SF18 finally coming

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chessica
Posts: 1065
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: SF18 finally coming

Post by chessica »

Code: Select all

MEA
chessica
EPD-Datei: sts-1500-sf17.epd
Movetime: 100 ms | Hash: 256 MB | Threads: 1
Detailtabelle
Rank 	Engine 	Rating 	Top1 	MaxTop1 	Top1Rate 	Score 	MaxScore 	ScoreRate 	MoveTime 	Hash(MB) 	Threads 	Elo 	EloError 	EloCI95
1 	Esox-bmi2 	2824 	1163 	1500 	0.775 	13584 	15000 	0.906 	100 	256 	1 	3218 	3.27 	6.41
2 	Esox-avx2 	2824 	1162 	1500 	0.775 	13571 	15000 	0.905 	100 	256 	1 	3216 	3.27 	6.41
3 	SF-POLY 311225_avx512 	2824 	1160 	1500 	0.773 	13555 	15000 	0.904 	100 	256 	1 	3214 	3.27 	6.41
4 	Esox-sse41-popcnt 	2824 	1168 	1500 	0.779 	13536 	15000 	0.902 	100 	256 	1 	3210 	3.27 	6.41
5 	Leptir Boja TI-bmi2 	2824 	1160 	1500 	0.773 	13520 	15000 	0.901 	100 	256 	1 	3208 	3.27 	6.41
6 	Stockfish 231125 avx2 	2824 	1165 	1500 	0.777 	13517 	15000 	0.901 	100 	256 	1 	3208 	3.27 	6.41
7 	SF-POLY 311225_avx2 	2824 	1161 	1500 	0.774 	13516 	15000 	0.901 	100 	256 	1 	3208 	3.27 	6.41
8 	Esox II-avx2 	2824 	1150 	1500 	0.767 	13508 	15000 	0.901 	100 	256 	1 	3208 	3.27 	6.41
9 	Esox II-bmi2 	2824 	1149 	1500 	0.766 	13500 	15000 	0.900 	100 	256 	1 	3206 	3.27 	6.41
10 	SF-POLY 311225_bmi2 	2824 	1156 	1500 	0.771 	13497 	15000 	0.900 	100 	256 	1 	3206 	3.27 	6.41
11 	Stockfish 231125 bmi2 	2824 	1162 	1500 	0.775 	13491 	15000 	0.899 	100 	256 	1 	3204 	3.27 	6.41
12 	Leptir Boja TI-avx2 	2824 	1157 	1500 	0.771 	13483 	15000 	0.899 	100 	256 	1 	3204 	3.27 	6.41
13 	Leptir Boja TI-sse41-popcnt 	2824 	1155 	1500 	0.770 	13454 	15000 	0.897 	100 	256 	1 	3200 	3.27 	6.41
14 	stockfish_25120311_x64_avx2 	2824 	1152 	1500 	0.768 	13423 	15000 	0.895 	100 	256 	1 	3196 	3.27 	6.41
15 	SF-POLY 311225_sse41 	2824 	1142 	1500 	0.761 	13416 	15000 	0.894 	100 	256 	1 	3194 	3.27 	6.41
16 	Esox III-bmi2 	2824 	1148 	1500 	0.765 	13414 	15000 	0.894 	100 	256 	1 	3194 	3.27 	6.41
17 	stockfish-17.1-avx2 	2824 	1139 	1500 	0.759 	13405 	15000 	0.894 	100 	256 	1 	3194 	3.27 	6.41
18 	Stockfish 231125 popcnt 	2824 	1146 	1500 	0.764 	13396 	15000 	0.893 	100 	256 	1 	3193 	3.27 	6.41
19 	Revolution-4.10-261225 	2824 	1146 	1500 	0.764 	13395 	15000 	0.893 	100 	256 	1 	3193 	3.27 	6.41
20 	stockfish-18 	2824 	1144 	1500 	0.763 	13391 	15000 	0.893 	100 	256 	1 	3193 	3.27 	6.41
21 	Esox III-avx2 	2824 	1137 	1500 	0.758 	13368 	15000 	0.891 	100 	256 	1 	3189 	3.27 	6.41
22 	Esox II-sse41-popcnt 	2824 	1132 	1500 	0.755 	13353 	15000 	0.890 	100 	256 	1 	3187 	3.27 	6.41
