e1e6 f8f6 e6e8
67 no [--:--:--,--] [25] +0.02 c3c4 e7d7 c4b5 c6b5 a3b5 g7f8 e3f4
e5f4 b5d4 f8b4 d4b3 h7g5 g1g2 d7c6 h2h4 g5e6
f1a6 b4a5 b3a5 c6b6
68 no [--:--:--,--] [17] +0.86 f3d2 c8d8 e2g4 f7f6 f1c1 e7c5 d5d8
f8d8 d2e4 g8f8 e4c5 b6c5 g4h5 a5b3 c1e1 b3d2
69 no [--:--:--,--] [19] -0.15 d5d6 h2g2 d6d5 g2h2 d5d6 h2g2 d6d5
g2h2 d5d6 h2g2 d6d5 g2h2 d5d6
70 no [--:--:--,--] [27] +2.06 d3e5 d6e5 e3f3 e7d6 g3g4 d6d7 g4g5
d7e7 f3e3 e7f7 e3e2 f7e8 e2d3 e8d7 d3d2 d7d6
d2e2 d6d7 e2e3 d7d6 e3f2 d6d7 f2e2 d7e7 e2d3
71 yes 18 [00:00:02,05] [28] -3.58 f6e6 c5c6 e6d6 c6b7 d6c7 b5a6 g6g5
f2e2 f7f5 e2e3 h6h5 e3e2 f5f4 e2f3 h5h4 a4a5
c7b8 f3f2 d5d4 f2e1 b8c7 e1e2 c7b8 e2e1 b8c7
72 yes 14 [00:00:05,29] [21] +0.92 c1h6 d7b5 h5g7 e8c8 h4h5 g6h8 d1c2
c5d4 f3d4 b5d7 f2f3 e7c5 e1d1 c5d4 d1d4
73 yes 13 [00:00:00,87] [25] +7.96 h7h6 g5g6 e7h7 g6h5 h7f7 f6f7 g8f7
h5h6 f7g8 h6g5 b7b5 g5f6 g8f8 h2h4 b5b4 h4h5
b4b3 h5h6 f8g8 f6e5 b3b2 e5d5 b2b1q f4f5 b1b3
74 yes 22 [00:00:22,65] [28] +6.68 b3c2 f2f1q f7f1 e2f1 c2d3 f1f2 a2a4
c6c5 a4a5 f2f3 d3c4 f3g4 a5a6 g4h4 a6a7 e3d4
a7a8q h4g3 c4d3
75 no [--:--:--,--] [32] +0.09 f6f1 h2e5 f1b5 e8e7 b5b7 e7e6 b7d5
e6e7 d5b7 e7e6 b7d5 e6e7 d5b7 e7e6 b7d5 e6e7
d5b7
76 no [--:--:--,--] [28] +0.04 g7h7 g3e5 h7g7 e5g3 g7h7 g3e5 h7g7
e5g3 g7h7 g3e5 h7g7 e5g3 g7h7
77 yes 16 [00:00:13,52] [21] +3.24 c1c6 d5c6 e4f6 g7f6 g5h7 f6e5 h7f6
e7f6 f4f6 d8d6 f6e5 f8e8 e5f5 d6g6 g2g3 g6e6
78 yes 10 [00:00:00,27] [21] +327.43 f4f6 e7f6 d4f5 g6f5 e3a7 g7g6 a7f7
g6g5 f7g7 g5h4 g7f6 h4g3 f6g6 g3h3 g6f5 h3g3
f5e5 g3h3 e5h2 h3g4 f1f4 g4g5 h2g3 g5h5 f4f5
