Fascinating imbalance

[peter]

Hi Jon!

The last is from "The Exchange Sacrifice" by Sergey Kasparov.

Static evaluation: = 227 (0.92)

[d]r1b1kb1r/1p3ppp/1Rnp1n2/8/4P3/2N2P2/P1PQ2PP/4K2R b Kkq - 0 14

https://hxim.github.io/Stockfish-Evaluation-Guide/

Do you have a line of Kasparov's too maybe? Would be interesting as for Forward- Backward compared to pure engine- lines' ones

[Nordlandia]

Hi Jon!

The last is from "The Exchange Sacrifice" by Sergey Kasparov.

Static evaluation: = 227 (0.92)

[d]r1b1kb1r/1p3ppp/1Rnp1n2/8/4P3/2N2P2/P1PQ2PP/4K2R b Kkq - 0 14

https://hxim.github.io/Stockfish-Evaluation-Guide/

Do you have a line of Kasparov's too maybe? Would be interesting as for Forward- Backward compared to pure engine- lines' ones

The analysis provided in that book is from Houdini 4, so relatively old.

Here is few interesting imbalances ->

[d]r1b4r/1pb2pkp/2n2np1/3p4/5P2/2PB4/PP2Q1PP/R4RK1 b - - 0 19

[d]r1b3k1/1pbpn1pp/2n1pr2/8/2B2P2/2P2Q2/PP4PP/1K1R3R w - - 0 21

[d]r1b1k2r/1pb2ppp/2n1p3/3n4/8/2PB4/PP3PPP/R2Q1RK1 w kq - 0 16

[d]rnb3k1/pp2bppp/5nr1/8/2P5/8/PPQ2PPP/R1B2RK1 w - - 0 18

[d]r1b1k2r/pp1n1p1p/5np1/4b3/4P3/6P1/PP3PBP/R1Q2RK1 b kq - 0 17

[d]r1b1k2r/1pb2ppp/2n2n2/3p4/8/2PB4/PP3PPP/R2QK2R w KQkq - 0 16

[d]r1b1k1nr/1pbp1ppp/2n1p3/8/4P3/2P5/PP3PPP/R2QKB1R w KQkq - 0 13

[d]1r5r/1pkbbpp1/2npp1n1/6P1/4PP2/6R1/PPP2Q2/2KR1B2 w - - 0 24

[d]r3k2r/1b1nbp1p/pp2n3/3p2P1/5PQ1/8/PPP4P/R1B1R2K b kq - 0 21

[d]3k4/p1r3bp/1p2b3/1PP1p3/Q2n1pnP/8/P4PP1/2R1R1K1 b - - 0 31

[d]r7/ppnkp3/2p3pb/5b2/2PP1n2/5QR1/PP3P1P/3RK3 b - - 0 23

[d]5rk1/p4p2/1p1p1Bpp/2q1r3/3NP3/1BN5/PPP3PP/3R2K1 w - - 0 23

[d]5r2/bp1b2pk/p1n1p1np/3p2BQ/5p2/2P5/PP3PPP/R4RK1 w - - 0 23

[d]3nkbnr/1p4p1/2bp1pp1/1p2p3/8/3Q4/PPP2PPP/R4RK1 b k - 0 17

[d]r3kn2/1b3p2/p1pPp3/1p1n2bp/P1pP4/5Q2/1P3PPP/R4RK1 b q - 0 18

[Nordlandia]

Variation from Sveshnikov.

[d]B5bk/q5bp/p2p4/1p2p3/6N1/2P5/PP3PPP/R4RK1 w - - 0

[d]rnb1k2b/pp5p/6p1/3n4/8/8/PP2NPPP/R1B1K2R w KQq - 0 17

[Nordlandia]

[d]rnb3k1/p3qpbp/2p3p1/2n5/4P3/2N1QP2/PP2B1PP/R4RK1 w - - 0 18

https://lichess.org/9sCBLFaU#34

[Nordlandia]

[d]2B3k1/p4pp1/7p/5P2/2pr2P1/PpN1n2P/1P6/R1K5 b - - 0 27

https://lichess.org/vRKHWAUI#53

[Nordlandia]

[d]3r1rk1/pp3ppp/2n5/3p4/1b4P1/1PN4P/PBPP1PB1/2K4R b - - 0 17

[d]4kb1r/1p1b1ppp/2n1p3/p2pP3/1P3P2/P1N5/4B1PP/R4RK1 w k - 0 16

[d]4k2r/1b1p1ppp/p1nbp3/8/Pp3P2/3PBN2/1P4PP/R3K2R b KQk - 0 17

[d]1r1k1b1r/p4p2/5n1p/P2p1Np1/1p1P4/3B1P2/1PPB2PP/R5K1 b - - 0 23

[d]2k2b1r/1pp1pppp/p4nb1/8/6P1/7P/PPPN1PB1/R4RK1 w - - 0 18

[d]N1bk1b1r/1p2pppp/p2p4/6n1/8/2N5/PPP2PPP/R3K2R b KQ - 0 13

[Nordlandia]

Fabricated position, originating from this -

Code: Select all

https://cdn.pbrd.co/images/gskOemVcW.png

[d]4k3/1p4pb/r1n1p2p/3p4/p2P4/4B3/PP3PPP/2RR1K2 b - - 0 1

[peter]

Hi Jon!

Fabricated position, originating from this -

Code: Select all

https://cdn.pbrd.co/images/gskOemVcW.png

[d]4k3/1p4pb/r1n1p2p/3p4/p2P4/4B3/PP3PPP/2RR1K2 b - - 0 1

Static endgame- eval
(
https://hxim.github.io/Stockfish-Evaluation-Guide/
)
is 2.07,
dynamic eval after some FW- BW is:

4k3/1p4pb/r1n1p2p/3p4/p2P4/4B3/PP3PPP/2RR1K2 b - - 0 1

Analysis by McBrain 2.4b 64 POPCNTT:

1...Rb6 2.Rd2 Na5 3.b3 axb3 4.axb3 Rxb3 5.Rc7 Nc4 6.Rd1 Rxe3 7.fxe3 Nxe3+ 8.Ke1 Nxd1 9.Kxd1 Kf8 10.Rxb7 Be4 11.g3 Kg8 12.Kd2 Kh7 13.Kc3 e5 14.Re7 exd4+ 15.Kxd4 Kg6 16.Ke5 Bf3 17.Rd7 Be4 18.Ra7 Kh7 19.Kf4 Kg6 20.Ra6+ Kh7 21.Rd6 Kg8 22.Rd7 Kh7 23.Rc7 Kg6 24.Ke5 Kh7 25.h4 Kg6 26.Ra7 Bf3 27.Rb7 Be4 28.Rc7
+- (1.72) Depth: 40/64 00:05:09 6589MN, tb=234693

Now one could think if dynamic eval is lower than static one, drawish lines within search- horizon probably would be the reason for that.

Will let it play out, what are your bets for that?

And if you think it's won, how long do you think the game will go on?

[Nordlandia]

Hi Peter!

Some guys on Lichess forum say that this position is lost even for human perspective.

https://lichess.org/forum/game-analysis ... e-exchange

[peter]

And what do you say, Jon?