Why is this Rook Sacrifice is SO GREAT ? ? ?

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Chessqueen
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Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by Chessqueen » Fri Jun 26, 2020 4:47 am

I believe that most engines rated above 3300 will also sacrifice the Rook with the same position. Correct me if I am wrong and let me know which engine rated above 3300 does NOT Sacrifice the Rook?
https://www.youtube.com/watch?v=UexQmPtUZaM

PS: Komodo should play the KingsCrusher with a Knight Odd he would be the perfect match and he would promote Komodo on his Youtube Channel
https://www.youtube.com/watch?v=oSVuKG58ft0

You can challenge KingsCrusher here or Komodo Vs KingsCrusher Knight Odds + Plus Pawn Probably
https://www.chessworld.net/chessclubs/a ... ?from=1053

Here is an interesting game of KingsCrusher ==> https://www.youtube.com/watch?v=jHZ76duAgXA

zullil
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Full name: Louis Zulli

Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by zullil » Fri Jun 26, 2020 9:43 am





Chessqueen
Posts: 1033
Joined: Wed Sep 05, 2018 12:16 am
Full name: Nancy M Pichardo

Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by Chessqueen » Fri Jun 26, 2020 11:36 am

zullil wrote:
Fri Jun 26, 2020 9:43 am



Thanks Zullil, I will have to remind people here that just because Stockfish found the Sacrifice, it does NOT mean that you will also find it using Stockfish, you will also have to have a system or computer as powerful as the one used by the TCEC team, probably Larry Kaufman 32cores might be able to duplicate this amazing move. :roll: :roll:

Chessqueen
Posts: 1033
Joined: Wed Sep 05, 2018 12:16 am
Full name: Nancy M Pichardo

Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by Chessqueen » Fri Jun 26, 2020 11:44 am

Chessqueen wrote:
Fri Jun 26, 2020 4:47 am
I believe that most engines rated above 3300 will also sacrifice the Rook with the same position. Correct me if I am wrong and let me know which engine rated above 3300 does NOT Sacrifice the Rook?
https://www.youtube.com/watch?v=UexQmPtUZaM

PS: Komodo should play the KingsCrusher with a Knight Odd he would be the perfect match and he would promote Komodo on his Youtube Channel
https://www.youtube.com/watch?v=oSVuKG58ft0

You can challenge Tryfon Cavriel here or Komodo Vs Tryfon Gavriel FIDE 2145+ Knight Odds
https://www.chessworld.net/chessclubs/a ... ?from=1053

OR https://www.linkedin.com/in/tryfon-gavriel-23b9a74a

Here is an interesting game of Tryfon Gavriel Known as KingsCrusher ==> https://www.youtube.com/watch?v=jHZ76duAgXA

zullil
Posts: 6339
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by zullil » Fri Jun 26, 2020 12:02 pm

Chessqueen wrote:
Fri Jun 26, 2020 11:36 am
zullil wrote:
Fri Jun 26, 2020 9:43 am

Thanks Zullil, I will have to remind people here that just because Stockfish found the Sacrifice, it does NOT mean that you will also find it using Stockfish, you will also have to have a system or computer as powerful as the one used by the TCEC team, probably Larry Kaufman 32cores might be able to duplicate this amazing move. :roll: :roll:
About 12 seconds for Stockfish-dev, starting from an empty hash table:

info depth 29 seldepth 57 multipv 1 score cp 254 nodes 420223443 nps 32997522 hashfull 94 tbhits 316478 time 12735 pv b7g7 h8g7 b1g6 g7f8 g6h6 f8g8 h6g6 g8f8 g6f6 f8g8 h5h6 a8b7 f6g6 g8f8 h6h7 b7g7 g6h5 f8e7 g3h4 e7d7 h4f6 g7g4 h5g4 e3g4 h7h8q e8h8 f6h8 c6a7 a2a3 a7b5 a3b3 d7c6 f4f5 b5c7 f5e6 c7e6 b3a3 e6f4 a3a8 g4e3 h8f6 e3c4 g1h2

Chessqueen
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Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by Chessqueen » Fri Jun 26, 2020 8:31 pm

zullil wrote:
Fri Jun 26, 2020 12:02 pm
Chessqueen wrote:
Fri Jun 26, 2020 11:36 am
zullil wrote:
Fri Jun 26, 2020 9:43 am