79 yes 16 [00:00:01,10] [30] +5.82 f4g4 f5g4 f3f4 g5h5 e7f8 g6g5 c4f7
h6g6 f4f5 h5h6 f5g6 h7g6 f8g8 a3a2 f7a2 b4b3
a2b3 h6h5 g8f7 h5h6 b3e6 h6h7 f7f6 h7h6 e6g4
80 no [--:--:--,--] [24] +10.94 a3a2 d5a5 a2b3 a5a8 d7e7 f6f5 e7e5
a8f8 d6d7 b6b5 e5f5 f2e1 f5e5 e1f1 e5e8 f8f7
d7d8q
81 no [--:--:--,--] [19] +0.36 a5a6 e3d4 a8b7 h1h3 f7f6 c3b3 b7b3
h3b3 f6g5 b3b7 e7f6 g2f1 a6a8 h4g5 f6g5 a3c4
e5f3 d4c3
82 no [--:--:--,--] [21] -3.64 f5g3 h4g3 e5f3 h5g4 d5e4 h6h5 f3e5
g4h3 e5f3 h5h4 e4f5 g2g1q f3g1 h3g2 g1e2 g2f1
e2f4 g3g2 f4h3 f1e1 f5g5 e1d2
83 no [--:--:--,--] [19] -0.60 g4e3 d5e3 g3e3 b4d5 e3e2 e8c6 d1d2
a8e8 f2f3 a6a5 b2d4 d5b4 e4c3 d6d5 e2e6 e8e6
84 yes 17 [00:01:23,24] [18] -0.26 h6f5 c3b2 d1g4 e8d7 g4h5 h8g8 f5h6
e6h6 h5h6 a8e8 h6d2 d7a4 d2b2 a4c6 b2d4
85 no [--:--:--,--] [23] -3.34 e6d5 c8b7 d5b7 f6f7 b7f3 e8h8 g3g5
f7f6 g5h5 h8h5 f3h5 a4a3 h5f3 f5g6 b2a3 a7a3
86 no [--:--:--,--] [20] -3.34 f7h6 f5f6 h6g4 f6e6 g3h3 e8f8 c1d2
a4a3 b2b3 a7c7 f2f3 d7d6 h3h6 e6d7 g4e3 d7c6
h6h5 c8e6 h5h6 f8f6
87 yes 5 [00:00:00,02] [22] +0.08 a1c1 b4a2 c1a1 a2b4 a1a7 e8g8 d1b3
c8a8 a7a8 b4c2 b3c2 f5c2 a8a7 d7c6 c4c5 c2b3
f1d3 e7e5 g3e5 g7e5
88 no [--:--:--,--] [20] +1.36 e6d5 c3d5 c7b7 e4e5 c5e6 d5e7 c6e7
e5d6 e7c6 f2f4 b5b4 e2g2 e6d8 e3d4 c8f5 g4f5
89 no [--:--:--,--] [18] +0.84 a7b5 c7c8 g2e3 h7h5 b5c3 d7d8 g1f2
b4c3 b2c3 d8f8 f2e2 c8c6 f4f1 h5h4 f1f4 h4g3
90 yes 19 [00:00:22,89] [24] +1.14 d7g4 f3g4 f4f3 e2c2 c8g4 g1h1 e7h4
b2b3 g4h3 c1h6 h5f4 h6f4 f8f4 f1e3 h4f2 c2f2
a8f8 f2g3 h3h6 -
Dann Corbit
- Posts: 12538
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: 83 nice Testpositions (Long and big post).
