New EG puzzles to solve

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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: New EG puzzles to solve

Post by Nordlandia »

Vinvin wrote: Thu Feb 11, 2021 2:38 pm
Nordlandia wrote: Thu Feb 11, 2021 9:06 am Try 1. Nxd2 with 50-move rule disabled.

5rk1/5p2/5R2/6PK/2b1N3/3N4/pQnp3n/8 w - - 0 1
Do you want to change the rules of chess ? :-)
There is some individuals that insist that 50-move rule does not apply for certain studies.

By the way, this puzzle is hard.

J. Polasek
[d]1n6/qpKB1p2/1p2P1p1/2pk4/8/2BP1N2/4r1P1/3N4 w - - 0 0

Code: Select all

1. Be5 Na6+ 2. Kd8 Rxe5 3. Nc3+ Kd6 4. Nb5+ Kd5 5. Ke7 Rxe6+ 6. Bxe6+ fxe6 7. Nc3+ Kc6 8. Ne5+ Kc7 9. Nb5+ Kb8 10. Nd7+ Ka8 11. Kf6 e5 12. Kg5 e4 13.Kg4
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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: New EG puzzles to solve

Post by Nordlandia »

J. Timman | 1st commendation

[d]8/6p1/6P1/8/BkbP4/4K2n/P6P/8 w - - 0 0

Y. Bazlov | 3rd honourable mention | white wins

[d]4q2b/7K/4pPR1/4r3/3k4/4N1N1/2P2B2/8 w - - 0 0

O. Pervakov | hors concours | white wins

[d]7r/7q/2N4p/1p3b1k/1P3P2/P5p1/2QBK1PP/4N3 w - - 0 1
peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: New EG puzzles to solve

Post by peter »

Nordlandia wrote: Sun May 23, 2021 1:14 pm J. Timman | 1st commendation

[d]8/6p1/6P1/8/BkbP4/4K2n/P6P/8 w - - 0 0

Y. Bazlov | 3rd honourable mention | white wins

[d]4q2b/7K/4pPR1/4r3/3k4/4N1N1/2P2B2/8 w - - 0 0

O. Pervakov | hors concours | white wins

[d]7r/7q/2N4p/1p3b1k/1P3P2/P5p1/2QBK1PP/4N3 w - - 0 1
New CorChess with latest green SF- NNUE at 22 threads of 12x3GHz Xeon X5670 (SSE4.1 popcnt), 32G hash, 6men Syzygys.

1st one (Timman)

8/6p1/6P1/8/BkbP4/4K2n/P6P/8 w - - 0 1

Analysis by CorChess NNUE 1.4 220521:

Code: Select all

1.Ld7 Lf1 2.a3+ Kxa3 3.d5 Lg2 4.d6 
  +/=  (0.67)   Tiefe: 7/7   00:00:00  16kN
...
1.Ld7 Sg1 2.h4 Se2 3.h5 Sg3 4.a3+ Kxa3 5.Lg4 Kb4 6.Kf4 Sxh5+ 7.Lxh5 Kb5 8.Lf3 Kb6 9.Ke5 Kc7 10.Ld5 Ld3 11.Le4 Lc4 
  +/-  (1.11)   Tiefe: 18/26   00:00:05  8866kN, tb=105448
...
1.Ld7 Sg1 2.Le8 Sh3 3.Lf7 Kb5 4.a3 Lf1 5.Ld5 Ka5 6.Lf3 Kb5 7.Le4 Kc4 8.a4 Kb4 9.Lc6 Ka5 10.Ld7 Kb6 11.Lf5 Kc6 12.Le4+ Kb6 13.Lf3 Kc7 14.a5 Kd6 15.Le4 Kd7 16.Lf5+ Kc7 17.Lxh3 Lxh3 18.Kf4 Lf1 19.Ke5 Kd7 20.h4 Le2 21.d5 Ke7 22.h5 Kf8 
  +-  (2.33)   Tiefe: 30/48   00:00:43  207MN, tb=2975818
...
1.Ld7 Sg1 2.Le8 Sh3 3.Lf7 Kb5 4.a3 Lf1 5.Ld5 Ka5 6.Lf3 Kb5 7.Le4 Kc4 8.a4 Kb4 9.Lc6 Ka5 10.Ld7 Kb6 11.Lf5 Kc6 12.Le4+ Kb6 13.Lf3 Kc7 14.a5 Kd6 15.Le4 La6 16.Lf5 Lf1 17.a6 Lxa6 18.Lxh3 Ke7 19.Lf5 Lb5 20.Le4 Kf6 21.Kf3 Lc4 22.Kf4 
  +-  (3.71)   Tiefe: 34/56   00:01:33  898MN, tb=10647323
...
1.Ld7 Sg1 2.Le8 Sh3 3.Lf7 Kb5 4.a3 Lf1 5.Ld5 Ka5 6.Lf3 Kb5 7.Le4 Kc4 8.a4 Kb4 9.Lc6 Ka5 10.Ld7 Kb6 11.Lf5 Kc6 12.Le4+ Kb6 13.Lf3 Kc7 14.a5 Kd6 15.Le4 La6 16.Lf5 Sg5 17.Ld3 Lc8 18.a6 Lxa6 19.Lxa6 Se6 20.h4 Sc7 21.Lc4 Se8 22.Kf4 Sf6 23.Kf5 Kd7 24.Le6+ Kd6 
  +-  (5.50)   Tiefe: 36/52   00:02:38  2004MN, tb=19896663
...
1.Ld7 Sg1 2.Le8 Sh3 3.Lf7 Kb5 4.a3 Lf1 5.Ld5 Ka5 6.Lf3 Kb5 7.Le4 Kc4 8.a4 Kb4 9.Lc6 Ka5 10.Ld7 Kb6 11.Lf5 Kc6 12.Le4+ Kb6 13.Lf3 Kc7 14.a5 Kd6 15.Le4 Lb5 16.Lg2 Sg1 17.Lb7 Se2 18.a6 Lxa6 19.Lxa6 Sc3 20.Lc4 Sa4 21.h4 Sb6 22.Kd3 Ke7 23.h5 Kf6 24.Lf7 Sd7 25.d5 Ke7 26.Kc4 Sf6 27.h6 gxh6 28.Kd4 Kf8 29.Le6 Kg7 30.Lf5 Se8 
  +-  (6.78)   Tiefe: 37/66   00:04:57  4811MN, tb=36437506
Sorry for german abbr.