Thanks Zullil, I will have to remind people here that just because Stockfish found the Sacrifice, it does NOT mean that you will also find it using Stockfish, you will also have to have a system or computer as powerful as the one used by the TCEC team, probably Larry Kaufman 32cores might be able to duplicate this amazing move. :roll: :roll:
About 12 seconds for Stockfish-dev, starting from an empty hash table:

info depth 29 seldepth 57 multipv 1 score cp 254 nodes 420223443 nps 32997522 hashfull 94 tbhits 316478 time 12735 pv b7g7 h8g7 b1g6 g7f8 g6h6 f8g8 h6g6 g8f8 g6f6 f8g8 h5h6 a8b7 f6g6 g8f8 h6h7 b7g7 g6h5 f8e7 g3h4 e7d7 h4f6 g7g4 h5g4 e3g4 h7h8q e8h8 f6h8 c6a7 a2a3 a7b5 a3b3 d7c6 f4f5 b5c7 f5e6 c7e6 b3a3 e6f4 a3a8 g4e3 h8f6 e3c4 g1h2
I left Komodo 13.3 for 10 minutes and after depth 31 it was still considering 1. Bh4 and even at depth 32 after 15 minutes it went back to consider the safer move 1. Rb3 :?: I believe that what makes Stockfish so dangerous is that in any given position it will first evaluate a sacrifice even if it is a Queen Sacrifice and later look at the outcome in the next 15 to 20 moves and if it see any big JUMP in its evaluation it will sacrifice the X piece. Komodo play too conservative and it goes for the safest way as long as it show a positive score. Therefore, just like the killing instinct of Carlsen or any top GMs Stockfish first look at any Sacrifice and later evaluate the outcome within 15 to 20 moves or more and it gets out of its Horizon tunnel vision. I also believe that LCO does the same for any given position where there is any material to take even as small as a pawn, this makes LCo and Stockfish and probably Alliestein so dangerous. :mrgreen:

zullil
Posts: 6339
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
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Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by zullil » Fri Jun 26, 2020 9:22 pm

Chessqueen wrote:
Fri Jun 26, 2020 8:31 pm
zullil wrote:
Fri Jun 26, 2020 12:02 pm
Chessqueen wrote:
Fri Jun 26, 2020 11:36 am
zullil wrote:
Fri Jun 26, 2020 9:43 am

Thanks Zullil, I will have to remind people here that just because Stockfish found the Sacrifice, it does NOT mean that you will also find it using Stockfish, you will also have to have a system or computer as powerful as the one used by the TCEC team, probably Larry Kaufman 32cores might be able to duplicate this amazing move. :roll: :roll:
About 12 seconds for Stockfish-dev, starting from an empty hash table:

info depth 29 seldepth 57 multipv 1 score cp 254 nodes 420223443 nps 32997522 hashfull 94 tbhits 316478 time 12735 pv b7g7 h8g7 b1g6 g7f8 g6h6 f8g8 h6g6 g8f8 g6f6 f8g8 h5h6 a8b7 f6g6 g8f8 h6h7 b7g7 g6h5 f8e7 g3h4 e7d7 h4f6 g7g4 h5g4 e3g4 h7h8q e8h8 f6h8 c6a7 a2a3 a7b5 a3b3 d7c6 f4f5 b5c7 f5e6 c7e6 b3a3 e6f4 a3a8 g4e3 h8f6 e3c4 g1h2
I left Komodo 13.3 for 10 minutes and after depth 31 it was still considering 1. Bh4 and even at depth 32 after 15 minutes it went back to consider the safer move 1. Rb3 :?: I believe that what makes Stockfish so dangerous is that in any given position it will first evaluate a sacrifice even if it is a Queen Sacrifice and later look at the outcome in the next 15 to 20 moves and if it see any big JUMP in its evaluation it will sacrifice the X piece. Komodo play too conservative and it goes for the safest way as long as it show a positive score. Therefore, just like the killing instinct of Carlsen or any top GMs Stockfish first look at any Sacrifice and later evaluate the outcome within 15 to 20 moves or more and it gets out of its Horizon tunnel vision. I also believe that LCO does the same for any given position where there is any material to take even as small as a pawn, this makes LCo and Stockfish and probably Alliestein so dangerous. :mrgreen:
Well, Lc0 (Network 384x30-t60-4229) with 10M nodes doesn't find the sacrifice. Its pre-search assessment is that there's only a 3.57% chance that Rxg7 is best here.

