Good Engine Test.....RXN

[rightrook]

[d]r1b1kb1r/1p4pp/p2ppn2/8/2qNP3/2N1B3/PPP3PP/R2Q1RK1 w kq - 0 1


SOS 5.......11 seconds...!

Ruffian 1.0.5..........33 sec.

Diagram from the book

Winning Chess Traps....by CHERNEV......1946

[Eelco de Groot]

[d]r1b1kb1r/1p4pp/p2ppn2/8/2qNP3/2N1B3/PPP3PP/R2Q1RK1 w kq - 0 1


SOS 5.......11 seconds...!

Ruffian 1.0.5..........33 sec.

Diagram from the book

Winning Chess Traps....by CHERNEV......1946

I think the position is in many computeropeningbooks also, in shredder11.bkt it says Rf6 is from a 1935 game but no information about the players.

Ancalagon plays it a tempo, that does not mean very much I suppose and the evals are very high again in this Build, also for King Safety I have not checked in other positions yet but the values for King Safety could be very high, but nice to see he only needs 557 nodes to play it

[d]r1b1kb1r/1p4pp/p2ppn2/8/2qNP3/2N1B3/PPP3PP/R2Q1RK1 w kq -

Engine: Ancalagon 1.08 Beta Build 4 (Athlon 2009 MHz, 256 MB)
by Tord Romstad, Eelco de Groot

2.00 0:00 +0.17 1.a3 e5 (201) 0

2.00 0:00 +1.86 1.Qd3 Qxd3 2.cxd3 (339) 1

2.00 0:00 +6.50 1.Rxf6 Kd8 (557) 1

3.00 0:00 +11.03 1.Rxf6 gxf6 2.Qh5+ Ke7 (939) 3

4.00 0:00 +14.84 1.Rxf6 gxf6 2.Qh5+ Ke7 3.Rf1 (2.379) 7

5.00 0:00 +9.27 1.Rxf6 gxf6 2.Qh5+ Ke7 3.Nf5+ exf5
4.Nd5+ Kd8 5.Bb6+ Kd7 6.Qxf5+ Kc6 (7.500) 22

6.00 0:00 +9.27 1.Rxf6 gxf6 2.Qh5+ Ke7 3.Nf5+ exf5
4.Nd5+ Kd8 5.Bb6+ Kd7 6.Qxf5+ Kc6 (15.259) 44

7.00 0:00 +13.15 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Be7
4.Rf1 Bd7 (40.745) 96

8.00 0:00 +11.39 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Be7
4.Rf1 Rf8 5.Qxh7 (60.748) 121

9.00 0:00 +13.00 1.Rxf6 gxf6 2.Qh5+ Kd7 3.Qf7+ Be7
4.Nf5 Re8 5.Kh1 d5 6.Nxe7 Rxe7
7.Qxf6 (140.669) 176

10.00 0:01 +11.96 1.Rxf6 gxf6 2.Qh5+ Kd7 3.Qf7+ Be7
4.Nf5 Re8 5.Kh1 h5 6.Ng7 Rf8 (247.610) 217

11.01 0:01 +6.52 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Qxf6+ Qe7 5.Qxh8 Qg7 6.Bg5+ Kc7
7.Qxg7+ Bxg7 8.e5 Kb8 (420.579) 253

12.01 0:02 +6.68 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Qxf6+ Qe7 5.Qxh8 Qg7 6.Bg5+ Kc7
7.Bf6 Qxh8 8.Bxh8 Kb8 9.Bf6 (777.273) 290

13.01 0:05 +5.62 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Qxf6+ Ke8 5.Qxh8 Qg7 6.Qxg7 Bxg7
7.Rf1 Bxd4 8.Bxd4 Bd7 9.e5 d5 (1.636.719) 311

14.01 0:11 +5.64 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Qxf6+ Ke8 5.Qxh8 Qg7 6.Qxg7 Bxg7
7.Rf1 Bd7 8.Nce2 Bxd4 9.Nxd4 e5
10.Nf5 (3.632.296) 324

15.01 0:35 +5.94 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Qxf6+ Ke8 5.Qxh8 Qg7 6.Qxg7 Bxg7
7.Rd1 Bd7 8.Nde2 Be5 9.Bg5 Bxc3
10.Nxc3 h6 11.Bxh6 (11.591.626) 330

16.01 1:36 +6.41 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Nxe6+ Bxe6 5.Qxe6 Qe7 6.Qd5 Ke8
7.Qc4 f5 8.Bd4 Qf7 9.Qa4+ Qd7 10.Qb3 Qf7
11.Qxf7+ Kxf7 12.Bxh8 (32.067.558) 330

17.01 3:29 +7.84 1.Rxf6 gxf6 2.Qh5+ Kd8 3.Qf7 Qc7
4.Nxe6+ Bxe6 5.Qxe6 Qd7 6.Qxf6+ Ke8
7.Qxh8 Qg7 8.Qxg7 Bxg7 9.Nd5 Rc8
10.c3 Rc4 11.Bg5 Rxe4 12.Rf1 (69.725.747) 332

best move: Rf1xf6 time: 3:35.469 min n/s: 332.369 nodes: 71.610.000

[rightrook]

Thanks Brian...

I also notice that some of the personalities in CM-9000 play it right away and keep it....

regards

Robert

[jdart]

This position is from Lasker-Pirc, Moscow 1935. It is in my "arasan9" test suite (position 289).

--Jon