Fascinating imbalance

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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

Dann Corbit: thanks for the collection :)

White sacrifices the exchange for some positional compensation, although the sacrifice is not entirely sound | -0.50

He gets the bishop pair and causes structural damage in the black camp.

Usable compensation | Nice position for engine testing.

[d]rn1r2k1/pp2bppp/2p1bn2/8/2PP4/2NB1N2/PP1B2PP/4RRK1 w - - 0 15

[d]rn1r2k1/pp2b1pp/2p1pn2/8/2PP4/2NB1N2/PP1B2PP/4R1K1 b - - 0 16

[pgn][Event "Taiyuan Tournament"]
[Site "Taiyuan CHN"]
[Date "2007.07.04"]
[Round "1"]
[White "Vadim Zvjaginsev"]
[Black "Wang Hao"]
[Result "*"]
[ECO "C36"]
[WhiteElo "2658"]
[BlackElo "2624"]
[SetUp "1"]
[FEN "rnbr2k1/pp2bppp/2p2n2/8/2PP4/2NB1N2/PP1B2PP/4RRK1 b - - 0 14"]
[PlyCount "4"]
[EventDate "2007.07.04"]

14... Be6 15. Rxe6 (15. Ne2 Nbd7 16. Nf4 Nf8 17. Bc3 Bd6 18. Nxe6 Nxe6 19. Bf5
Nc7 20. Ba5 Nfe8 21. Ng5 g6 22. Bh3 b6 23. Bc3 f6 24. Ne6 Nxe6 25. Bxe6+ Kg7
26. g4 h6 27. Kg2 a5 28. d5 c5 29. h4 g5 30. hxg5 hxg5 31. Bf5 Nc7 32. Bc2 Rf8
33. Rf5 Rae8 34. Rxg5+ Kf7 35. Bg6+ Kg8 36. Bxf6) 15... fxe6 16. Re1 *[/pgn]

------------------

Black has a pawn and the bishop pair for the exchange, is it enough compensation for a draw?

[d]r7/2p1kppp/p7/1p2bb2/8/N1P3P1/PP1R3P/R4K2 b - - 0 23
«Adding the better cooperation of the rook with the bishops, many soviet theoreticians believed that, in active positions rook and two bishops outperform two rooks and a knight»
[d]4r1r1/pppk2pp/4n3/8/1B2R3/3P3B/PPP2P1P/2K5 b - - 0 23
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

[d]4r3/pp3k2/n1pB2pp/4P3/2P5/1P4PB/3r1P1P/4RK2 w - - 0 25

[d]r3r3/pp3k2/n1p3pp/4P3/2P5/1P4P1/PB3PBP/4RK2 b - - 0 21

[d]2r5/pb3pkp/1p3bp1/3p4/8/P4N2/1P1R1PPP/4R1K1 w - - 0 28

[d]8/pb1k1ppp/1p3b2/3p4/8/P4N2/1P3PPP/3R2K1 w - - 0 22

[d]8/p2r1k1p/1p2pbp1/1N1b4/6p1/8/PP3PPP/2RR2K1 w - - 0 27
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

⚖️ | -0.70

[d]2rq1n2/1bp2k2/pp6/8/3P4/3NP1B1/PP3PPP/R4RK1 b - - 0 4
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

⚖️ | +1.00

[d]Q7/2kb3R/p1p1p3/2b1p3/2r3K1/8/8/8 w - - 0 6

⚖️ | +1.25

[d]r4rk1/5pp1/p6p/4q3/Np1p4/1P1B4/1PP3Q1/1K4R1 w - - 0 26
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

[d]8/p4pk1/1pR3p1/2n1r2p/3Rp3/4K1PP/P4P2/8 w - - 0 1

[d]5k2/2p1b1pp/8/2n2p2/1N6/1p3P2/4RPKP/8 w - - 0 7
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

[d]6k1/pbq2pbp/1p4p1/4n3/3p4/P2B3P/1P1NQPP1/4R1K1 w - - 0 23

[d]6k1/pbq2pbp/1p4p1/8/3p4/P2N3P/1P2QPP1/4R1K1 b - - 0 23

⚖️ | +0.75 | An very unusual evaluation

[d]8/pb3pbp/1p1k2p1/8/3p4/P2N3P/1P3PP1/4RK2 w - - 0 23

Interesting exchange sacrifice ->

[pgn][Event "KAZ-ch Men 2017"]
[Site "Almaty"]
[Date "2017.04.14"]
[Round "4"]
[White "Kostenko, Petr"]
[Black "Agmanov, Zhandos"]
[Result "*"]
[ECO "C11"]
[WhiteElo "2440"]
[BlackElo "2377"]
[Annotator "ChessBase"]
[PlyCount "55"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "KAZ"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[TimeControl "40/5400+30:1800+30"]