Code: Select all

0626 17:08:47.122671 139805359249152 ../../src/mcts/stoppers/stoppers.cc:66] Stopped search: Reached visits limit: 10000141>=10000000
0626 17:08:47.123175 139805359249152 ../../src/chess/uciloop.cc:222] << info depth 20 seldepth 58 time 576346 nodes 10000141 score cp 120 wdl 676 242 82 nps 17452 tbhits 0 pv b7b3 e3c4 g1h2 e8f8 b1g6 a8c8 h2h3 h8g8 g6b1 f8f7 b3b5 c8a8 b5c5 c6d8 b1b3 d8c6 b3b5 f7c7 b5b1 c7f7 b1g6 c6d8 c5b5 a8c8 b5b1 d8c6 b1b5 c6a7 b5b3 a7c6 g6b1 c8a8 b1g6 a8c8 g6d3 f7f8 d3b1 f8f7

0626 17:08:47.123596 139805359249152 ../../src/mcts/search.cc:415] === Move stats:
0626 17:08:47.123613 139805359249152 ../../src/mcts/search.cc:416] b1d1  (25  ) N:     141 (+ 0) (P:  0.36%) (WL: -0.99265) (D: 0.004) (M: 25.0) (Q: -0.99265) (U: 1.58091) (S:  0.58826) (V: -0.9966) 
0626 17:08:47.123621 139805359249152 ../../src/mcts/search.cc:416] b1e4  (39  ) N:     157 (+ 0) (P:  0.40%) (WL: -0.99390) (D: 0.003) (M: 20.8) (Q: -0.99390) (U: 1.58737) (S:  0.59348) (V: -0.9973) 
0626 17:08:47.123627 139805359249152 ../../src/mcts/search.cc:416] b1h7  (45  ) N:     158 (+ 0) (P:  0.40%) (WL: -0.99414) (D: 0.003) (M: 21.4) (Q: -0.99414) (U: 1.58116) (S:  0.58702) (V: -0.9926) 
0626 17:08:47.123633 139805359249152 ../../src/mcts/search.cc:416] b1a1  (23  ) N:     160 (+ 0) (P:  0.40%) (WL: -0.96774) (D: 0.016) (M: 27.2) (Q: -0.96774) (U: 1.56152) (S:  0.59378) (V: -0.9813) 
0626 17:08:47.123640 139805359249152 ../../src/mcts/search.cc:416] b7e7  (1423) N:     161 (+ 0) (P:  0.40%) (WL: -0.98114) (D: 0.011) (M: 28.3) (Q: -0.98114) (U: 1.57038) (S:  0.58924) (V: -0.9943) 
0626 17:08:47.123646 139805359249152 ../../src/mcts/search.cc:416] b1c2  (32  ) N:     164 (+ 0) (P:  0.41%) (WL: -0.98466) (D: 0.009) (M: 26.0) (Q: -0.98466) (U: 1.57743) (S:  0.59277) (V: -0.9953) 
0626 17:08:47.123652 139805359249152 ../../src/mcts/search.cc:416] b1f1  (27  ) N:     165 (+ 0) (P:  0.42%) (WL: -0.99235) (D: 0.004) (M: 26.3) (Q: -0.99235) (U: 1.58309) (S:  0.59075) (V: -0.9960) 
0626 17:08:47.123658 139805359249152 ../../src/mcts/search.cc:416] b1b4  (38  ) N:     168 (+ 0) (P:  0.43%) (WL: -0.99417) (D: 0.003) (M: 19.6) (Q: -0.99417) (U: 1.58833) (S:  0.59416) (V: -0.9935) 
0626 17:08:47.123664 139805359249152 ../../src/mcts/search.cc:416] b1f5  (41  ) N:     172 (+ 0) (P:  0.43%) (WL: -0.98881) (D: 0.007) (M: 23.9) (Q: -0.98881) (U: 1.57586) (S:  0.58706) (V: -0.9973) 
0626 17:08:47.123670 139805359249152 ../../src/mcts/search.cc:416] b7a7  (1420) N:     172 (+ 0) (P:  0.43%) (WL: -0.97113) (D: 0.018) (M: 31.7) (Q: -0.97113) (U: 1.56270) (S:  0.59157) (V: -0.9832) 
0626 17:08:47.123676 139805359249152 ../../src/mcts/search.cc:416] b1e1  (26  ) N:     172 (+ 0) (P:  0.42%) (WL: -0.92654) (D: 0.035) (M: 31.3) (Q: -0.92654) (U: 1.52042) (S:  0.59389) (V: -0.5072) 
0626 17:08:47.123683 139805359249152 ../../src/mcts/search.cc:416] b7b8  (1428) N:     173 (+ 0) (P:  0.44%) (WL: -0.98354) (D: 0.010) (M: 27.1) (Q: -0.98354) (U: 1.57783) (S:  0.59429) (V: -0.9948) 
