couple of nice sacs from WCRCC

[jdart]

NightmareX-thebaron:

[D] r4rk1/pbq2ppp/1pnn4/3p4/2pP1PN1/P1P1P3/1BB3PP/R2Q1RK1 w - - 0 16

Nf6+!. TheBaron played .. Kh8 and after Nxh7! NightmareX was winning. (.. gxf6 is no better due to Bxh7).

Not sure if thebaron saw this coming or not.

Sjeng-Deuterium2009:

[D] r3rb1k/1b1n2p1/pq1p3p/1ppn4/P3N1N1/6RP/1P3PP1/1BBQR1K1 w - -

Nxh6! This one is harder to find and ended the game practically right away.

[Ajedrecista]

Hello Jon:

The second position reminds me a lot the first position of Nolot test:

http://en.wikipedia.org/wiki/Nolot

They are not the same, but a lot of pieces are in same squares, and the star move is also the same: Nxh6!! Long time ago, first position of Nolot was very hard for engines, but now is almost easy: Houdini 1.5a starts to think that Nxh6 is good in more less eight seconds in my sistem (a slow Dual Core w32), around the same time as some IvanHoe compiles. I think new StockFish takes less than a minute in my computer, and I think the same story applies to Rybka, Critter and ever Komodo last versions (although I have not checked it).

Regards from Spain.

Ajedrecista.

[zullil]

NightmareX-thebaron:

[D] r4rk1/pbq2ppp/1pnn4/3p4/2pP1PN1/P1P1P3/1BB3PP/R2Q1RK1 w - - 0 16

Nf6+!. TheBaron played .. Kh8 and after Nxh7! NightmareX was winning. (.. gxf6 is no better due to Bxh7).

Not sure if thebaron saw this coming or not.

Sjeng-Deuterium2009:

[D] r3rb1k/1b1n2p1/pq1p3p/1ppn4/P3N1N1/6RP/1P3PP1/1BBQR1K1 w - -

Nxh6! This one is harder to find and ended the game practically right away.

Critter handles these easily:

Code: Select all

Critter Chess v1.2.1 64-bit SSE4
By Richard Vida, Slovakia

GTB Init OK

Hash table:  67108864 entries of 16 bytes = 1024 MB total
Eval cache:     32768 entries of  8 bytes =  256 KB total
Pawn hash :     65536 entries of 32 bytes =    2 MB total

8 cpu(s) detected

Opening book: "book.cbk" - 53436 entries [native]

epdtest wcrcc_sacs.epd 10000
  1)
     FEN: r4rk1/pbq2ppp/1pnn4/3p4/2pP1PN1/P1P1P3/1BB3PP/R2Q1RK1 w - - bm Nf6+
     Searching for: Nf6+ 