1. e4 {0} e6 {53} 2. d4 {0} d5 {17} 3. Nc3 {29} Nf6 {114} 4. e5 {76} Nfd7 {17}
5. Nce2 {64} c5 {96} 6. c3 {5} Nc6 {46} 7. Nf3 {27} Be7 {146} 8. g3 {34} b5 {
171} 9. a3 {128} a5 {87} 10. Nf4 {375} Ba6 {122} 11. h4 {262} cxd4 {277} 12.
cxd4 {7} b4 {18} 13. a4 {72} b3 {213} 14. Bxa6 {182} Rxa6 {116} 15. Qxb3 {22}
Rb6 {477} 16. Qd1 {54} Rb4 {121} 17. Nd3 {335} Nxd4 {193} 18. Nxb4 {6} Nxf3+ {
76} 19. Qxf3 {5} Bxb4+ {22} 20. Kf1 {8} Nxe5 {58} 21. Qe2 {18} Nd7 {62} 22. Bg5
{74} Qb6 {85} 23. Kg2 {475} O-O {71} 24. Rhc1 {20} e5 {253} 25. Qb5 {526} Qxb5
{52} 26. axb5 {5} f6 {64} 27. Rc7 {19} Nb6 {834} 28. Bc1 {16} *

[/pgn]

[d]3qk2r/3n1ppp/4p3/p2pP3/Pb5P/5QP1/1P3P2/R1B2K1R b k - 0 20
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Nordlandia
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Re: Fascinating imbalance

Post by Nordlandia »

[d]r1q5/1p4pk/pPp2pnp/P1Q1p3/1N2P2P/3B1NP1/1B5K/3r4 b - - 0 34

[d]r5k1/pp3pnp/2pp2pB/4q3/2P1r1P1/1P5B/P3NP2/Q3NK2 w - - 0 22

[d]1k6/pbp2q2/1pn2b2/3p1Q2/3P1p2/2P5/PPK2PPP/RN6 w - - 0 23

[d]8/1bp3bp/2n1knp1/1p2p3/1P2P3/2P4P/3N1PP1/R4RK1 w - - 0 28

[d]1nb1qb1k/6pp/p1p2n2/Pp2P3/3P4/1QN5/1P3PPP/R4RK1 b - - 0 18

[d]2b1kb2/3nnp1p/3p2p1/P3p1P1/1P2qP1P/3QB3/2P2K2/R5R1 b - - 0 25

[d]2r1r3/1p4k1/pBq5/1b1Np1p1/1Qp1PpP1/5P2/1P1NB1K1/8 w - - 0 37

[d]r1b2r2/pp3pkp/6p1/4p2q/3PP3/1Q4PP/P5B1/NN4BK w - - 0 24

[d]3r1rk1/p1p1p3/2p4p/4Npp1/q3N1P1/7b/P2BPP1P/2Q3KB w - - 0 25

[d]Q1b3k1/p1q2n1p/1pn2bp1/2p5/5P2/3PB3/PPP3PP/R4RK1 w - - 0 18

[d]1r2k2r/1p1bpp1p/p2p2p1/8/1qP1PN2/2NPB1P1/5KBP/Q7 b k - 0 19

[d]2r1k2r/2q1bppp/p2pp3/1p6/5PP1/1N6/NPPB3P/2KB3Q b k - 0 19

[d]5k2/4b1pp/bq1p1n2/2p2p2/Q1n5/P1P1P1BP/1P3PP1/2KR3R w - - 0 26

[d]5rk1/pp2pp1p/3pb1p1/qN6/P3P3/5N2/4BPPP/2Q3K1 w - - 0 20

[d]5b1k/p3p2p/1pb1q1p1/2P1Pn2/2n2P2/2PQ4/P4BPP/R3R1K1 b - - 0 25

[d]n1b2k2/pp2b1pp/2qp4/4nP2/4P3/8/PPP3PP/R1B1QRK1 w - - 0 18

[d]r1b2rk1/1pp1q1pp/3p4/p4p2/2P5/1P1N2P1/PB1QN1BP/5K2 b - - 0 19

[d]5bk1/pp3bq1/n2n2p1/2pp4/3P4/2P1QP1R/PPB2P1P/R6K b - - 0 30

[d]5bk1/pp3b2/n2n2p1/2pp4/3P4/2P2P1R/PPB2P1P/R6K b - - 0 30

[d]8/1b3kp1/2nb1n2/pp5p/2pP1P2/P1P1B3/1P4PP/R4RK1 b - - 0 22

[d]1k3b2/1p1bpN1p/5np1/3P4/1pP5/3n4/PP2KPPP/R6R b - - 0 21

[d]1k3b2/1p1bpN1p/5np1/3P4/1pP5/3n4/PP2KPPP/R6R b - - 0 21

[d]r5k1/pp4np/2ppr1p1/5pP1/2P2B2/1P5B/P3NP2/4NK2 w - f6 0 25
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peter
Posts: 3185
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Fascinating imbalance

Post by peter »

Too many diagrams in one posting, Jon.