Code: Select all
Analysis from c:\epd\tough.epd
Analyzing engine: Fruit-2-3-1
8/10/2007 3:42:38 AM Level: 180 Seconds
1) Bf1-g2 a6-a7
2) Ng1-f3 Ng1-f3 * 8 Seconds
3) .. f5-f4 f5-f4 * 0 Seconds
4) Rd7-d2 Rd7-e7
5) .. f6-f5 Rd5-a5
6) Qf3-f6 Qf3-f4
7) Bd6xe5(?) Bd6-c5 * 6 Seconds
8) Rb8-b1 Rb8-h8
9) Ng5xf7 Bf5-c2
10) g7-g8N Ke5-f6
11) Ra4xa8 Ra4xe4
12) .. Qa2-a3 Qa2-a3 * 1 Second
13) Ng3-f5 Qf3-d3
14) .. Bc8-f5, Qb8-c7 0-0
15) Kg4xh4(?) Kg4xh4
16) Bd2xh6 Ra1-g1
17) Rg2xg7 Rg2-d2
18) Nb3-d4 Ka2-b1
19) Ng5xf7 Ng5xf7 * 172 Seconds
20) .. Ra8-f8 Ra8-f8 * 2 Seconds
21) .. Rd2xb2 Bb6-d8
22) Ng5-e6 Ng5-f3
23) Bd3xh7, Rf1-f6 b2-b3
24) Kh2-g3 Kh2-g3 * 99 Seconds
25) Qd3xg6 h4-h5
26) f5-f6 c6-c7
27) c6-c7 Rd1-h1
28) Kc7-d7 Kc7xb7
29) .. Nf6-g4 Qh3-h5
30) .. f7-f5 f7-f5 * 141 Seconds
31) .. Rb5xc5 Rb5xc5 * 0 Seconds
32) Kh2-h1 Kh2-h3
33) Re8-e3 h3-h4
34) Bd2xh6 0-0
35) .. e6-e5 Nb6-d5
36) Bh3-f1 Bh3-f1 * 30 Seconds
37) .. Bf2-c5 Bf2-c5 * 20 Seconds
38) .. Bc5xd6 Bc5xd6 * 1 Second
39) .. Ke8-e7 Ke8-d7
40) Qh8-f6 Qh8xc8
41) b3-b4 b3-b4 * 107 Seconds
42) .. Kb5-a4 Kb5-a4 * 91 Seconds
43) Bd6-c7 Bd6-c5
44) .. Bb7-d5 Qc7-a5
45) Rh1xh5 Rb1-a1
46) Nf3xg5 Kd3-c2
47) Rd1-e1 Qa7-d7
48) Ne5xf7 Ne5-c6
49) Rc1xc5 Qb3-c2
50) .. Rd8-d4 Rd8-d4 * 4 Seconds
51) c4-c5 c4-c5 * 32 Seconds
52) Ng3-f5, Ng3xh5 Bg5-h6
53) f2-f3 f2-f3 * 93 Seconds
54) .. h7-h5 h7-h5 * 32 Seconds
55) f5-f6 f5-f6 * 14 Seconds
56) d4-d5 Ra1-e1
57) Bb4-d2 Bb4-d2 * 20 Seconds
58) Bg5-f6 Qh5-h4
59) Qh5-h6 Nf5-h6
60) Qh5-h6 Qh5-h6 * 7 Seconds
61) Rc1xc6 Qd1-d2
62) Nd2-c4 Qd1-a4
63) .. Rf8xf3 Rf8xf3 * 41 Seconds
64) Qa2-f7 Qa2-f7 * 24 Seconds
65) .. d5xc4 d5xc4 * 6 Seconds
66) Re1-e6 Qf4xb4
67) Na3xb5 Na3xb5 * 114 Seconds
68) Rd5-h5 Qe2-e4
69) .. Ra8-a6 Qd5-d6
70) g3-g4 g3-g4 * 32 Seconds
71) .. Kf6-e6, Kf6-e7 Kf6-e6 * 1 Second
72) Bc1-h6 Bc1-h6 * 59 Seconds
73) .. h7-h6 h7-h6 * 1 Second
74) Kb3-c2 Kb3-c4
75) Kh7-h6 Qf6-f1
76) c3-c4 Kg7-h6
77) Rc1xc6 Ng5xh7
78) Rf4xf6 Rf4xf6 * 3 Seconds
79) Rf4-g4 Bc4-d5
80) Ka3-b2 Ka3xa2
81) .. Ne8-c7 Ra5-a4
82) Kd5-c6 Nf5-g7
83) Ng4xh6 Ng4xh6 * 7 Seconds
84) Nh6-f5 Bb2-a1
85) Be6xf5 Be6xd5
86) Nf7-d6 Nf7-h6
87) Ra1-c1 Ke1-d2
88) .. Bc8-b7 e6xd5
89) h2-h4 Na7-b5
90) .. Bd7xg4 Nh5-f6
31 of 90 matching moves
8/10/2007 8:13:52 AM, Total time: 4:31:14 AM Rated time: 3:16:28 = 11788 Seconds
-
George Tsavdaris
- Posts: 1627
- Joined: Thu Mar 09, 2006 12:35 pm
Re: 83 nice Testpositions (Long and big post).
