Pawn endinge challenge: human vs engines.

[pepechuy]

Hi to all.

I am beginning a new challenge.
I will play pawn endings against engines, eight pawns vs seven paws.
I get the white pieces and one pawn advantage.
The opponents are: Berserk, Crafty, Komodo, Lc0 and Stockfish.
I will play with each one of the eight missing pawns against every engine (40 subchallenges).
I have to win at least once in each of the 40 subchallenges.

Time control: 10 minutes initial 10, plus 10 seconds increment.
Ponder on for the engines.
Other than that, all engines with default settings (unless there is reasonable suggestion to modify something).

One general comment about the challenge.
Since there are a lot of pawns, there is a real risk of blocking the position. Keeping the extra pawn, but without being able to invade with my king.
There is also the risk of some tactical oversight on my part.

I have just played the first game against Berserk, taking the a7 pawn.
Berserk did not really offer much resistance. After some moves, it just began to sacrifice one pawn after another, for no good reason.
I understand that the position is lost for it; but still I do not see the point of just giving up even more pawns.

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.13"]
[Round "*"]
[White "hm::Garcia Ruvalcaba, Jose de Jesus"]
[Black "Berserk 9"]
[Result "1-0"]
[Time "20:54:05"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/1ppppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. a4 f5 {+2.94/23 88844 79659673} 2. b4 g5 {+2.97/23 192735 167746546} 3. c4 e5
{+2.73/23 121105 115579748} 4. d3 d6 {+3.22/23 111179 103937509} 5. Kd2 c5
{+2.78/19 16461 16381644} 6. Kc3 Kd7 {+3.75/20 19656 40762615} 7. a5 Kd8
{+4.08/21 10 87912710} 8. b5 Kc7 {+6.58/20 90008 85739850} 9. Kd2 f4 {+6.08/21
10 34830816} 10. e3 d5 {+7.47/20 17246 28340281} 11. cxd5 h5 {+9.02/24 10
77190390} 12. e4 Kd7 {+15.39/19 39554 41704305} 13. Kc3 f3 {+18.61/17 10
11815485} 14. gxf3 g4 {+29.71/18 11818 18245058} 15. fxg4 c4 {+264.15/18 23509
24538117} 16. dxc4 hxg4 {+265.01/16 12474 10611702} 17. c5 g3 {+279.65/16 11531
11196094} 18. fxg3 Kc7 {M-11/20 6123 6822586} 19. h4 Kd8 {+12.27/16 6168
6870100} 20. h5 Kd7 {M-11/20 7727 8608018} 21. h6 Ke7 {M-7/31 2626 3015241} 22.
h7 Ke8 {M-6/36 259 2901165} 23. h8=Q+ Kf7 {M-5/49 74 4085465} 24. Qh6 Kg8
{M-5/56 7703 8842979} 25. a6 bxa6 {M-4/95 12709 15010114} 26. bxa6 Kf7 {M-3/97
10 9015} 27. a7 Ke7 {M-2/127 10 2387155} 28. a8=Q Kd7 {M-1/127 17874 21369408}
29. Qh7# 1-0
[/pgn]

The next game is against Crafty, taking the b7 pawn.

Greetings.

[Frank Quisinsky]

Hi,

that is interesting!
GM Joel Benjamin wrote an interesting book about it.

Liquidation on the Chess Board - Mastering the Transition Into the Pawn Endgame
978-90-5691-825-5

In my humble opinion one of the most interesting chess books I ever read!
So I try to play some of the position also vs. different engines!

I will follow, thank you and good luck!

Best
Frank

[Chessqueen]

Hi to all.

I am beginning a new challenge.
I will play pawn endings against engines, eight pawns vs seven paws.
I get the white pieces and one pawn advantage.
The opponents are: Berserk, Crafty, Komodo, Lc0 and Stockfish.
I will play with each one of the eight missing pawns against every engine (40 subchallenges).
I have to win at least once in each of the 40 subchallenges.

Time control: 10 minutes initial 10, plus 10 seconds increment.
Ponder on for the engines.
Other than that, all engines with default settings (unless there is reasonable suggestion to modify something).

One general comment about the challenge.
Since there are a lot of pawns, there is a real risk of blocking the position. Keeping the extra pawn, but without being able to invade with my king.
There is also the risk of some tactical oversight on my part.