   2/ 2  00:00       196  196000  +0.37 Qf3 Ne7 Ne5 Ne4 Bxe4 dxe4
   3/ 4  00:00       440  440000  +0.37 Qf3 Ne7 Ne5 Ne4 Bxe4 dxe4
   4/ 6  00:00       719  719000  +0.37 Qf3 Ne7 Ne5 Ne4 Bxe4 dxe4
   5/ 8  00:00      1172 1172000  +0.37 Qf3 Ne7 Ne5 Ne4 Bxe4 dxe4
   6/ 9  00:00      2913  971000  +0.31 Qf3 Na5 Ne5 Nb3 Rae1 g6
   7/12  00:00      5874 1174800  +0.33 Qf3 Na5 Ne5 Nb3 Rae1 g6 f5
   8/14- 00:00     10818 1352250  +0.25 Qf3 Na5 Ne5 Nb3 Rae1 g6 f5
   8/14  00:00     15784 1315333  +0.29 Qf3 f5 Ne5 Ne4 Bxe4 dxe4 Qh5 Nxe5 fxe5 Qd7
   9/16  00:00     21843 1365187  +0.29 Qf3 f5 Ne5 Ne4 Bxe4 dxe4 Qh5 Nxe5 fxe5 Qd7 a4
  10/24- 00:00    124907 1665426  +0.20 Qf3 f5 Ne5 Ne4 Bxe4 dxe4 Qh5 Nxe5 fxe5 Qd7 a4
  10/24  00:00    156210 1735666  +0.21 Qf3 Ne4 Qe2 Nd6 a4 Rfe8 Qf3 Ne4 Ne5 Nxe5 fxe5
  11/24  00:00    197332 1879352  +0.15 Qf3 Ne4 Qe2 Nd6 Qf2 f6 Qh4 h6 Qh5 Qf7 Bg6 Qe6
  12/29+ 00:00    481186 2259089  +0.24 Qf3 Ne4 Qe2 Nd6 Qf2 f6 Qh4 h6 Qh5 Qf7 Bg6 Qe6
  12/31  00:00    783062 2636572  +0.15 a4 f6 Qf3 Ne7 Ba3 Ne4 Bxe4 dxe4 Qe2 Bd5 Rab1 Be6 Nf2 f5
  13/31  00:00    984594 2845647  +0.15 a4 f6 Qf3 Ne7 Ba3 Ne4 Bxe4 dxe4 Qe2 Bd5 Rab1 Be6 Nf2 f5
  14/34  00:00   4410400 4804357  +0.15 a4 Bc8 Ba3 Ne7 Qf3 Bxg4 Qxg4 f5 Qg3 Rad8 Qg5 h6 Qh4 Qd7 Rab1 Ng6
  15/36+ 00:01   6890414 5271931  +0.24 a4 Bc8 Ba3 Ne7 Qf3 Bxg4 Qxg4 f5 Qg3 Rad8 a5 b5 Rfb1 Rb8 Bc5 Ne4 Bxe4 fxe4 Qg4
  15/36  00:02  13096712 6496384  +0.11 a4 f6 Qf3 Na5 Rad1 Rad8 Qg3 Bc8 Nf2 Nb3 e4 dxe4 Nxe4 Nf5 Qf3 Rfe8 d5
  16/38+ 00:02  19864659 6861712  +0.20 a4 f6 Qf3 Na5 Rad1 Rad8 Qg3 Bc8 Nf2 Nb3 e4 dxe4 Nxe4 Nf5 Qf3 Rfe8 Rde1
  16/38  00:03  24661331 7098828  +0.19 a4 Ne7 Ba3 Bc8 Qf3 Bxg4 Qxg4 f5 Qe2 Ne4 Bxe4 fxe4 Qg4 Rad8 f5 Qd7 Qg5 Rf6
  17/41+ 00:04  30316608 7141721  +0.28 a4 Ne7 Ba3 Bc8 Qf3 Bxg4 Qxg4 f5 Qe2 Rf6 Rfb1 a6 Ra2 Ne4 Bxe4 fxe4 Bxe7 Qxe7 Rab2 Rb8 Qh5
  17/41  00:04  32896784 7196846  +0.27 a4 Ne7 Ba3 Rad8 a5 bxa5 Qf3 f6 Qh3 h6 Qh5 Bc8 Rfb1 Bxg4 Qxg4 f5 Qh5 Rb8 Bxd6 Rxb1+ Bxb1 Qxd6 Rxa5
  17/48+ 00:05  44956479 7739108  +0.36 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48+ 00:05  45438622 7725029  +0.49 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48+ 00:05  46210888 7730158  +0.68 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48+ 00:06  47098403 7713462  +0.97 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48+ 00:06  48155109 7685143  +1.39 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48+ 00:06  50484311 7687575  +2.03 Nf6+ gxf6 Qg4+ Kh8 Qh4 f5 Qf6+ Kg8 Qg5+ Kh8
  17/48  00:08  65837750 7637790  +2.51 Nf6+ Kh8 Nxh7 f5 Nxf8 Rxf8 Qh5+ Kg8 a4 Rf6 Ba3 Qd7 Rf3 Rh6 Qg5 Ne7 Rg3 Rg6 Qh4 Re6 Rb1
bestmove Nf6+ ponder Kh8

time: 9991 nodes: 76839128 evals: 56454200 knps: 7690
phash: 91.70% evalcache: 9.91% lazy: 46.56% eg_recog: 35
splits: 13695

 Found in 00:05, Total time: 00:09, Rated time: 00:05, 1 of 1 matching

  2)
     FEN: r3rb1k/1b1n2p1/pq1p3p/1ppn4/P3N1N1/6RP/1P3PP1/1BBQR1K1 w - - bm Nxh6
     Searching for: Nxh6 