Note that i did a mistake at number 31 of the EPD.Marc MP wrote:On my Athlon 1.4 with 96M hash and 5min per move, Chess Tiger 2007 solved 39 out of 90.
It is not only Rxc5 that wins but also Nxc5 that leads to a transposition.
So the number 31 should be:
8/3bkp2/n7/1rN1P3/2R3P1/2R4K/2p5/8 b - - am Nb4; bm Nxc5 Rxc5;
And since Chess Tiger gives:
31 no [--:--:--,--] [22] -2.16 a6c5 c4c5 b5c5 c3c5 d7a4 h3g3 f7f6
g3f4 f6e5 f4e5 e7f7 e5e4 f7e6 e4d3 e6d6 c5c3
a4d7 c3c2 d7g4 c2c1 g4f5 d3c3
It actually solves number 31.
So it actually solved 40 out of 90.
Impressive results for Chess Tiger 2007 indeed!
After his son's birth they've asked him:
"Is it a boy or girl?"
YES! He replied.....
"Is it a boy or girl?"
YES! He replied.....
-
Uri Blass
- Posts: 10280
- Joined: Thu Mar 09, 2006 12:37 am
- Location: Tel-Aviv Israel
Re: 83 nice Testpositions (Long and big post).
Thanks for this position
It seems that this position expose a bug in movei
Movei does not detect castling rights here and it seems that the rook g8 simply confuse movei because it believes that it can castle with that rook
Movei does not know that the position is not FRC game position.
Edit:
I wonder if other FRC engines have the same bug.
The problem is that after movei see that it can castle short based on the fen it looks for a rook and the first rook that it can find in the left side of the king is rook g8 so it assume that it can castle with rook g8(I should start from the corner and not from the king)
Uri
It seems that this position expose a bug in movei
Movei does not detect castling rights here and it seems that the rook g8 simply confuse movei because it believes that it can castle with that rook
Movei does not know that the position is not FRC game position.
Edit:
I wonder if other FRC engines have the same bug.
The problem is that after movei see that it can castle short based on the fen it looks for a rook and the first rook that it can find in the left side of the king is rook g8 so it assume that it can castle with rook g8(I should start from the corner and not from the king)
Uri
-
Uri Blass
- Posts: 10280
- Joined: Thu Mar 09, 2006 12:37 am
- Location: Tel-Aviv Israel
Re: 83 nice Testpositions (Long and big post).
Note that the tests of all positions that were done were only for 3 minutesGeorge Tsavdaris wrote:Note that i don't claim engines have problems solving some of these.Uri Blass wrote:I tested one engine that is not a top engine(private movei that is uisng hash for pruning) and it solved the first position in less than 10 minutes.
I claim that the results of top engines in solving ALL of these, are bad results and are below 40% for a reasonable time of 10-20 minutes per position, something not good if we want to support that engines play near perfectly today.
So we can't support it, since computer Chess is not only engine-engine or human-engine games but only analysis of positions and there computer Chess engines have a long way to travel before they can be characterized perfect.....
per position.
I doubt if you will see results below 40% for a reasonable time of 10-20 minutes per position espacially when I find that there are problems that programs need time to solve them(and there are more than one problem when movei needs more than 3 minutes but less than 10 minutes)
I believe that many amateurs can achieve 40% or better at reasonable time of 10-20 minutes per position.