I have just played the first game against Berserk, taking the a7 pawn.
Berserk did not really offer much resistance. After some moves, it just began to sacrifice one pawn after another, for no good reason.
I understand that the position is lost for it; but still I do not see the point of just giving up even more pawns.

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.13"]
[Round "*"]
[White "hm::Garcia Ruvalcaba, Jose de Jesus"]
[Black "Berserk 9"]
[Result "1-0"]
[Time "20:54:05"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/1ppppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. a4 f5 {+2.94/23 88844 79659673} 2. b4 g5 {+2.97/23 192735 167746546} 3. c4 e5
{+2.73/23 121105 115579748} 4. d3 d6 {+3.22/23 111179 103937509} 5. Kd2 c5
{+2.78/19 16461 16381644} 6. Kc3 Kd7 {+3.75/20 19656 40762615} 7. a5 Kd8
{+4.08/21 10 87912710} 8. b5 Kc7 {+6.58/20 90008 85739850} 9. Kd2 f4 {+6.08/21
10 34830816} 10. e3 d5 {+7.47/20 17246 28340281} 11. cxd5 h5 {+9.02/24 10
77190390} 12. e4 Kd7 {+15.39/19 39554 41704305} 13. Kc3 f3 {+18.61/17 10
11815485} 14. gxf3 g4 {+29.71/18 11818 18245058} 15. fxg4 c4 {+264.15/18 23509
24538117} 16. dxc4 hxg4 {+265.01/16 12474 10611702} 17. c5 g3 {+279.65/16 11531
11196094} 18. fxg3 Kc7 {M-11/20 6123 6822586} 19. h4 Kd8 {+12.27/16 6168
6870100} 20. h5 Kd7 {M-11/20 7727 8608018} 21. h6 Ke7 {M-7/31 2626 3015241} 22.
h7 Ke8 {M-6/36 259 2901165} 23. h8=Q+ Kf7 {M-5/49 74 4085465} 24. Qh6 Kg8
{M-5/56 7703 8842979} 25. a6 bxa6 {M-4/95 12709 15010114} 26. bxa6 Kf7 {M-3/97
10 9015} 27. a7 Ke7 {M-2/127 10 2387155} 28. a8=Q Kd7 {M-1/127 17874 21369408}
29. Qh7# 1-0
[/pgn]

The next game is against Crafty, taking the b7 pawn.

Greetings.

Also try this interesting pawn odds position against Berserk 9
[fen]r1b1kb1r/pppppppp/8/8/8/8/P1PPPP1P/RN2K1NR w KQkq - 0 1 [/fen]

[Chessqueen]

Hi to all.

I am beginning a new challenge.
I will play pawn endings against engines, eight pawns vs seven paws.
I get the white pieces and one pawn advantage.
The opponents are: Berserk, Crafty, Komodo, Lc0 and Stockfish.
I will play with each one of the eight missing pawns against every engine (40 subchallenges).
I have to win at least once in each of the 40 subchallenges.

Time control: 10 minutes initial 10, plus 10 seconds increment.
Ponder on for the engines.
Other than that, all engines with default settings (unless there is reasonable suggestion to modify something).

One general comment about the challenge.
Since there are a lot of pawns, there is a real risk of blocking the position. Keeping the extra pawn, but without being able to invade with my king.
There is also the risk of some tactical oversight on my part.

I have just played the first game against Berserk, taking the a7 pawn.
Berserk did not really offer much resistance. After some moves, it just began to sacrifice one pawn after another, for no good reason.
I understand that the position is lost for it; but still I do not see the point of just giving up even more pawns.

