Barfoed-Edwards, corr. W-22ch sf01 1997

[jdart]

[D] R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - -

bm Ng5 (this is superior to Ne5). This one is pretty hard.

--Jon

[PauloSoare]

[D] R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - -

bm Ng5 (this is superior to Ne5). This one is pretty hard.

--Jon

Hiarcs 11.1 mp Athlon 2 cores 3800+ HT=1Gb

Hiarcs find Ng5 fast, but the evaluation drop on depth 16.

New game
R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - - 0 1

Analysis by HIARCS 11.1 MP UCI:

1.Ne5 Rb5 2.R2a5 Rdb3 3.R8a7 Rxa5 4.Rxa5 Bd6 5.f3 Rb2+
² (0.35) Depth: 9/25 00:00:00 320kN
1.Ne5 Rb5 2.R2a5 Rdb3 3.R8a7 Rxa5 4.Rxa5 Bd6 5.f3 Rb2+ 6.Kh3
² (0.35) Depth: 9/25 00:00:00 346kN
1.Ne5 Rb5 2.R2a5 Rdb3 3.R8a7 Rxa5 4.Rxa5 Bd6 5.Rd5 f3+ 6.Kg3 Qf6
² (0.34) Depth: 10/26 00:00:01 786kN
1.Ne5 Rb5 2.R2a5 Rdb3 3.R8a7 Rxa5 4.Rxa5 Bd6 5.Rd5 Be7 6.Qh2 Bg5
² (0.29) Depth: 11/30 00:00:03 1924kN
1.Ne5 Rb5 2.R2a5 Rdb3 3.R8a7 Rxa5 4.Rxa5 Bd6 5.Rd5 Be7 6.Kh2 Kg7 7.Rd7
² (0.34) Depth: 12/32 00:00:07 4897kN
1.Ne5 Rb5 2.R2a5 Rdb3 3.Qf5 Qxf5 4.exf5 Rxa5 5.Rxa5 f6
² (0.34) Depth: 13/36 00:00:15 10298kN
1.Ng5
² (0.35) Depth: 13/37 00:00:23 15418kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 Kxe6 8.Qf5+ Ke7 9.e5 Ke8 10.g5
² (0.53) Depth: 13/39 00:00:28 18924kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 Kxe6 8.Qf5+ Ke7 9.e5 Rdc3 10.Qf6+ Ke8 11.e6 fxe6 12.Qxe6+ Kf8
± (0.71) Depth: 14/42 00:00:45 31696kN
1.Ng5
± (0.96) Depth: 15/42 00:01:16 53548kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 Kxe6 8.e5 Kd7 9.Qf6 Ke8 10.g5 Rdc3 11.g6 fxg6
± (0.96) Depth: 15/44 00:01:30 65148kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 Kxe6 8.e5 Kd7 9.Qf6 Ke8 10.g5 Rdc3 11.e6 fxe6
± (0.82) Depth: 16/48 00:03:10 140mN

(Soares, Residencia 17.05.2007)

[Chris Taylor]

[quote="jdart"][D] R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - -

bm Ng5 (this is superior to Ne5). This one is pretty hard.

--Jon[/quote]

Hi

New game
R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - - 0 1

Analysis by Pro Deo 1.2:

1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
= (-0.05) Depth: 9 00:00:03 5217kN
² (0.70) Depth: 14 00:04:35 457mN

(Taylor, Notts 17.05.2007)

Looks good...

Chris

[JVMerlino]

Three seconds for CM9_R1 on a P4-3.0:

Code: Select all

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.91	3087		1.Ne5 Rb5 2.Rxf8+ Kxf8 3.Ra8+ Kg7
0:00	1/3	-0.26	3936		1.Nd2 Rxd2 2.Rxf8+ Kxf8 3.Rxd2
					Qxe4+ 4.Kh2
0:00	1/4	-0.26	9477		1.Nd2 Rxd2 2.Rxf8+ Kxf8 3.Rxd2
					Qxe4+ 4.Kh2
0:00	1/4	0.38	12586		1.Ne5 Rb5 2.R2a5 Rxa5 3.Rxa5
0:00	1/5	0.17	32423		1.Ne5 Rb5 2.R2a5 Rxa5 3.Rxa5 f3+
					4.Kg3 Rd1
0:00	1/6	0.19	139489		1.Ne5 Rb5 2.R2a5 Rxa5 3.Rxa5 Rd2
					4.Ra7 Bc5
0:02	1/7	0.08	305049		1.Ne5 Rb5 2.R2a5 Rxa5 3.Rxa5 Rd2
					4.Ra8 f3+ 5.Kg3
0:03	1/7	0.50	505828		1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
					Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+
					Ke5 7.Rxe6+ Kxe6
0:05	1/8	0.84	790223		1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
					Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+
					Ke5 7.Rxe6+ Kxe6 8.Qc7
0:10	1/9	0.83	1618369		1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
					Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+
					Ke5 7.Rxe6+ Kxe6 8.Qc7 Rd6
0:25	1/10	0.92	3867098		1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
					Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+
					Ke5 7.Rxe6+ Kxe6 8.Qc7 f3+ 9.Kg3
					Rd2
0:57	1/11	0.89	9124100		1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+
					Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+
					Ke5 7.Rxe6+ Kxe6 8.Qc7 Rbc3 9.Qxf4
					Rc2

jm

[Jouni]