   2/ 2  00:00       499       0  -0.57 Rf3 c4 Ne3 N7f6 Nxf6 Nxf6
   3/ 3  00:00      1293 1293000  -0.46 Rf3 c4 Rf7 Be7 Ne3
   4/ 5  00:00      1966  983000  -0.46 Rf3 c4 Rf7 Be7 Ne3
   5/ 7  00:00      4378 1094500  -0.45 Rf3 c4 Rf7 Be7 Nc3
   6/ 8  00:00     10084 1260500  -0.54 Rf3 c4 Rf7 Re7 Rf5 Qa5 Ne3
   6/ 8  00:00     16746 1288153  -0.46 Bd2 Be7 Ne3 Nxe3 Bxe3 Ne5 Qb3
   7/ 9  00:00     24315 1279736  -0.48 Bd2 Be7 Ne3 Nxe3 Bxe3 Ne5 Nc3 Bh4
   8/12+ 00:00     38350 1278333  -0.39 Bd2 Be7 Ne3 Nxe3 Bxe3 Ne5 Nc3 Bh4 Qc2
   8/12+ 00:00     83030 1317936  -0.30 Bd2 Be7 Ne3 Nxe3 Bxe3 Ne5 Nc3 Bh4 Qc2
   8/12  00:00     95624 1328111  -0.38 Bd2 bxa4 Nc3 Rxe1+ Bxe1 Qb3 Qd3 N5f6 Nxf6 Nxf6
   9/14  00:00    181038 1351029  -0.40 Bd2 bxa4 Qxa4 Bc6 Qa3 Rab8 b3 h5 Ne3 Qxb3 Qxa6
   9/14+ 00:00    236779 1337734  -0.29 Qf3 c4 Nxh6 gxh6 Qf7 N7f6 Nxf6 Rxe1+ Kh2
   9/14  00:00    246677 1340635  -0.38 Qf3 Qc7 Qf5 Ne7 Qe6 Nc6 Qf7 Re7 Qg6 Nd4 Ne3
  10/21  00:00    320969 1389476  -0.38 Qf3 Qc7 Qf5 Ne7 Qe6 Nc6 Qf7 Re7 Qg6 Nd4 Ne3
  10/22+ 00:00    477473 1482835  -0.30 b3 bxa4 Nxh6 gxh6 Bb2+ Re5 Qg4 N5f6 Nxf6 Rxe1+ Kh2 Nxf6 Qg8#
  10/22+ 00:00    533397 1523991  -0.21 b3 bxa4 Nxh6 gxh6 Bb2+ Re5 Qg4 N5f6 Nxf6 Rxe1+ Kh2 Nxf6 Qg8#
  10/22+ 00:00    640505 1663649  -0.08 b3 bxa4 Nxh6 gxh6 Bb2+ Re5 Qg4 N5f6 Nxf6 Rxe1+ Kh2 Nxf6 Qg8#
  10/26  00:00    911071 1848014  -0.11 b3 Ne5 Nxe5 dxe5 Nd2 Nf6 Bb2 Rad8 axb5 axb5 Bxe5 Bd6
  11/26+ 00:00   1116793 1922191  -0.03 b3 Ne5 Nxe5 dxe5 Nd2 Nf6 Bb2 Rad8 Bg6 Re6 Rxe5 Rxe5 Bxe5 Bd6 Re3 Bxe5 Rxe5 c4
  11/31+ 00:00   1535946 2175560  +0.05 b3 Ne5 Nxe5 dxe5 Nd2 Nf6 Bb2 Rad8 Bg6 Re6 Rxe5 Rxe5 Bxe5 Bd6 Re3 Bxe5 Rxe5 c4
  11/31  00:00   1761371 2317593  +0.09 b3 Ne5 Bb2 Qc7 Nxe5 dxe5 Qg4 Qf7 Nd2 Nf6 Qf5 Rad8
  12/31  00:00   2581225 2805679  +0.06 b3 Ne5 Bb2 Nf7 Qf3 Ne5 Nxe5 dxe5 Nd2 Nf4 Be4 Bxe4 Qxe4 Qd6 Rd1
  12/31+ 00:01   3410838 3208690  +0.18 Nxh6 gxh6 Qg4 N7f6
  12/31+ 00:01   3643004 3302814  +0.26 Nxh6 gxh6 Qg4 N7f6
  12/31+ 00:01   3984873 3435235  +0.39 Nxh6 gxh6 Qg4 N7f6
  12/31+ 00:01   4337422 3543645  +0.58 Nxh6 gxh6 Qg4 N7f6
  12/31+ 00:01   4945423 3792502  +0.87 Nxh6 gxh6 Qg4 N7f6
  12/31+ 00:01   5705714 3970573  +1.30 Nxh6 gxh6 Qg4 N7f6
  12/36+ 00:01   7601465 4192755  +1.93 Nxh6 gxh6 Qg4 N7f6
  12/42+ 00:02  11382330 4703442  +2.89 Nxh6 gxh6 Qg4 N7f6
  12/42  00:04  21527384 5381846  +3.02 Nxh6 Re5 Nf7+ Kg8 Neg5 Be7 Nxe5 dxe5 Bh7+ Kf8 Bf5 Bxg5 Rxg5 Qc7 Qh5 N7f6 Qh8+ Ng8 Bd2 Ndf6
  13/42+ 00:04  23636561 5477766  +3.21 Nxh6 Re5 Nf7+ Kg8 Neg5 Be7 Nxe5 dxe5 Bh7+ Kf8 Bf5 Bxg5 Rxg5 N7f6 Rxe5 Ne7 Bd7 Rd8
  13/42  00:04  25302862 5389320  +3.24 Nxh6 Re5 Nf7+ Kg8 Neg5 Rxg5 Nxg5 N7f6 Ne6 Kh8 Qc2 Re8 Bd2 Bc8 Nxf8 Rxf8 Qg6 Qc7 Bh6 Rg8 Rd1 Be6
  14/42- 00:04  26129414 5408696  +3.04 Nxh6 Re5 Nf7+ Kg8 Neg5 Rxg5 Nxg5 N7f6 Ne6 Kh8 Qc2 Re8 Bd2 Bc8 Nxf8 Rxf8 Qg6 Qc7 Bh6 Rg8 Rd1 Be6
  14/42  00:05  30080588 5699239  +3.21 Nxh6 Re5 Nf7+ Kg8 Neg5 Rxg5 Nxg5 N7f6 Ne6 Bc8 Nxg7 Bxg7 Re8+ Nxe8 Qxd5+ Kf8 Qxa8 Bb7 Qb8 Qc7 Qxc7 Nxc7 Rg6 Be5 axb5 axb5 h4 Bd5 h5 Bf7 Rh6 Kg7 Rh7+ Kf6
  15/42  00:05  35273471 6061775  +3.21 Nxh6 Re5 Nf7+ Kg8 Neg5 Rxg5 Nxg5 N7f6 Ne6 Bc8 Nxg7 Bxg7 Re8+ Nxe8 Qxd5+ Kf8 Qxa8 Bb7 Qb8 Qc7 Qxc7 Nxc7 Rg6 Be5 axb5 axb5 h4 Bd5 h5 Bf7 Rh6 Kg7 Rh7+ Kf6
bestmove Nxh6 ponder Re5