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.13"]
[Round "*"]
[White "hm::Garcia Ruvalcaba, Jose de Jesus"]
[Black "Berserk 9"]
[Result "1-0"]
[Time "20:54:05"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/1ppppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. a4 f5 {+2.94/23 88844 79659673} 2. b4 g5 {+2.97/23 192735 167746546} 3. c4 e5
{+2.73/23 121105 115579748} 4. d3 d6 {+3.22/23 111179 103937509} 5. Kd2 c5
{+2.78/19 16461 16381644} 6. Kc3 Kd7 {+3.75/20 19656 40762615} 7. a5 Kd8
{+4.08/21 10 87912710} 8. b5 Kc7 {+6.58/20 90008 85739850} 9. Kd2 f4 {+6.08/21
10 34830816} 10. e3 d5 {+7.47/20 17246 28340281} 11. cxd5 h5 {+9.02/24 10
77190390} 12. e4 Kd7 {+15.39/19 39554 41704305} 13. Kc3 f3 {+18.61/17 10
11815485} 14. gxf3 g4 {+29.71/18 11818 18245058} 15. fxg4 c4 {+264.15/18 23509
24538117} 16. dxc4 hxg4 {+265.01/16 12474 10611702} 17. c5 g3 {+279.65/16 11531
11196094} 18. fxg3 Kc7 {M-11/20 6123 6822586} 19. h4 Kd8 {+12.27/16 6168
6870100} 20. h5 Kd7 {M-11/20 7727 8608018} 21. h6 Ke7 {M-7/31 2626 3015241} 22.
h7 Ke8 {M-6/36 259 2901165} 23. h8=Q+ Kf7 {M-5/49 74 4085465} 24. Qh6 Kg8
{M-5/56 7703 8842979} 25. a6 bxa6 {M-4/95 12709 15010114} 26. bxa6 Kf7 {M-3/97
10 9015} 27. a7 Ke7 {M-2/127 10 2387155} 28. a8=Q Kd7 {M-1/127 17874 21369408}
29. Qh7# 1-0
[/pgn]

The next game is against Crafty, taking the b7 pawn.

Greetings.

Also try this interesting pawn odds position against Berserk 9
[fen]r1b1kb1r/pppppppp/8/8/8/8/P1PPPP1P/RN2K1NR w KQkq - 0 1 [/fen]

Without the boths Queens and removing the two Bishops plus two pawns Odds a Patzer like me can challenge Berserk -9, But NOT Dragon 3.1 or Stockfish

[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2022.09.14"]
[Round "?"]
[White "Berserk-9-x64-avx2-pext"]
[Black "Chequeen"]
[Result "0-1"]
[Time "12:59:09"]
[TimeControl "300+5"]
[SetUp "1"]
[FEN "r1b1kb1r/pppppppp/8/8/8/8/P1PPPP1P/RN2K1NR w KQkq - 0 1"]
[Termination "normal"]
[PlyCount "62"]
[WhiteType "program"]
[BlackType "human"]


1. Nc3 c6 2. f4 g6 3. a4 Bg7 4. Nf3 O-O 5. a5 d5 6. Kf2 Bf5 7. Rhb1 Rfb8 8.
Ra2 d4 9. Nd1 c5 10. Rb5 Be6 11. Rab2 d3 12. c3 dxe2 13. Ne3 Bh6 14. Ng5
Bc8 15. Nd5 e5 16. Rxc5 exf4 17. Nf6+ Kh8 18. h4 Bxg5 19. hxg5 b6 20. Rc7
f3 21. Rb4 Kg7 22. Ne8+ Kf8 23. Nd6 Be6 24. Rf4 bxa5 25. Nxf7 a4 26. Nd6+
Kg8 27. Ne4 Rf8 28. Nf6+ Rxf6 29. gxf6 a3 30. Rg7+ Kf8 31. Ra4 Re8 32. Rxa3
Bf7 33. Ra1 h5 34. c4 Re6 35. Rh7 Rxf6 36. Rg1 Kg8 37. Rxh5 e1=Q+ 38. Rxe1
gxh5 39. d3 h4 40. Rg1+ Kf8 41. Rh1 Bg6 42. d4 Rf4 43. Ke3 Re4+ 44. Kxf3
Rxd4 45. Ra1 Be4+ 46. Kf4 Rxc4 47. Rxa7 h3 48. Kg3 Bf5 49. Ra5 Rc3+ 50. Kf4
Be6 51. Rh5 Kf7 52. Ke4 Kg6 53. Ra5 Rc1 54. Ra3 h2 55. Rg3+ Kh7 56. Rd3
h1=Q+ 57. Ke5 Re1+ 58. Kd6 Qe4 59. Rb3 {White resigns} 0-1[/pgn]

[pepechuy]

Hi.

Now, the first game against Crafty, taking the b7 pawn.

