Author: Dann Corbit
Date: 19:21:35 11/27/01
Go up one level in this thread
On November 27, 2001 at 21:49:27, Dann Corbit wrote:
>On November 27, 2001 at 20:48:31, ALI MIRAFZALI wrote:
>[snip]
>>The games on the cap.connx website are loses due to time by programs?
>
>Those games are very high speed games, which I autoplayed just to ensure that
>the programs would act in a stable manner when they faced each other at longer
>time control. Sometimes, an absurd move will really hit your funny bone if you
>play through them.
>
>Take a look at this beauty, and notice that the time control is G/2Hrs on a 900
>MHz machine {clearly no time pressure at this point...}:
>
>[Event "Computer chess game"]
>[Site "DANNFAST"]
>[Date "2001.10.06"]
>[Round "1"]
>[White "Aldebaran-070"]
>[Black "Tamerlane-01"]
>[Result "1-0"]
>[ECO "B02q"]
>[Variation "Alekhine: Two Pawns Attack, 5.Bc4"]
>[TimeControl "7200"]
>
>1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 c6 6.Qf3 Na6 7.Bxa6 bxa6 8.Nc3
>f6 9.Nxd5 cxd5 10.Qxd5 Rb8 11.exf6
>{OK, we're down a pawn, is it time for hari-kari?
>[D]1rbqkb1r/p2pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR b KQk -
>}
>
>...gxf6 ????
>
>12.Qh5# 1-0
>{
>Apparently so!
>New nomenclature:
>4 question marks are for when the worst possible move is made.
>Yes. This really did happen.
>}
This is the clear and only choice for what black should have done:
[D]1rbqkb1r/p2p2pp/p4p2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 10; acn 4284269;
acs 10; ce 98; pv Qh5+ g6 Qe2+ Kf7 Nf3 Qa5 O-O Qxc5 d3 Qe7 Be3 d5;
A bit of analysis by Yace:
white ( 1): setboard 1rbqkb1r/p2pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR b KQk -
Stored 8 learned positions into hash table
black ( 1):
black ( 1): go
usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
13 0.020 -5.40 1t 1...Rxb2 2.Bxb2 gxf6 {-490}
17 0.020 -0.89 1t 1...gxf6 {-70}
37 0.020 -0.89 1. 1...gxf6 {-70}
68 0.021 -Mat01 2-- 1...gxf6 2.Qh5# {-70}
107 0.021 -Mat01 2t 1...gxf6 2.Qh5# {-70}
182 0.021 -Mat02 2t+ 1...exf6 2.Qh5+ g6 3.Qxh7 {-150}
267 0.022 -1.22 2t 1...exf6 2.d4 {-70}
502 0.023 -1.22 2. 1...exf6 2.d4 {-70}
1063 0.025 -1.06 3t 1...exf6 2.d4 Bb7 {-70}
1185 0.026 -1.06 3. 1...exf6 2.d4 Bb7 {-70}
3488 0.032 -0.92 4t 1...exf6 2.d4 Bb7 3.Qh5+ g6 {-70}
3901 0.034 -0.92 4. 1...exf6 2.d4 Bb7 3.Qh5+ g6 {-70}
12569 0.057 -0.90 5t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 {-70}
13723 0.060 -0.90 5. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 {-70}
53610 0.153 -0.75 6t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 {-70}
59777 0.169 -0.75 6. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 {-70}
130197 0.333 -0.86 7t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qe2+ Qe7 5.f3
Qxe2+ 6.Nxe2 Bd5 {-70}
144676 0.374 -0.86 7. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qe2+ Qe7 5.f3
Qxe2+ 6.Nxe2 Bd5 {-70}
407885 1.023 -0.83 8t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 d6 5.Bf4 Bd5
{-70}
484629 1.222 -0.83 8. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 d6 5.Bf4 Bd5
{-70}
1506562 3.991 -0.76 9t 1...exf6 2.Qh5+ g6 3.Qe2+ Qe7H 4.d4H Bb7H 5.f3H
Kf7H 6.Qe3H Qxe3+H 7.Ne2H {HT} {931}
1617280 4.260 -0.76 9. 1...exf6 2.Qh5+ g6 3.Qe2+ Qe7 4.d4 Bb7 5.f3 Kf7
6.Qe3 Qxe3+ 7.Ne2 {HT} {931}
5290952 14.123 -0.74 10t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 5.Qe2+
Qe7 6.f3 Qxe2+H 7.Nxe2H Kf7H {-70}
7044046 18.692 -0.74 10. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 5.Qe2+
Qe7 6.f3 Qxe2+ 7.Nxe2 Kf7 {-70}
13741710 36.182 -0.70 11t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 5.b3 f5