Based on my memory
latest movei can do it for problems 1-3,5,7,10,12 so you already have 7/12 so I guess it is going to get more than 40% at 10 minutes per move(for comparison chess tiger that solved 40 positions got 6/12 in the first 6 positions and did it with slower hardware and less time and movei could not solve problems 1,5,12 in tiger condition).
Note that latest version seems to be better in games then the version that I used that solved problem number 5(the relative advantage of latest version is that it can see a draw score after solving the problem)
Latest version played also a match of 100 games 1+1 against fruit2.0 and fruit2.0 lost 55-45(new record for movei against fruit when previous record was 50.5-49.5)
Uri
-
Uri Blass
- Posts: 10280
- Joined: Thu Mar 09, 2006 12:37 am
- Location: Tel-Aviv Israel
Re: 83 nice Testpositions (Long and big post).
<snipped>
New game
4R3/3p4/KB1P3p/7P/8/p5pP/Pp3npb/1R3nkq w - - 0 1
Analysis by Movei00_8_438:
1.h3-h4
= (0.00) Depth: 6 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 5kN
1.h3-h4
= (0.00) Depth: 8 00:00:00 5kN
1.h3-h4
= (0.00) Depth: 8 00:00:00 13kN
1.h3-h4
= (0.00) Depth: 9 00:00:00 13kN
1.h3-h4
= (0.00) Depth: 9 00:00:00 31kN
1.h3-h4
= (0.00) Depth: 10 00:00:00 31kN
1.h3-h4
= (0.00) Depth: 10 00:00:00 86kN
1.h3-h4
= (0.00) Depth: 11 00:00:00 86kN
1.h3-h4
= (0.00) Depth: 11 00:00:01 726kN
1.h3-h4
= (0.00) Depth: 12 00:00:02 726kN
1.h3-h4
= (0.00) Depth: 12 00:00:03 1729kN
1.h3-h4
= (0.00) Depth: 13 00:00:03 1729kN
1.Re8-e6
= (0.01) Depth: 13 00:00:05 3336kN
1.Re8-e6
² (0.30) Depth: 13 00:00:05 3337kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2
+- (2.73) Depth: 13 00:00:06 3941kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2
+- (2.73) Depth: 13 00:00:07 4117kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2
+- (2.73) Depth: 14 00:00:07 4942kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2
+- (2.73) Depth: 14 00:00:12 7272kN
1.Re8-e6
+- (3.03) Depth: 15 00:00:12 7275kN
1.Re8-e6
+- (3.73) Depth: 15 00:00:12 7276kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2 Kg1-f1 11.Rd2xf2+ g3xf2 12.Qa3-d3+ Kf1-e1 13.Bb6-a5#
+- (#13) Depth: 15 00:00:14 9849kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2 Kg1-f1 11.Rd2xf2+ g3xf2 12.Qa3-d3+ Kf1-e1 13.Bb6-a5#
+- (#13) Depth: 15 00:00:17 12660kN
(, 12.08.2007)
This is wrong because movei finds Re6 with forced mate scoreGeorge Tsavdaris wrote:
4R3/3p4/KB1P3p/7P/8/p5pP/Pp3npb/1R3nkq w - - 0 1 bm Re3
New game
4R3/3p4/KB1P3p/7P/8/p5pP/Pp3npb/1R3nkq w - - 0 1
Analysis by Movei00_8_438:
1.h3-h4
= (0.00) Depth: 6 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 2kN