Before getting into the game, I want to mention that I switched back to BanksiaGUI 0.54 (after playing the first game against Berserk within BanksiaGUI 0.55). I could not get Crafty to work with the newer version, it kept resigning in the first move, and after several tries the GUI just crashed, I will continue the challenge with version 0.54.

Oh, I still can not prevent Crafty from resigning. I set resign = 327.65, and it resigned two moves before mate.
The game itself was not very difficult, I just had to be careful and play a few precise moves.
I like specially my move 10. g4; it looks ugly, but it was the way I found to avoid closing the kingside.

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.16"]
[Round "*"]
[White "hm::García Ruvalcaba, José de Jesús"]
[Black "Crafty-25.3"]
[Result "1-0"]
[BlackElo "2600"]
[Time "22:48:32"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/p1pppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "resign"]

1. b4 d5 {-1.35/22 86439 232674255} 2. c3 e5 {-1.21/24 45645 130031310} 3. d3
Kd7 {-1.24/22 42939 144075014} 4. c4 Ke6 {-1.18/22 69615 201517018} 5. Kd2 d4
{-1.28/21 44571 108898418} 6. e3 f6 {-1.52/22 62519 213107351} 7. exd4 exd4
{-2.72/23 23084 70593538} 8. Ke2 f5 {-2.12/25 48057 152215288} 9. Kf3 g5
{-2.84/26 46488 155430888} 10. g4 Kf6 {-4.10/27 53857 195545444} 11. a4 fxg4+
{-5.02/27 55280 186733130} 12. Kxg4 Kg6 {-5.04/28 18766 68089793} 13. h3 h5+
{-5.61/27 22985 62155272} 14. Kf3 Kf5 {-5.84/28 15002 56814764} 15. a5 Ke6
{-6.11/27 21915 67258323} 16. Ke4 Kd7 {-7.17/27 32749 92378164} 17. Kf5 g4
{-13.09/28 13244 42249130} 18. hxg4 h4 {-13.17/27 23094 75680774} 19. Kf4 Ke6
{-14.93/25 21558 68599985} 20. g5 h3 {-12.97/26 21277 17779867} 21. Kg3 Ke5
{-15.93/23 14737 64447210} 22. f4+ Kd6 {-21.46/23 12600 58347531} 23. Kxh3 Ke6
{-21.52/22 11981 41734695} 24. Kg4 Kf7 {-29.81/22 10012 46946779} 25. f5 c6
{-327.45/21 11051 41404552} 26. b5 cxb5 {-327.45/21 6802 32661946} 27. cxb5 Ke8
{-327.47/22 7053 30698143} 28. b6 axb6 {-327.49/24 7008 32547594} 29. axb6 Kd7
{-327.49/25 7113 29325668} 30. g6 Kc8 {-327.51/31 7036 21477900} 31. g7 Kb7
{-327.53/38 7121 22856484} 32. g8=Q Kxb6 {-327.55/52 7266 22761142} 33. Qc4 Kb7
{-327.57/75 7330 23957666} 34. f6 Kb6 {-327.59/124 1475 4871095} 35. f7 Kb7
{-327.61/124 10 442} 36. f8=Q 1-0
[/pgn]

The next is against Komodo, taking the c7 pawn.

Greetings.

[pepechuy]

Hi,

that is interesting!
GM Joel Benjamin wrote an interesting book about it.

Liquidation on the Chess Board - Mastering the Transition Into the Pawn Endgame
978-90-5691-825-5

In my humble opinion one of the most interesting chess books I ever read!
So I try to play some of the position also vs. different engines!

I will follow, thank you and good luck!

Best
Frank

Hi.

Benjamin's book is about transition into a pawn ending (from other endings), not really about pawn endings in particular.
For example: from rook ending into pawn ending, or from bishop vs knight ending into pawn ending, usw.
I have read only an excerpt, not the whole book.
What I liked: he uses several examples from games he lost (I guess they left a painful impression on him).

Greetings.

[pepechuy]

Hi.

Now, the game against Komodo, taking the c7 pawn.
A win for me... quite a difficult one, at some points I was not sure the position was still won for me.
Also, I ran low on time, less than two minutes... at the end I had over three minutes, but that was because the last moves were too easy.