23 	Stockfish 231125 64 	2824 	1132 	1500 	0.755 	13303 	15000 	0.887 	100 	256 	1 	3182 	3.27 	6.41
24 	sf-kernel_x64_bmi2 	2824 	1130 	1500 	0.753 	13290 	15000 	0.886 	100 	256 	1 	3180 	3.27 	6.41
25 	DON-BMI2 	2824 	1128 	1500 	0.752 	13284 	15000 	0.886 	100 	256 	1 	3180 	3.27 	6.41
26 	Leptir TI MPV PB-bmi2 	2824 	1147 	1500 	0.765 	13282 	15000 	0.885 	100 	256 	1 	3178 	3.27 	6.41
27 	Leptir TI MPV PB-avx2 	2824 	1146 	1500 	0.764 	13282 	15000 	0.885 	100 	256 	1 	3178 	3.27 	6.41
28 	sf-kernel_x64_avx2 	2824 	1131 	1500 	0.754 	13277 	15000 	0.885 	100 	256 	1 	3178 	3.27 	6.41
29 	DON-AVX2 	2824 	1131 	1500 	0.754 	13274 	15000 	0.885 	100 	256 	1 	3178 	3.27 	6.41
30 	DON-BMI2-COMP 	2824 	1129 	1500 	0.753 	13270 	15000 	0.885 	100 	256 	1 	3178 	3.27 	6.41
31 	DON-SSE41 SSSE3 SSE2 POPCNT 	2824 	1128 	1500 	0.752 	13246 	15000 	0.883 	100 	256 	1 	3175 	3.27 	6.41
32 	DON-SSSE3 SSE2 POPCNT 	2824 	1123 	1500 	0.749 	13242 	15000 	0.883 	100 	256 	1 	3175 	3.27 	6.41
33 	Leptir TI MPV PB-avx2 	2824 	1143 	1500 	0.762 	13238 	15000 	0.883 	100 	256 	1 	3175 	3.27 	6.41
34 	DON-SSE41 	2824 	1124 	1500 	0.749 	13232 	15000 	0.882 	100 	256 	1 	3173 	3.27 	6.41
35 	DON-BMI2 AVX2 SSE41 SSSE3 SSE2 POPCNT 	2824 	1121 	1500 	0.747 	13221 	15000 	0.881 	100 	256 	1 	3172 	3.27 	6.41
36 	DON-ssse3-sse2 	2824 	1114 	1500 	0.743 	13181 	15000 	0.879 	100 	256 	1 	3168 	3.27 	6.41
37 	Leptir TI MPV PB-sse41 	2824 	1138 	1500 	0.759 	13179 	15000 	0.879 	100 	256 	1 	3168 	3.27 	6.41
38 	DON-07-01-2026 	2824 	1110 	1500 	0.740 	13166 	15000 	0.878 	100 	256 	1 	3167 	3.27 	6.41
39 	reckless-0.9.0 	2824 	1101 	1500 	0.734 	13138 	15000 	0.876 	100 	256 	1 	3164 	3.27 	6.41
40 	DON-sse2 	2824 	1113 	1500 	0.742 	13083 	15000 	0.872 	100 	256 	1 	3157 	3.27 	6.41
41 	reckless_090_dev-162f_64_ja_avx512 	2824 	1100 	1500 	0.733 	13015 	15000 	0.868 	100 	256 	1 	3151 	3.27 	6.41
42 	Brainlearn25.2-x86-64 	2824 	1094 	1500 	0.729 	12973 	15000 	0.865 	100 	256 	1 	3147 	3.27 	6.41
43 	viridithas-17.0.0 	2824 	1086 	1500 	0.724 	12873 	15000 	0.858 	100 	256 	1 	3136 	3.27 	6.41
44 	Brainlearn25.2-x86-64-sse3-popcnt 	2824 	1082 	1500 	0.721 	12867 	15000 	0.858 	100 	256 	1 	3136 	3.27 	6.41
45 	Chess-System-Tal-2.00 	2824 	1089 	1500 	0.726 	12857 	15000 	0.857 	100 	256 	1 	3135 	3.27 	6.41
46 	PlentyChess-7.0.35 	2824 	1071 	1500 	0.714 	12807 	15000 	0.854 	100 	256 	1 	3131 	3.27 	6.41
47 	Quanticade-Windows-clang-x86-64-bmi2 	2824 	1061 	1500 	0.707 	12679 	15000 	0.845 	100 	256 	1 	3119 	3.27 	6.41