Hard?? Almost all engines solve instantly in my old PC. E.g. Strelka:

Code: Select all

New game, 5'/60
R4bk1/5p2/4q2p/7Q/4PpP1/1r1r1N2/R4PK1/8 w - - 0 1

Analysis by Strelka 1.0:

1.Rxf8+ Kxf8 2.Ra8+ Kg7 
  -+  (-2.07)   Depth: 1   00:00:00
1.R8a6 Qxe4 
  -+  (-1.43)   Depth: 1   00:00:00
1.Qc5 Qxg4+ 2.Kf1 
  ³  (-0.47)   Depth: 1   00:00:00
1.Ne5 f3+ 2.Kg1 
  ±  (1.16)   Depth: 1   00:00:00
1.Ne5 Rd1 
  ±  (0.76)   Depth: 2   00:00:00
1.Ne5 Rb5 2.R2a5 Rxa5 3.Rxa5 
  ²  (0.67)   Depth: 3   00:00:00
1.Ne5 Rb5 2.R2a5 f3+ 3.Kh2 Rxa5 4.Rxa5 
  ²  (0.32)   Depth: 4   00:00:00
1.Ne5 Rb5 2.R2a5 f3+ 3.Kh2 Rxa5 4.Rxa5 
  ²  (0.32)   Depth: 5   00:00:00
1.Ne5 Rb5 2.R2a5 f3+ 3.Kh2 Rxa5 4.Rxa5 Rd1 
  =  (0.13)   Depth: 6   00:00:00  21kN
1.Ne5 Rb5 2.R2a5 f3+ 3.Kh2 Rxa5 4.Rxa5 Rd2 5.Kg1 
  =  (0.07)   Depth: 7   00:00:00  53kN
1.Ne5 Rb5 2.R2a5 f3+ 3.Kh3 Rxa5 4.Rxa5 Rd8 5.Qf5 Bb4 6.Qxe6 fxe6 
  ²  (0.27)   Depth: 8   00:00:00  177kN
1.Ng5 f3+ 2.Kh3 hxg5 3.Rxf8+ Kxf8 4.Ra8+ Ke7 5.Qxg5+ Kd7 6.Qd8+ Kc6 7.Ra6+ Kb5 8.Qa5+ Kc4 9.Qc7+ Kb4 10.Rxe6 fxe6 
  ±  (0.79)   Depth: 8   00:00:00  382kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+ Ke5 7.Rxe6+ Kxe6 8.Qc7 f3+ 9.Kg3 Rb4 
  ±  (1.02)   Depth: 9   00:00:01  679kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+ Ke5 7.Rxe6+ Kxe6 8.Qc7 f3+ 9.Kg3 Rd4 10.Kf4 
  ±  (1.02)   Depth: 10   00:00:01  1166kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 fxe6 8.Qc5 Rb2 9.g5 
  ±  (1.15)   Depth: 11   00:00:03  2728kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+ Ke5 7.Rxe6+ Kxe6 8.Qg8+ Ke5 9.Qe8+ Kd6 10.Qf8+ Ke6 11.Qc5 f3+ 12.Kg3 Ra3 
  ±  (1.26)   Depth: 12   00:00:07  6263kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ f6 5.Qg7+ Kd6 6.Ra6+ Ke5 7.Rxe6+ Kxe6 8.Qg8+ Ke7 9.Qh7+ Ke8 10.Qc7 f3+ 11.Kg3 Rbc3 12.Qg7 Rd6 
  +-  (1.55)   Depth: 13   00:00:18  14999kN
1.Ng5 hxg5 2.Rxf8+ Kxf8 3.Ra8+ Ke7 4.Qxg5+ Kd6 5.Ra6+ Kd7 6.Rxe6 f3+ 7.Kg3 Kxe6 8.Qf5+ Ke7 9.e5 Rbc3 10.Qe4 Ke6 11.g5 
  +-  (1.61)   Depth: 14   00:00:38  34380kN

Jouni

[PauloSoare]

Hard?? Almost all engines solve instantly in my old PC. E.g. Strelka:

Jouni

I think "hard" it´s the endgame that can happen. I found that
whites can win, but it´s deeply for engines.

Paulo Soares