10. g4? would have been a very bad move: black replies g5 and now it is impossible to break thru the kingside with my king. Whether the position is still won, I do not know; but it certainly becomes very difficult. In the next few moves g4? is still bad for me, for the same reasons. For example, 11. g4? g5, and black just leaves a pawn on g5, regardless of what I play.
I considered 13. e5, but I did not like 13... g5, and Black gets a passed pawn on d5.
At first, I did not understand 14... Kb6 and was about to play 15. ed5; fortunately I saw that Black simply replies 15... f5, and the kingside is almost closed.
After 19. Ke3, I really did not know if the position was still won for me. But I saw that even after 19... Kc4 (a seemingly dangerous move from Black), there were very little chances of losing: I did not see any variation where Komodo promoted before me. Here I was low on time.
After 19... g4 I felt relieved, I saw that I would get an outside passed pawn.
I was not sure about 23. Ke4, I also considered 23. g3. In hindsight, I think both win; but during the game these decisions are not easy!

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.25"]
[Round "*"]
[White "hm::García Ruvalcaba, José de Jesús"]
[Black "Komodo 13.02 64-bit"]
[Result "1-0"]
[BlackElo "3500"]
[Time "20:39:05"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/pp1ppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. c4 e6 {+1.94/23 31295 33093401} 2. d4 d5 {+1.81/24 28550 32252301} 3. c5 Kd7
{+1.91/24 25475 26723114} 4. Kd2 Kc6 {+2.39/25 61285 92985042} 5. a4 b5
{+2.52/24 24022 42295381} 6. cxb6 Kxb6 {+3.18/26 156873 188298823} 7. b4 Kb7
{+3.20/23 20050 38301818} 8. Ke3 g6 {+3.05/24 61756 66087350} 9. Kf4 f6
{+4.08/22 25021 22408573} 10. h4 h6 {+4.42/24 44494 46774109} 11. f3 Kb6
{+5.91/28 10 121233833} 12. e4 Kc6 {+6.18/25 1819 31044489} 13. h5 g5+ {+5.77/25
30721 41753507} 14. Kg4 Kb6 {+6.20/27 23975 29557948} 15. f4 dxe4 {+8.11/33 10
219759408} 16. fxg5 fxg5 {+7.95/31 46185 72662607} 17. Kg3 Kc6 {+9.49/32 22989
49535516} 18. Kf2 Kd5 {+9.63/32 22799 56537017} 19. Ke3 g4 {+10.09/29 24544
44583620} 20. b5 e5 {+14.84/31 19186 162815599} 21. dxe5 Kxe5 {+14.05/28 10
7231914} 22. a5 Kd6 {+21.98/32 10 105975720} 23. Kxe4 g3 {M-34/23 2268 3676275}
24. Kf4 Kc5 {M-39/27 1697 2766669} 25. b6 axb6 {M-37/27 10 4237373} 26. axb6
Kxb6 {M-34/29 10 3121382} 27. Kxg3 Kc5 {M-26/31 10 6428580} 28. Kf4 Kd5 {M-18/29
612 4866036} 29. Kf5 Kd4 {M-15/29 1489 3044581} 30. Kg6 Ke5 {M-14/29 1956
3136481} 31. Kxh6 Kf5 {M-13/31 10 7978865} 32. Kg7 Kg5 {M-12/31 10 7592062} 33.
h6 Kf5 {M-11/29 1021 6514824} 34. h7 Ke4 {M-10/29 2163 7704395} 35. h8=Q Kd3
{M-9/27 2131 3484323} 36. Qe8 Kd4 {M-9/25 2263 3261601} 37. Kf6 Kc3 {M-7/30 2331
5383094} 38. Qe4 Kb3 {M-7/31 2172 4398359} 39. Qd4 Kc2 {M-6/45 2325 5984102} 40.
Ke5 Kb3 {M-5/92 10 6927545} 41. Ke4 Ka3 {M-4/99 117 256983} 42. Qb6 Ka2 {M-3/99
64 54817} 43. Kd3 Ka3 {M-2/99 10 4140} 44. Kc3 Ka4 {M-1/99 10 298} 45. Qa6# 1-0
[/pgn]

Next game is against Lc0, taking the d7 pawn.

Greetings.

[Chessqueen]

Hi.

Now, the game against Komodo, taking the c7 pawn.
A win for me... quite a difficult one, at some points I was not sure the position was still won for me.
Also, I ran low on time, less than two minutes... at the end I had over three minutes, but that was because the last moves were too easy.