48 	Quanticade-Windows-clang-x86-64-avx512 	2824 	1061 	1500 	0.707 	12654 	15000 	0.844 	100 	256 	1 	3117 	3.27 	6.41
49 	viridithas-20.0 	2824 	1042 	1500 	0.695 	12553 	15000 	0.837 	100 	256 	1 	3108 	3.27 	6.41
50 	Brainlearn25.2-general-64 	2824 	1046 	1500 	0.697 	12493 	15000 	0.833 	100 	256 	1 	3103 	3.27 	6.41
51 	Brainlearn25.2-x86-32 	2824 	1034 	1500 	0.689 	12487 	15000 	0.832 	100 	256 	1 	3102 	3.27 	6.41
52 	Rebel-EAS-3.0-AVX2 	2824 	1041 	1500 	0.694 	12471 	15000 	0.831 	100 	256 	1 	3101 	3.27 	6.41
53 	PlentyChess_Alamat_7.0.41SE_BMI2 	2824 	1035 	1500 	0.690 	12456 	15000 	0.830 	100 	256 	1 	3099 	3.27 	6.41
54 	patricia_v3 	2824 	1025 	1500 	0.683 	12378 	15000 	0.825 	100 	256 	1 	3093 	3.27 	6.41
55 	jackal-2.0.0 	2824 	1039 	1500 	0.693 	12360 	15000 	0.824 	100 	256 	1 	3092 	3.27 	6.41
56 	Sun 15 MPV-avx2 	2824 	983 	1500 	0.655 	12227 	15000 	0.815 	100 	256 	1 	3082 	3.27 	6.41
57 	Sun 15-sse41-popcnt 	2824 	963 	1500 	0.642 	12151 	15000 	0.810 	100 	256 	1 	3076 	3.27 	6.41
58 	Sun 15-bmi2 	2824 	974 	1500 	0.649 	12130 	15000 	0.809 	100 	256 	1 	3075 	3.27 	6.41
59 	Brainlearn25.2-general-32 	2824 	999 	1500 	0.666 	12064 	15000 	0.804 	100 	256 	1 	3069 	3.27 	6.41
60 	Rebel-Extreme-1.1 	2824 	976 	1500 	0.651 	11793 	15000 	0.786 	100 	256 	1 	3050 	3.27 	6.41
61 	Patricia_5_xtremeEAS 	2824 	969 	1500 	0.646 	11765 	15000 	0.784 	100 	256 	1 	3048 	3.27 	6.41
62 	Chess-System-Tal-Extreme 	2824 	952 	1500 	0.635 	11704 	15000 	0.780 	100 	256 	1 	3044 	3.27 	6.41
63 	Vajolet2_3.0_bmi 	2824 	912 	1500 	0.608 	11133 	15000 	0.742 	100 	256 	1 	3008 	3.27 	6.41
64 	senpai_30_64_ja_avx 	2824 	878 	1500 	0.585 	10930 	15000 	0.729 	100 	256 	1 	2996 	3.27 	6.41
65 	senpai_30_64_ja_avx512 	2824 	876 	1500 	0.584 	10920 	15000 	0.728 	100 	256 	1 	2995 	3.27 	6.41
66 	senpai_30_64_ja_bmi2 	2824 	879 	1500 	0.586 	10918 	15000 	0.728 	100 	256 	1 	2995 	3.27 	6.41
67 	Vajolet2_3.0 	2824 	883 	1500 	0.589 	10906 	15000 	0.727 	100 	256 	1 	2994 	3.27 	6.41
68 	senpai_30_64_ja_sse4 	2824 	877 	1500 	0.585 	10902 	15000 	0.727 	100 	256 	1 	2994 	3.27 	6.41
69 	senpai_30_64_ja_avx2_zen2 	2824 	876 	1500 	0.584 	10897 	15000 	0.726 	100 	256 	1 	2993 	3.27 	6.41
70 	senpai_30_64_ja_sse3_nopop 	2824 	873 	1500 	0.582 	10865 	15000 	0.724 	100 	256 	1 	2992 	3.27 	6.41
71 	Sting-sf-bh-11 	2824 	846 	1500 	0.564 	10301 	15000 	0.687 	100 	256 	1 	2961 	3.27 	6.41
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tapio
Posts: 98
Joined: Thu May 30, 2024 10:33 am
Full name: Adsche Tönnsen