1.h3-h4
= (0.00) Depth: 7 00:00:00 5kN
1.h3-h4
= (0.00) Depth: 8 00:00:00 5kN
1.h3-h4
= (0.00) Depth: 8 00:00:00 13kN
1.h3-h4
= (0.00) Depth: 9 00:00:00 13kN
1.h3-h4
= (0.00) Depth: 9 00:00:00 31kN
1.h3-h4
= (0.00) Depth: 10 00:00:00 31kN
1.h3-h4
= (0.00) Depth: 10 00:00:00 86kN
1.h3-h4
= (0.00) Depth: 11 00:00:00 86kN
1.h3-h4
= (0.00) Depth: 11 00:00:01 726kN
1.h3-h4
= (0.00) Depth: 12 00:00:02 726kN
1.h3-h4
= (0.00) Depth: 12 00:00:03 1729kN
1.h3-h4
= (0.00) Depth: 13 00:00:03 1729kN
1.Re8-e6
= (0.01) Depth: 13 00:00:05 3336kN
1.Re8-e6
² (0.30) Depth: 13 00:00:05 3337kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2
+- (2.73) Depth: 13 00:00:06 3941kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2
+- (2.73) Depth: 13 00:00:07 4117kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2
+- (2.73) Depth: 14 00:00:07 4942kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2
+- (2.73) Depth: 14 00:00:12 7272kN
1.Re8-e6
+- (3.03) Depth: 15 00:00:12 7275kN
1.Re8-e6
+- (3.73) Depth: 15 00:00:12 7276kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2 Kg1-f1 11.Rd2xf2+ g3xf2 12.Qa3-d3+ Kf1-e1 13.Bb6-a5#
+- (#13) Depth: 15 00:00:14 9849kN
1.Re8-e6 d7xe6 2.d6-d7 e6-e5 3.d7-d8Q e5-e4 4.Qd8-e8 e4-e3 5.Bb6-a5 Nf2xh3 6.Qe8xe3+ Nh3-f2 7.Qe3xa3 Nf2-h3 8.Ba5-b6+ Nh3-f2 9.Rb1xb2 Nf1-d2 10.Rb2xd2 Kg1-f1 11.Rd2xf2+ g3xf2 12.Qa3-d3+ Kf1-e1 13.Bb6-a5#
+- (#13) Depth: 15 00:00:17 12660kN
(, 12.08.2007)
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Uri Blass
- Posts: 10280
- Joined: Thu Mar 09, 2006 12:37 am
- Location: Tel-Aviv Israel
Re: 83 nice Testpositions (Long and big post).
I suspect also that the following is wrong and it needs to be am Bxh6 bm 0-0
[D]2kr1nr1/pbp1qp2/1p2pn1p/8/3Pp2Q/P1P3N1/2PBBPPP/R3K2R w KQ - 0 1 am O-O; bm Bxh6;
[D]2kr1nr1/pbp1qp2/1p2pn1p/8/3Pp2Q/P1P3N1/2PBBPPP/R3K2R w KQ - 0 1 am O-O; bm Bxh6;
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Uri Blass
- Posts: 10280
- Joined: Thu Mar 09, 2006 12:37 am
- Location: Tel-Aviv Israel
Re: A small correction.....
George Tsavdaris wrote:In the following position for the:
Avoid Kd7? that loses and play Ke7 that draws.
[D]rnb1k2r/1p5p/p6Q/4p3/3qN3/8/PPP2R1P/2K5 w - - 0 1
The position is wrong and the correct position is:
Avoid Kd7? that loses and play Ke7 that draws.
[D]rnb1k2Q/1p5p/p7/4p3/4q3/8/PPP2R1P/2K5 b - - 0 1
I do not see how Ke7 draws.
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rnb1k2Q/1p5p/p7/4p3/4q3/8/PPP2R1P/2K5 b - - 0 1"]
[PlyCount "12"]
1... Ke7 2. Qf8+ Kd7 3. Rf7+ Kc6 4. Qxc8+ Kb6 (4... Kd5 5. Rf1 Qe3+ 6. Kb1 Qe2
7. Rc1) 5. Qc7+ Kb5 6. a4+ Kxa4 7. b3+ *