Second one (Bazlov)

4q2b/7K/4pPR1/4r3/3k4/4N1N1/2P2B2/8 w - - 0 1

Analysis by CorChess NNUE 1.4 220521:

Code: Select all

1.Nef5+ Kd5 2.c4+ Kxc4 3.Nd6+ Kd3 4.Nxe8 
  +-  (7.23)   Depth: 7/7   00:00:00  9kN
1.Nef5+ Kc3 2.Bd4+ Kxc2 3.Bxe5 Bxf6 4.Bxf6 exf5 5.Rg7 
  +/=  (0.50)   Depth: 8/9   00:00:00  51kN, tb=30
1.Ng4+ Kd5 2.c4+ Kd6 3.c5+ Kd5 4.Nxe5 Bxf6 
  +/-  (0.89)   Depth: 9/12   00:00:00  98kN, tb=375
...
1.Ng4+ Kd5 2.c4+ Kd6 3.Bd4 Ra5 4.Ne4+ Kc7 5.Ng5 Rf5 6.Nh6 Bxf6 7.Bxf6 Rc5 8.Rg8 Qc6 9.Kg7 Rxc4 10.Be5+ Kb6 11.Nhf7 Rc5 12.Kf6 Rxe5 13.Nxe5 Qc2 14.Ngf7 
  +/=  (0.54)   Depth: 19/30   00:00:13  8224kN, tb=78310
1.Ng4+ Kd5 2.c4+ Kd6 3.Bd4 Ra5 4.Ne4+ Kc7 5.Ng5 Rf5 6.Nh6 Bxf6 7.Bxf6 Rc5 8.Rg8 Qc6 9.Nhf7 Kb6 10.Kg6 Rxc4 11.Ne5 Qa4 12.Nxc4+ Qxc4 13.Nf7 
  +/=  (0.52)   Depth: 20/25   00:00:14  9156kN, tb=90641
...
1.Ng4+ Kd5 2.c4+ Kd6 3.Nxe5 Kxe5 4.Nh5 Bxf6 5.Nxf6 Qc6 6.Ng4+ Ke4 7.c5 Qb7+ 8.Rg7 Qb1 9.Rg5 Kf3+ 10.Kg7 Qa1+ 11.Kf7 Qa7+ 12.Kxe6 Qa2+ 13.Ke5 Qa7 14.Be3 Qe7+ 15.Kd5 Qd8+ 16.Ke6 Qe8+ 17.Kf6 
  +-  (2.18)   Depth: 22/35   00:00:20  18375kN, tb=206371
...
1.Ng4+ Kd5 2.c4+ Kd6 3.Nxe5 Kxe5 4.Nh5 Bxf6 5.Nxf6 Qc6 6.Ng4+ Ke4 7.c5 Qb7+ 8.Rg7 Qb1 9.Rf7 Kd5+ 10.Kh6 Qb8 11.Rd7+ Ke4 12.Kg5 e5 13.Kh4 Qh8+ 14.Kg3 Qg8 15.Be3 Qg6 16.Rd6 
  +-  (2.10)   Depth: 23/38   00:00:21  20463kN, tb=234400
...
  +-  (4.12)   Depth: 39/55   00:01:48  847MN, tb=14185688
1.Ng4+ Kd5 2.c4+ Kd6 3.Nxe5 Bxf6 4.Ne4+ Kxe5 5.Nxf6 Qf7+ 6.Kh6 Qf8+ 7.Kg5 Qd8 8.c5 Qd2+ 9.Kh5 Qd1+ 10.Ng4+ Kd5 11.Kh6 Qh1+ 12.Kg7 Qa1+ 13.Nf6+ Kc6 14.Rg4 e5 15.Rb4 Qa7+ 16.Kg6 Qa2 17.Be3 Kc7 18.Kf5 Qh2 19.Ke6 Qh3+ 20.Ke7 Kc8 21.Re4 Qh8 22.Ke6 Qh3+ 23.Kxe5 Kc7 24.Nd5+ Kd7 25.Kd4 Qh2 26.Re7+ Kd8 27.Ke4 Qh1+ 28.Ke5 Qh5+ 29.Kd6 Qg6+ 30.Re6 
  +-  (4.12)   Depth: 40/64   00:02:05  1076MN, tb=17984314
3rd on (Pervakov), Syzygy Probe Limit 0 (6men slowed down here too much at another one try):