Re: SF18 finally coming

Post by tapio »

It's those days where we need archimedes the most 😊
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chessica
Posts: 1065
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: SF18 finally coming

Post by chessica »

Code: Select all

Rank	Engine	Rating	Top1	MaxTop1	Top1Rate	Score	MaxScore	ScoreRate
1	Leptir TI MPV PB-avx2	        2824	183	256	715	13865	19405	715	1000	256	1	2984	01.02.87	01.05.63	
41	Esox III-avx2	                2824	174	256	680	13115	19405	676	1000	256	1	2952	01.02.87	01.05.63	
65	stockfish-18	                2824	157	256	613	11675	19405	602	1000	256	1	2896	01.02.87	01.05.63
67	sf-kernel_x64_avx2	        2824	146	256	570	10940	19405	564	1000	256	1	2869	01.02.87	01.05.63
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Jouni
Posts: 3879
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: SF18 finally coming

Post by Jouni »

Mark Young test with 18 versions:

Code: Select all

1  Stockfish 17.1  318.0   77.94  228  180    0   44.12   55.88    100.00
2  Stockfish 16    317.0   77.70  233  168    7   41.18   58.82     97.08
3  Stockfish 18    316.5   77.57  227  179    2   43.87   56.13     99.13
4  Stockfish 15.1  312.5   76.59  221  183    4   44.85   55.15     98.22
5  Stockfish 14.1  299.5   73.41  200  199    9   48.77   51.23     95.69
6  Stockfish 13    290.5   71.20  192  197   19   48.28   51.72     91.00
7  Stockfish 12    287.0   70.34  189  196   23   48.04   51.96     89.15
8  Stockfish 11    225.0   55.15  120  210   78   51.47   48.53     60.61
9  Stockfish 10    220.0   53.92  115  210   83   51.47   48.53     58.08
10  Stockfish 9     204.0   50.00  101  206  101   50.49   49.51     50.00
11  Stockfish 8     200.0   49.02   93  214  101   52.45   47.55     47.69
12  Stockfish 7     195.0   47.79   89  212  107   51.96   48.04     45.64
13  Stockfish 6     188.0   46.08   80  216  112   52.94   47.06     41.67
14  Stockfish 5     115.0   28.19   41  148  219   36.27   63.73     15.77
15  Stockfish 4 DD  106.0   25.98   37  138  233   33.82   66.18     13.70
16  Stockfish 2.3.1   67.0   16.42   14  106  288   25.98   74.02      4.64
17  Stockfish 3       61.0   14.95   11  100  297   24.51   75.49      3.57
18  Stockfish 1.9.1   50.0   12.25    5   90  313   22.06   77.94      1.57
...

:D :lol:
Jouni
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Dann Corbit
Posts: 12870
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: SF18 finally coming

Post by Dann Corbit »

On the test set, I ran this position:

[d]r2nbrk1/1p2q2p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 w - -

which is the position after the key move has been taken, followed by this position:

[d]r3brk1/1p2qn1p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 b - -

which is the key position with the proposed best move of Nd8. I used three engines (two by Eduard Nemeth, and LC0, which is good at complicated opening positions and early mid-game. I used LC0 32.1 with network BT4.
Here are the results:

Code: Select all

r2nbrk1/1p2q2p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 w - - c0 'after Nd8'; c1 'Rems-M-091024-avx2'; acd 64/86; acs 3297; acn 64152782k; ce 13; bm Nc3; pv Nc3 Nc6 Nb5 Rb8 Rac1 b6 f5 exf5 Rxf5 Rxf5 Nxc6 Bxc6 Qxb8+ Rf8 Qc7 Qg5 Rb1 Rf2 Qg3 Qxg3+ Kxg3 Rf7 Rc1 bxc5 dxc5 Rf6 Nd4 Kf7 b4 axb4 a5 b3 Ra1 Ba8 Nxb3 Ke6 Ra4 Ke5 a6 Rc6 Kf2 g5 Ke3 d4+ Nxd4 Rxc5 Ne2 h5 g3 Kd6 a7 Kc6 Nd4+ Kb6 Ra3 Rd5 Ne6 Rf5 Ke2 g4 hxg4 hxg4;
r3brk1/1p2qn1p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 b - - c1 'Rems-M-091024-avx2'; acd 62/75; acs 3451; acn 70648426k; ce -52; bm Kh8; pv Kh8 Rad1 Qf6 Qe3 Bc6 Rc1 Kg8 Rb1 Qe7 Qg3 Qf6 h4 Kh8 Ra1 Rad8 Ng4 Qe7 Ng1 Ra8 Ne5 Nd8 Nh3 Be8 Nf2 Nc6 Rad1 Nb4 Nfg4 Rc8 Kg1 Qg7 Rd2 Rc7 Qe3 Qe7 g3 Rc8 Kh2 Qg7 Rg2 Rb8 Rb1 Qe7 Rh1 Kg7 Rb2 Kg8 Kg2 Rc8 Rf1 Qg7 Qd2 Ra8 Rc1 Rb8 Rbb1 Ra8 Rc3 Rb8 Rf1 Kh8 Rfc1 Kg8;
r2nbrk1/1p2q2p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 w - - c0 'after Nd8'; c1 'Sun-15-mpv-avx2'; acd 54/73; acs 3500; acn 65089717k; ce 10; bm Kg1; pv Kg1 Nc6 Rf2 Rb8 Raf1 Qg7 Kh2 h6 Qc3 Kh7 Qe3 Rc8 Kg1 Rb8 Ng4 Rf5 Kh2 Rf8 Rc1 Rf5 Rd1 Rf8 Kh1 Rc8 Rc1 Rc7 Rcf1 Rc8 Kg1 Rb8 Ne5 Qe7 Rc1 Qg7 Qd2 Qe7 Rd1 Qg7 Qc3 Qe7 Rff1 Ra8 Rb1 Rf5 Kh2 Qg7 Rfc1 Qc7;
r3brk1/1p2qn1p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 b - - c1 'Sun-15-mpv-avx2'; acd 49/87; acs 3363; acn 68824133k; ce -15; bm Nd8; pv Nd8 h4 Nc6 Rad1 Rf5 Kh3 Qg7 Qe3 Rb8 Rf2 Qe7 Rc1 h6 g3 Kh7 Kg2 Rd8 Rff1 Qg7 Rh1 Rb8 Rb1 Rf8 Rhf1 Rc8 Rf2 Rd8 Qd2 Rb8 Rff1 Kg8 Kh2 Ra8 Qe3 Rf5 Kg2 Rf8 Rf2 Rb8 Rc1 Kh7 Rff1 Kg8 Ng1 g5 fxg5;
r2nbrk1/1p2q2p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 w - - c0 'after Nd8'; c1 'LC0-32.1with BT4 net'; acd 18/74; acs 3589; acn 2884k; ce 84; bm Nc3; pv Nc3 Nc6 Rad1 Qg7 Nb5 h6 Qg4 Rf6 Kg1 Kh7 Nd6 Rb8 Qg3 Bd7 Qc3 Rff8 Rd2 Qe7 Rb2 Nb4 Rbf2 Nc6 h4 Rg8 g4 b6 g5 h5 Nxc6;
r3brk1/1p2qn1p/4p1p1/p1PpN3/P2PpP2/1P4QP/4N1PK/R4R2 b - - c1 'LC0-32.1with BT4 net'; acd 12/46; acs 3597; acn 2817k; ce -65; bm Kh8; pv Kh8 Rf2 Nh6 Qc3 Nf7 Raf1 Nd8 Qe3 Nc6 Nc3 Rb8 Nb5 Kg8 Kg1 b6 Rc1 Qd8 Rc3 Bd7 cxb6 Rxb6 Rc5 Ne7 Qc3 Bxb5 axb5 Nf5 Rc2 Rb7 Rc8 Qxc8 Qxc8 Rxc8;
I tried a number of other engines at ten minutes and most engines like Kh8. The best move was found by Sun and the centipawn score was a little closer to zero. I guess that both Kh8 and Nd8 draw.
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Damir
Posts: 2937
Joined: Mon Feb 11, 2008 3:53 pm
Location: Denmark
Full name: Damir Desevac