10. g4? would have been a very bad move: black replies g5 and now it is impossible to break thru the kingside with my king. Whether the position is still won, I do not know; but it certainly becomes very difficult. In the next few moves g4? is still bad for me, for the same reasons. For example, 11. g4? g5, and black just leaves a pawn on g5, regardless of what I play.
I considered 13. e5, but I did not like 13... g5, and Black gets a passed pawn on d5.
At first, I did not understand 14... Kb6 and was about to play 15. ed5; fortunately I saw that Black simply replies 15... f5, and the kingside is almost closed.
After 19. Ke3, I really did not know if the position was still won for me. But I saw that even after 19... Kc4 (a seemingly dangerous move from Black), there were very little chances of losing: I did not see any variation where Komodo promoted before me. Here I was low on time.
After 19... g4 I felt relieved, I saw that I would get an outside passed pawn.
I was not sure about 23. Ke4, I also considered 23. g3. In hindsight, I think both win; but during the game these decisions are not easy!

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.09.25"]
[Round "*"]
[White "hm::García Ruvalcaba, José de Jesús"]
[Black "Komodo 13.02 64-bit"]
[Result "1-0"]
[BlackElo "3500"]
[Time "20:39:05"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/pp1ppppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. c4 e6 {+1.94/23 31295 33093401} 2. d4 d5 {+1.81/24 28550 32252301} 3. c5 Kd7
{+1.91/24 25475 26723114} 4. Kd2 Kc6 {+2.39/25 61285 92985042} 5. a4 b5
{+2.52/24 24022 42295381} 6. cxb6 Kxb6 {+3.18/26 156873 188298823} 7. b4 Kb7
{+3.20/23 20050 38301818} 8. Ke3 g6 {+3.05/24 61756 66087350} 9. Kf4 f6
{+4.08/22 25021 22408573} 10. h4 h6 {+4.42/24 44494 46774109} 11. f3 Kb6
{+5.91/28 10 121233833} 12. e4 Kc6 {+6.18/25 1819 31044489} 13. h5 g5+ {+5.77/25
30721 41753507} 14. Kg4 Kb6 {+6.20/27 23975 29557948} 15. f4 dxe4 {+8.11/33 10
219759408} 16. fxg5 fxg5 {+7.95/31 46185 72662607} 17. Kg3 Kc6 {+9.49/32 22989
49535516} 18. Kf2 Kd5 {+9.63/32 22799 56537017} 19. Ke3 g4 {+10.09/29 24544
44583620} 20. b5 e5 {+14.84/31 19186 162815599} 21. dxe5 Kxe5 {+14.05/28 10
7231914} 22. a5 Kd6 {+21.98/32 10 105975720} 23. Kxe4 g3 {M-34/23 2268 3676275}
24. Kf4 Kc5 {M-39/27 1697 2766669} 25. b6 axb6 {M-37/27 10 4237373} 26. axb6
Kxb6 {M-34/29 10 3121382} 27. Kxg3 Kc5 {M-26/31 10 6428580} 28. Kf4 Kd5 {M-18/29
612 4866036} 29. Kf5 Kd4 {M-15/29 1489 3044581} 30. Kg6 Ke5 {M-14/29 1956
3136481} 31. Kxh6 Kf5 {M-13/31 10 7978865} 32. Kg7 Kg5 {M-12/31 10 7592062} 33.
h6 Kf5 {M-11/29 1021 6514824} 34. h7 Ke4 {M-10/29 2163 7704395} 35. h8=Q Kd3
{M-9/27 2131 3484323} 36. Qe8 Kd4 {M-9/25 2263 3261601} 37. Kf6 Kc3 {M-7/30 2331
5383094} 38. Qe4 Kb3 {M-7/31 2172 4398359} 39. Qd4 Kc2 {M-6/45 2325 5984102} 40.
Ke5 Kb3 {M-5/92 10 6927545} 41. Ke4 Ka3 {M-4/99 117 256983} 42. Qb6 Ka2 {M-3/99
64 54817} 43. Kd3 Ka3 {M-2/99 10 4140} 44. Kc3 Ka4 {M-1/99 10 298} 45. Qa6# 1-0
[/pgn]

Next game is against Lc0, taking the d7 pawn.

Greetings.