time: 5819 nodes: 35274441 evals: 29782918 knps: 6061
phash: 95.73% evalcache: 7.59% lazy: 41.95% eg_recog: 289
splits: 1373

 Found in 00:01, Total time: 00:15, Rated time: 00:06, 2 of 2 matching

[jdart]

Correction: the 2nd position is from ChironX-Deuterium2009 (not Sjeng-Deuterium2009).

--Jon

[bhlangonijr]

another sac from the game Redqueenchess-ChironX:

[D] 5rk1/4qpp1/p3b2p/B1p1P3/4Pn2/2P1RN1P/1r3PP1/R2Q2K1 b - - 0 22

ChironX played Bxh3 and after that the score went down the hill for Redqueen.

[michiguel]

NightmareX-thebaron:

[D] r4rk1/pbq2ppp/1pnn4/3p4/2pP1PN1/P1P1P3/1BB3PP/R2Q1RK1 w - - 0 16

Nf6+!. TheBaron played .. Kh8 and after Nxh7! NightmareX was winning. (.. gxf6 is no better due to Bxh7).

Not sure if thebaron saw this coming or not.

Sjeng-Deuterium2009:

[D] r3rb1k/1b1n2p1/pq1p3p/1ppn4/P3N1N1/6RP/1P3PP1/1BBQR1K1 w - -

Nxh6! This one is harder to find and ended the game practically right away.

That was a ChironX game, I was observing it, IIRC. BTW, black blundered with the previous Qb6.

Miguel