6.Qe2+ Qe7 7.f3 Bg7 {-70}
14679171 38.540 -0.70 11. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Bd5 5.b3 f5
6.Qe2+ Qe7 7.f3 Bg7 {-70}
39051548 1:43.9 -0.65 12t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Kf7 5.Bf4
Qa5+ 6.Bd2 Qa4 7.b3 Re8+H 8.Ne2H Qb5H {-70}
45546993 2:00.3 -0.65 12. 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qg4 Kf7 5.Bf4
Qa5+ 6.Bd2 Qa4 7.b3 Re8+ 8.Ne2 Qb5 {-70}
110874389 5:02.5 -0.67 13t 1...exf6 2.d4 Bb7 3.Qh5+ g6 4.Qh3 d6 5.Bf4 Bd5
6.b3 Qa5+ 7.Kf1H Bxb3H 8.Re1+H Be6H 9.Rxe6+H
Kf7H {HT} {-340}
This would have been merely a very bad blunder:
[D]1rb1kb1r/p1qpp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 9; acn 4276764;
acs 11; ce 261; pv f7+ Kd8 Nf3 Bb7 Qh5 e5 Qg5+ Kc8 c6 dxc6 Qf5+ Qd7 Qxd7+ Kxd7
Nxe5+;
These would have been simply enormous, absurd blunders:
[D]1rbqkb1r/p3p1pp/p2p1P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 8; acn 4433505;
acs 11; ce 400; pv f7+ Kd7 Nf3 Kc7 Qc4 Rb5 cxd6+ Kb8 O-O exd6 d3;
[D]1rbqkb1r/p2p2pp/p3pP2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 10; acn 5235645;
acs 11; ce 642; pv Qe5 gxf6 Qxb8 Bxc5 Nf3 e5 b4 Bb6 Qd6 Bb7;
[D]1rb1kb1r/p2pp1pp/p4P2/q1PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 11; acn
4692878; acs 10; ce 725; pv Qe5 gxf6 Qxb8 Qxc5 d4 Qc6 Nf3 Qe4+ Be3 Qb7 Bf4 Qxb8
Bxb8;
[D]1rbqkb1r/p2p2pp/p4P2/2PQp3/8/8/PP1P1PPP/R1B1K1NR w KQk e6 acd 9; acn 4887816;
acs 10; ce 917; pv Qxe5+ Kf7 fxg7 Bxg7 Qxb8 Re8+ Ne2 Qe7 Qb3+ Kf8 Qe3 Qf7 Qg5;
[D]1rb1kb1r/p2pp1pp/pq3P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 10; acn
4852491; acs 10; ce 1267; pv f7+ Kd8 cxb6 Rxb6 Qa8 Rf6 Qxa7 e6 Ne2 Rxf7 Qd4;
Now, all of these are inconceivably bad, since they lead directly to checkmate:
[D]1r1qkb1r/pb1pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3204;
acs 2; ce 32766; pv f7#;
[D]r1bqkb1r/p2pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3627; acs
1; ce 32766; pv f7#;
[D]2bqkb1r/p2pp1pp/p4P2/2PQ4/8/1r6/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 2973;
acs 1; ce 32766; pv f7#;
[D]2bqkb1r/p2pp1pp/p4P2/2PQ4/1r6/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3322;
acs 1; ce 32766; pv f7#;
[D]2bqkb1r/p2pp1pp/p4P2/1rPQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3575; acs
1; ce 32766; pv f7#;
[D]2bqkb1r/p2pp1pp/pr3P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3788; acs
1; ce 32766; pv f7#;
[D]2bqkb1r/pr1pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3487; acs
1; ce 32766; pv f7#;
[D]1rbqkbr1/p2pp1pp/p4P2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQ - acd 4; acn 3850; acs
1; ce 32766; pv f7#;
[D]2bqkb1r/p2pp1pp/p4P2/2PQ4/8/8/Pr1P1PPP/R1B1K1NR w KQk - acd 4; acn 4003; acs
1; ce 32766; pv f7#;
[D]1rbqkb1r/p2pp1pp/5P2/p1PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3563; acs
1; ce 32766; pv f7#;
[D]1rbqkb1r/p2pp2p/p4P2/2PQ2p1/8/8/PP1P1PPP/R1B1K1NR w KQk g6 acd 4; acn 1066;
acs 1; ce 32766; pv f7#;
[D]1rbqkb1r/p2pp2p/p4Pp1/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 1058; acs
1; ce 32766; pv f7#;
[D]1rbqkb1r/p2pp1p1/p4P2/2PQ3p/8/8/PP1P1PPP/R1B1K1NR w KQk h6 acd 4; acn 1790;
acs 1; ce 32766; pv f7#;
[D]1rbqkb1r/p2pp1p1/p4P1p/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 3267;
acs 1; ce 32766; pv f7#;
But this is the winner for worst possible choice, since it takes only 689 nodes
from here to see that the goose is cooked.
[D]1rbqkb1r/p2pp2p/p4p2/2PQ4/8/8/PP1P1PPP/R1B1K1NR w KQk - acd 4; acn 689; acs
1; ce 32766; pv Qh5#;
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.