Re: SF18 finally coming

Post by Damir »

What is the winning move in this position?
[pgn][Event "?"]
[Site "?"]
[Date "2026.03.28"]
[Round "-"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR b KQkq d3 0 1"]

*
[/pgn]
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Damir
Posts: 2937
Joined: Mon Feb 11, 2008 3:53 pm
Location: Denmark
Full name: Damir Desevac

Re: SF18 finally coming

Post by Damir »

It is White to move.
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peter
Posts: 3570
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: SF18 finally coming

Post by peter »

With the correct position (White to move) it's a study from P.A. Lamford

https://www.yacpdb.org/#search/OFwvOFwv ... LzEvMS8w/1

that's in HHdb already given as "cooked", because there's a major dual transposing to main line, for those who want to find out on their own, I don't give it (author's solution nor transposing move) at once so far, engines don't have much difficulty with it anyhow neither, regards
Peter.
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Paloma
Posts: 1227
Joined: Thu Dec 25, 2008 9:07 pm
Full name: Herbert L

Re: SF18 finally coming

Post by Paloma »

What means cook PT can't find PT in docu-v2.pdf

name of the discoverer?
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peter
Posts: 3570
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: SF18 finally coming

Post by peter »

Paloma wrote: ↑Sun Mar 29, 2026 5:08 pm What means cook PT can't find PT in docu-v2.pdf

name of the discoverer?
Guess you mean the sideline in HHdb with 1.Rg2, don't you?
Made it a little longer till transposition to main line like this:

(1. Rg2 Kb6 2. Kd1 Kb5 3. Ke1 Kb6 {transp}), originally line ends in HHdbVII with (1.Rg2 <cook PT>)

[pgn][Event "no ty"]
[Site "; Chess American 3/1981"]
[Date "1981.??.??"]
[Round "?"]
[White "Lamford=P"]
[Black "(+1202.88c1b5) U1"]
[Result "1-0"]
[WhiteFideId "-1"]
[BlackFideId "-1"]
[SetUp "1"]
[FEN "8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - 0 1"]
[PlyCount "45"]
[GameId "2293062717457957"]
[EventDate "1981.??.??"]

{(EG#04402); source: Chess American 3/1981; U1: Tikka=P HHdbVII 3-2-2021} 1. Kd1 (1. Qa2 $2 bxa2 2. b3 a1=Q $1 (2... axb3 $2 3. Kb2 a1=Q+ 4. Kxa1) 3. bxa4+ Kxa4 4. Rg2 Qa2) (1. Rg2 $1 {<cook PT>} Kb6 2. Kd1 Kb5 3. Ke1 Kb6 {transp} ) 1... Kb6 2. Ke1 Kb5 3. Rg2 Kb6 4. Re2 Kb5 5. Kf2 Kb6 6. Re1 Kb5 7. Rg1 Kb6 8. Rg2 Kb5 9. Rc1 Kb6 10. Ke1 Kb5 11. Re2 Kb6 12. Kd1 Kb5 13. Re1 Kb6 14. Rc2 Kb5 15. Kc1 Kb6 16. Qa2 $1 bxa2 17. b4 $1 (17. b3 $2 a1=Q 18. Rb2 axb3) 17... a1=Q (17... axb3 18. Rxa2 bxa2 19. Kb2) (17... cxb3 18. Kb2 axb1=Q+ 19. Rxb1) 18. Rb2 Kb5 19. Rd1 Ka6 20. b5+ Kb6 21. Re1 (21. Rb4 $2 Qa2 22. Rb2 Qa1) 21... Ka7 22. b6+ Kb7 23. Rd1 1-0
[/pgn]
Peter.
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