0626 17:08:47.123689 139805359249152 ../../src/mcts/search.cc:416] a2b2  (197 ) N:     180 (+ 0) (P:  0.40%) (WL: -0.81500) (D: 0.084) (M: 28.4) (Q: -0.81500) (U: 1.40222) (S:  0.58722) (V: -0.9306) 
0626 17:08:47.123695 139805359249152 ../../src/mcts/search.cc:416] b1b2  (31  ) N:     182 (+ 0) (P:  0.43%) (WL: -0.88678) (D: 0.042) (M: 36.1) (Q: -0.88678) (U: 1.48123) (S:  0.59445) (V: -0.2131) 
0626 17:08:47.123701 139805359249152 ../../src/mcts/search.cc:416] b7b4  (1410) N:     184 (+ 0) (P:  0.43%) (WL: -0.87414) (D: 0.074) (M: 37.4) (Q: -0.87414) (U: 1.46522) (S:  0.59108) (V: -0.8130) 
0626 17:08:47.123707 139805359249152 ../../src/mcts/search.cc:416] b1c1  (24  ) N:     197 (+ 0) (P:  0.48%) (WL: -0.93811) (D: 0.030) (M: 30.7) (Q: -0.93811) (U: 1.53069) (S:  0.59257) (V: -0.4083) 
0626 17:08:47.123713 139805359249152 ../../src/mcts/search.cc:416] a2c2  (198 ) N:     209 (+ 0) (P:  0.51%) (WL: -0.94482) (D: 0.034) (M: 27.5) (Q: -0.94482) (U: 1.53913) (S:  0.59431) (V: -0.9850) 
0626 17:08:47.123719 139805359249152 ../../src/mcts/search.cc:416] b1d3  (37  ) N:     232 (+ 0) (P:  0.56%) (WL: -0.92012) (D: 0.028) (M: 31.2) (Q: -0.92012) (U: 1.51326) (S:  0.59314) (V: -0.4114) 
0626 17:08:47.123725 139805359249152 ../../src/mcts/search.cc:416] a2g2  (202 ) N:     347 (+ 0) (P:  0.50%) (WL: -0.30410) (D: 0.419) (M: 53.2) (Q: -0.30410) (U: 0.89881) (S:  0.59471) (V: -0.8777) 
0626 17:08:47.123737 139805359249152 ../../src/mcts/search.cc:416] g1h1  (153 ) N:     385 (+ 0) (P:  0.55%) (WL: -0.30454) (D: 0.380) (M: 67.2) (Q: -0.30454) (U: 0.89885) (S:  0.59430) (V: -0.1179) 
0626 17:08:47.123745 139805359249152 ../../src/mcts/search.cc:416] a2h2  (203 ) N:     427 (+ 0) (P:  0.47%) (WL: -0.10225) (D: 0.449) (M: 58.1) (Q: -0.10225) (U: 0.69580) (S:  0.59355) (V: -0.3555) 
0626 17:08:47.123751 139805359249152 ../../src/mcts/search.cc:416] a2f2  (201 ) N:     472 (+ 0) (P:  0.53%) (WL: -0.10754) (D: 0.440) (M: 59.3) (Q: -0.10754) (U: 0.70184) (S:  0.59430) (V: -0.2877) 
0626 17:08:47.123757 139805359249152 ../../src/mcts/search.cc:416] a2d2  (199 ) N:     484 (+ 0) (P:  0.50%) (WL: -0.05940) (D: 0.459) (M: 59.8) (Q: -0.05940) (U: 0.65431) (S:  0.59491) (V: -0.2756) 
0626 17:08:47.123763 139805359249152 ../../src/mcts/search.cc:416] b1b3  (35  ) N:     496 (+ 0) (P:  1.02%) (WL: -0.69209) (D: 0.158) (M: 58.0) (Q: -0.69209) (U: 1.28427) (S:  0.59218) (V:  0.2423) 
0626 17:08:47.123769 139805359249152 ../../src/mcts/search.cc:416] b7b2  (1406) N:     510 (+ 0) (P:  0.73%) (WL: -0.30331) (D: 0.352) (M: 57.3) (Q: -0.30331) (U: 0.89787) (S:  0.59455) (V: -0.0154) 
0626 17:08:47.123775 139805359249152 ../../src/mcts/search.cc:416] g1f2  (155 ) N:     515 (+ 0) (P:  0.79%) (WL: -0.36851) (D: 0.361) (M: 56.5) (Q: -0.36851) (U: 0.96328) (S:  0.59477) (V:  0.1016) 