Took the last one here, that I was able to paste into a GUI. Aqua after F14, F15, chessbase, Shredder13, Hiarcs CE, and Arena used for the first ones already.
:)
Nordlandia wrote:
[d]2b1kb2/3nnp1p/3p2p1/P3p1P1/1P2qP1P/3QB3/2P2K2/R5R1 b - - 0 25
Isn't that simply a clear win for White?

2b1kb2/3nnp1p/3p2p1/P3p1P1/1P2qP1P/3QB3/2P2K2/R5R1 b - - 0 1

Analysis by pedantFishW_2017-04-08_popcnt:

25...Qa8 26.a6 Bg7 27.c3 Nf5 28.Rgd1 exf4 29.Bxf4 Ne5 30.Bxe5 Bxe5 31.a7 Be6 32.Ra5 Kf8 33.Rxe5 Qxa7+ 34.Re3 Kg8 35.Qe4 d5 36.Qe5 Kf8 37.Qf4 Ke7 38.Kf3 Nxe3 39.Qxe3 Qa2 40.Kg3 Kf8 41.Qc5+ Ke8 42.Qd4 Qa4 43.Re1 Kd7 44.Kf2 Qa3 45.Rd1 Kc6 46.Kg3 Kd7 47.Qd3 Ke7 48.Re1 Qb2 49.Qe3 Ke8 50.Qc5 Qd2 51.Qc8+ Ke7 52.Qc7+ Kf8 53.Qd6+ Ke8
+- (3.32) Depth: 37/57 00:01:24 2429MN
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peter
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Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Fascinating imbalance

Post by peter »

Nordlandia wrote:
[d]1nb1qb1k/6pp/p1p2n2/Pp2P3/3P4/1QN5/1P3PPP/R4RK1 b - - 0 18
The one before isn't quite as clear maybe, yet I'd lay some bets on 1-0 too:

1nb1qb1k/6pp/p1p2n2/Pp2P3/3P4/1QN5/1P3PPP/R4RK1 b - - 0 1

Analysis by pedantFishW_2017-04-08_popcnt:

18...Be6 19.Qc2 Nd5 20.Nxd5 Bxd5 21.f4 Bb4 22.f5 Nd7 23.Rf4 Nf8 24.Rg4 Bc4 25.b3 Bd5 26.Qf2 Qh5 27.h3 Qf7 28.Rf1 Bxa5 29.e6 Qf6 30.Ra1 Bb4 31.Rxa6 Be7 32.Ra7 Bxb3 33.Qe3 Bc2 34.Rf4 b4 35.g4 b3 36.Rb7 h5 37.Rf2 Kg8 38.Qe5 Qxe5 39.dxe5 hxg4 40.Rxe7 b2
+- (2.18) Depth: 37/56 00:04:30 6959MN
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peter
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Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Fascinating imbalance

Post by peter »

Nordlandia wrote: [d]3r1rk1/p1p1p3/2p4p/4Npp1/q3N1P1/7b/P2BPP1P/2Q3KB w - - 0 25
The next one I wouldn't call imbalanced only but rather won, this time for Black, isn't it, Jon?

3r1rk1/p1p1p3/2p4p/4Npp1/q3N1P1/7b/P2BPP1P/2Q3KB w - - 0 1

Analysis by pedantFishW_2017-04-08_popcnt:

25.gxf5 Rxf5 26.Nd3 Rb5 27.Bf3 Qxa2 28.Nc3 Qc4 29.Nb2 Qd4 30.Nd3 Ra5 31.Be4 Bf5 32.Bxf5 Rxf5 33.Be3 Qc4 34.Nb2 Qg4+ 35.Kh1 Rd6 36.Qb1 Kg7 37.Qa1 Kf8 38.Qc1 a5 39.Qc2 Qh3 40.Kg1 Re6 41.Qd3 Rxe3 42.Qxe3 Qxe3 43.fxe3 Rc5 44.Nca4 Rc1+ 45.Kf2 Rh1 46.Kg2 Ra1 47.Nc3 Ra3 48.Nbd1 Kf7 49.Kg1 Ke6 50.Kf2 a4
-+ (-2.28) Depth: 37/84 00:05:45 9852MN
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