7r/7q/2N4p/1p3b1k/1P3P2/P5p1/2QBK1PP/4N3 w - - 0 1

Analysis by CorChess NNUE 1.4 220521:

Code: Select all

1.Qd1 Bg4+ 2.Nf3 Bxf3+ 3.gxf3 gxh2 
  +/-  (1.00)   Depth: 7/7   00:00:12  21kN
1.Qc1 Bg4+ 2.Nf3 Qe4+ 3.Be3 gxh2 
  +/-  (1.59)   Depth: 8/10   00:00:12  55kN
...
1.Qc1 Re8+ 2.Ne5 Bg4+ 3.N1f3 Qe4+ 4.Be3 Rc8 5.Qh1 Bxf3+ 6.gxf3 Rc2+ 7.Kd1 Rc1+ 8.Bxc1 Qd4+ 9.Nd3 Qxd3+ 10.Ke1 Qc3+ 11.Kf1 Qxc1+ 12.Kg2 Qc2+ 13.Kxg3 Qg6+ 14.Kf2 Qc2+ 15.Ke3 Qc3+ 16.Ke4 Qc6+ 17.Ke5 Qc7+ 18.Kd5 Qc4+ 19.Kd6 Qxf4+ 20.Kd7 Qf7+ 21.Kc6 Qe6+ 22.Kxb5 Qd5+ 23.Kb6 Qd6+ 24.Ka5 Qd8+ 25.Ka4 Qd7+ 26.b5 Qd4+ 27.Ka5 Qa7+ 28.Kb4 Qd4+ 29.Ka5 
  =  (0.00)   Depth: 39/58   00:00:30  173MN
...
1.Qc1 Re8+ 2.Ne5 Bg4+ 3.N1f3 Qe4+ 4.Be3 Rc8 5.Qh1 Bxf3+ 6.gxf3 Rc2+ 7.Kf1 Rf2+ 8.Bxf2 Qe1+ 9.Kxe1 g2 10.Bg1 gxh1Q 11.Kf2 Kh4 12.Ng4 Kh3 13.Ne3 h5 14.f5 h4 15.a4 bxa4 16.f6 a3 17.f7 a2 18.f8Q Qxg1+ 19.Kxg1 a1Q+ 20.Kf2 Qg1+ 21.Ke2 Qxh2+ 22.Ke1 Qg1+ 23.Kd2 Qh2+ 24.Kc1 Qf4 25.Qf5+ Kg3 26.Qxf4+ Kxf4 27.Ng2+ Kxf3 28.Nxh4+ Ke4 29.b5 
  +-  (2.79)   Depth: 40/57   00:00:43  300MN
...
1.Qc1 Bg4+ 2.Nf3 Re8+ 3.Nce5 Qe4+ 4.Be3 Rc8 5.Qh1 Bxf3+ 6.gxf3 Rc2+ 7.Kf1 Rf2+ 8.Bxf2 Qe1+ 9.Kxe1 g2 10.Bg1 gxh1Q 11.Kf2 Kh4 12.Ng4 Kh3 13.Ne3 h5 14.f5 h4 15.a4 bxa4 16.f6 a3 17.f7 Qxg1+ 18.Kxg1 a2 19.f8Q a1Q+ 20.Kf2 Qg1+ 21.Ke2 Qxh2+ 22.Ke1 Qg1+ 23.Kd2 Qh2+ 24.Kc1 Qg1+ 25.Nd1 Kh2 26.Qf4+ Qg3 27.Qe3 Qc7+ 28.Nc3 Kg2 29.Qe2+ Kh3 30.Kb2 Qh2 31.Qxh2+ Kxh2 32.b5 
  +-  (4.15)   Depth: 41/66   00:01:23  718MN
Peter.