0626 17:08:47.123781 139805359249152 ../../src/mcts/search.cc:416] g3h2  (605 ) N:     581 (+ 0) (P:  0.60%) (WL: -0.05189) (D: 0.497) (M: 56.1) (Q: -0.05189) (U: 0.64620) (S:  0.59431) (V: -0.2754) 
0626 17:08:47.123787 139805359249152 ../../src/mcts/search.cc:416] a2e2  (200 ) N:     887 (+ 0) (P:  0.93%) (WL: -0.06320) (D: 0.469) (M: 65.9) (Q: -0.06320) (U: 0.65749) (S:  0.59429) (V: -0.0132) 
0626 17:08:47.123793 139805359249152 ../../src/mcts/search.cc:416] c3c4  (485 ) N:     940 (+ 0) (P:  0.56%) (WL:  0.21943) (D: 0.447) (M: 49.3) (Q:  0.21943) (U: 0.37559) (S:  0.59502) (V:  0.0144) 
0626 17:08:47.123799 139805359249152 ../../src/mcts/search.cc:416] a2a1  (194 ) N:    1269 (+ 0) (P:  1.18%) (WL:  0.01114) (D: 0.502) (M: 53.7) (Q:  0.01114) (U: 0.58320) (S:  0.59434) (V:  0.0264) 
0626 17:08:47.123805 139805359249152 ../../src/mcts/search.cc:416] b7b5  (1413) N:    1281 (+ 0) (P:  1.06%) (WL:  0.07441) (D: 0.429) (M: 69.3) (Q:  0.07441) (U: 0.51995) (S:  0.59436) (V: -0.0753) 
0626 17:08:47.123811 139805359249152 ../../src/mcts/search.cc:416] a2a3  (204 ) N:    1617 (+ 0) (P:  1.83%) (WL: -0.11808) (D: 0.537) (M: 35.2) (Q: -0.11808) (U: 0.71281) (S:  0.59473) (V:  0.2625) 
0626 17:08:47.123817 139805359249152 ../../src/mcts/search.cc:416] b7d7  (1422) N:    1751 (+ 0) (P:  1.22%) (WL:  0.15883) (D: 0.443) (M: 58.0) (Q:  0.15883) (U: 0.43603) (S:  0.59486) (V:  0.2627) 
0626 17:08:47.123823 139805359249152 ../../src/mcts/search.cc:416] b7f7  (1424) N:    2084 (+ 0) (P:  1.20%) (WL:  0.23296) (D: 0.418) (M: 52.4) (Q:  0.23296) (U: 0.36191) (S:  0.59487) (V:  0.3167) 
0626 17:08:47.123829 139805359249152 ../../src/mcts/search.cc:416] g3e1  (598 ) N:    2395 (+ 0) (P:  1.72%) (WL:  0.14271) (D: 0.453) (M: 52.4) (Q:  0.14271) (U: 0.45233) (S:  0.59504) (V:  0.1216) 
0626 17:08:47.123835 139805359249152 ../../src/mcts/search.cc:416] b7b6  (1417) N:    3259 (+ 0) (P:  3.34%) (WL: -0.04930) (D: 0.418) (M: 57.0) (Q: -0.04930) (U: 0.64430) (S:  0.59501) (V:  0.1007) 
0626 17:08:47.123841 139805359249152 ../../src/mcts/search.cc:416] g1h2  (157 ) N:    3658 (+ 0) (P:  2.69%) (WL:  0.13189) (D: 0.438) (M: 52.6) (Q:  0.13189) (U: 0.46291) (S:  0.59479) (V:  0.1858) 
0626 17:08:47.123847 139805359249152 ../../src/mcts/search.cc:416] f4f5  (830 ) N:    6116 (+ 0) (P:  3.56%) (WL:  0.22871) (D: 0.383) (M: 59.2) (Q:  0.22871) (U: 0.36627) (S:  0.59498) (V:  0.4832) 
0626 17:08:47.123854 139805359249152 ../../src/mcts/search.cc:416] b1g6  (43  ) N:    8138 (+ 0) (P:  6.66%) (WL:  0.08095) (D: 0.547) (M: 42.0) (Q:  0.08095) (U: 0.51402) (S:  0.59497) (V:  0.2076) 
0626 17:08:47.123859 139805359249152 ../../src/mcts/search.cc:416] b7c7  (1421) N:    9210 (+ 0) (P:  5.50%) (WL:  0.21984) (D: 0.415) (M: 60.5) (Q:  0.21984) (U: 0.37516) (S:  0.59500) (V:  0.3746) 
0626 17:08:47.123869 139805359249152 ../../src/mcts/search.cc:416] b7g7  (1425) N:   17378 (+ 1) (P:  3.57%) (WL:  0.46607) (D: 0.303) (M: 54.9) (Q:  0.46607) (U: 0.12897) (S:  0.59504) (V:  0.7664) 