You should also try against this position with 2 pawns odds, but you do NOT have to post it if you lose, but I guarantee you that it would be challenging against any of the top 4 engines
[fen]r1b1kb1r/pppppppp/8/8/8/8/P1PPPP1P/RN2K1NR w KQkq - 0 1 [/fen]

[pepechuy]

You should also try against this position with 2 pawns odds, but you do NOT have to post it if you lose, but I guarantee you that it would be challenging against any of the top 4 engines
[fen]r1b1kb1r/pppppppp/8/8/8/8/P1PPPP1P/RN2K1NR w KQkq - 0 1 [/fen]

Hi.

Well, first I have to finish this challenge.
And then the Queen vs Rook odds challenge (suggested by you), and the chess960 challenge.

Greetings.

[pepechuy]

Hi to all.

Now, the game against Lc0, taking the d7 pawn.
A win for me.

Actually, I think Lc0's defensive set up was very good: leaving each side with three pawn islands, and my pawn majority in the central one. This way, it keeps the option of attacking either of my other two pawn groups: my extra pawn is not "outside".
However, I think 16... h4 was just a bad move (at least from a practical perspective); it deprives itself of the possibility of going after my h-pawn. I think 16... b6 was better. After 16... h4, the win was straightforward.

[pgn]
[Event "banksia game"]
[Site "*"]
[Date "2022.10.08"]
[Round "*"]
[White "hm::Garcia Ruvalcaba, Jose de Jeses"]
[Black "Lc0 v0.27.0"]
[Result "1-0"]
[BlackElo "3500"]
[Time "20:22:43"]
[TimeControl "600+10"]
[SetUp "1"]
[FEN "4k3/ppp1pppp/8/8/8/8/PPPPPPPP/4K3 w - - 0 1"]
[Termination "mate"]

1. d4 Kd7 {+4.52/4 57979 3910} 2. Kd2 Kd6 {+4.92/4 24948 2368} 3. Kd3 e5
{+6.20/6 4285 11713} 4. dxe5+ Kxe5 {+4.61/5 46625 2981} 5. e4 Kf4 {+2.38/6 20244
1770} 6. f3 g5 {+2.77/6 35198 2337} 7. Ke2 g4 {+3.28/7 3859 1591} 8. Kf2 gxf3
{+1.05/7 21509 1388} 9. gxf3 a5 {+0.87/8 8444 2431} 10. a4 c6 {+0.55/11 13902
4844} 11. c4 c5 {+2.51/13 116642 38659} 12. b3 h6 {+2.26/11 28302 8856} 13. Ke2
f6 {+2.49/14 10256 5949} 14. Kf2 h5 {+2.58/9 231 2712} 15. Ke2 Kg5 {+2.76/10
8082 2851} 16. Ke3 h4 {+4.64/10 16052 5790} 17. h3 f5 {+6.67/11 2973 4845} 18.
exf5 Kxf5 {+10.96/1 14 6173} 19. f4 Kf6 {+11.07/1 10 6268} 20. Ke4 Ke6 {+14.06/8
1051 3544} 21. f5+ Kf6 {+12.27/8 22300 6722} 22. Kf4 Kf7 {+14.04/7 27153 9549}
23. Kg5 Kg7 {+19.45/7 44246 12741} 24. Kxh4 Kf6 {+24.66/6 16177 6184} 25. Kg4
Ke7 {+24.90/6 20987 5570} 26. h4 Kf7 {+25.72/6 25694 5098} 27. h5 Kg7 {+20.36/6
20970 4110} 28. Kg5 Kf7 {+25.06/6 13554 3960} 29. h6 b6 {+30.26/6 25768 3124}
30. f6 Ke6 {+46.68/6 13164 2586} 31. h7 Ke5 {+82.21/5 15167 1943} 32. h8=Q Kd4
{+107.41/5 19188 2335} 33. Qh3 b5 {+50.79/5 14604 1204} 34. cxb5 c4 {+84.14/5
20790 1692} 35. bxc4 Kc5 {+51.04/5 22032 1590} 36. f7 Kb4 {+11.03/5 10349 980}
37. f8=Q+ Kxa4 {+0.19/3 121 46} 38. Qha3# 1-0
[/pgn]

The next game is against Stockfish, taking the e7 pawn.
When I get the chance.

Greetings.