0626 17:08:47.123875 139805359249152 ../../src/mcts/search.cc:416] b1b6  (42  ) N:   18744 (+ 0) (P:  2.75%) (WL:  0.50292) (D: 0.298) (M: 59.3) (Q:  0.50292) (U: 0.09212) (S:  0.59504) (V:  0.3197) 
0626 17:08:47.123881 139805359249152 ../../src/mcts/search.cc:416] g3h4  (616 ) N:   22826 (+ 0) (P:  6.42%) (WL:  0.41814) (D: 0.376) (M: 42.1) (Q:  0.41814) (U: 0.17689) (S:  0.59502) (V:  0.4919) 
0626 17:08:47.123887 139805359249152 ../../src/mcts/search.cc:416] b1b5  (40  ) N:   24193 (+ 0) (P:  5.75%) (WL:  0.44568) (D: 0.287) (M: 54.2) (Q:  0.44568) (U: 0.14933) (S:  0.59502) (V:  0.4229) 
0626 17:08:47.123893 139805359249152 ../../src/mcts/search.cc:416] g4g5  (861 ) N:   35523 (+ 0) (P:  7.97%) (WL:  0.45410) (D: 0.350) (M: 70.7) (Q:  0.45410) (U: 0.14093) (S:  0.59504) (V:  0.3560) 
0626 17:08:47.123899 139805359249152 ../../src/mcts/search.cc:416] g3f2  (603 ) N:   62061 (+ 0) (P: 14.25%) (WL:  0.45069) (D: 0.331) (M: 56.9) (Q:  0.45069) (U: 0.14434) (S:  0.59503) (V:  0.4568) 
0626 17:08:47.123905 139805359249152 ../../src/mcts/search.cc:416] b7b3  (1408) N: 9769446 (+31) (P: 14.39%) (WL:  0.59412) (D: 0.242) (M: 65.8) (Q:  0.59412) (U: 0.00093) (S:  0.59504) (V:  0.4795) 
0626 17:08:47.123911 139805359249152 ../../src/mcts/search.cc:416] node  (  47) N: 10000141 (+32) (P: 100.0%) (WL:  0.58876) (D: 0.244) (M: 66.5) (Q:  0.58876) (V:  0.5747) 



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Dr.Wael Deeb
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Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by Dr.Wael Deeb » Fri Jun 26, 2020 9:28 pm

A mind blowing sacrifice indeed ....

What a tactical monster :shock:

Dr.D
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….

MikeGL
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Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by MikeGL » Sat Jun 27, 2020 3:51 am



At this point of the game, Lc0 is already too passive and is losing. Too late to save the game.
There are 8 or 9 winning moves together with Rxg7. This could be the reason why Rxg7 is not picked up quickly, because position of white has overwhelming advantage already, at least according to SF on my machine.

Real beautiful puzzles or combinations are those with losing or drawing position, then turned around by just a single powerful move.
So in my opinion, this R sacrifice is not that great at all.

Case in point, this post of Vinvin here viewtopic.php?f=2&t=74051
has the qualities of my point above where the position is almost equal or losing but was quickly turned around by just a single difficult move.
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.

jp
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Re: Why is this Rook Sacrifice is SO GREAT ? ? ?

Post by jp » Sat Jun 27, 2020 5:18 am

Rxg7+ looks like an obvious thing to consider.

Is it objectively the best move?

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