Author: Dann Corbit
Date: 21:34:04 06/29/04
Go up one level in this thread
For this position, it looks like exd6 and Rfd8 probably also win (both up a
rook):
Position 1 - Black to play
--------------------------
ID = "30.5.IQ.1135"
FEN = 2r2rk1/4p2p/bq1P2p1/p4p2/3R1P1B/2N5/P2Qp1PP/6K1 b - -
. . r . . r k .
. . . . p . . p
b q . P . . p .
p . . . . p . .
. . . R . P . B
. . N . . . . .
P . . Q p . P P
. . . . . . K .
Current Position = 3.94
Number of Possible Moves = 45
6 539 50 87745 exd6 Be1 Bc4 Kh1 Rfd8 Rxc4 Rxc4 Nxe2
7 542 172 326071 exd6 Be1 Rfe8 Nd5 Qd8 Bf2 Rc5
8 534 640 1351930 exd6 Be1 Rfe8 Nd5 Qd8 Qb2 Rc4 Rd3
9 526 4003 8979880 exd6 Be1 Rfe8 Nd5 Qd8 Ra4 Rc5 Bf2 Re6
9 548 13833 32538349 Rfd8 Nxe2 Bxe2 Bxe7 Rd7 h3 Rc4 Bf6 Rxd4
9 548 18000 41733109 Rfd8 Nxe2 Bxe2 Bxe7 Rd7 h3 Rc4 Bf6 Rxd4
Search Time : 180.0 Seconds
Total Nodes Searched : 41733109 (79.4% Qui)
Total Nodes Evaluated : 33107380
Cuts : Delta 0 : SEE 7047477 : Mate 0
: Razor 512557 : Eval 1283510
Extensions : Check 1211004 : OneRep 159882 : CMThreat 18113
: Pawn 299578 : Recap 149796 : RevCheck 165343
Hash Stores (Size) : 7901859 (11184799)
Hash Probes (Hits) : 29200542 (6582983)
EGTB Probes (Hits) : 0 (0)
Move Ordering : 83.2%
Best Move = Rfd8
Move Score = 548
--Answer: Rxc3 !! Incorrect !!
Correct So Far : 0/1
This position appears to have several winning moves:
Position 3 - White to play
--------------------------
ID = "52.6.IQ.949"
FEN = 5r1k/1b1P3p/4Q1pb/8/P7/4N1PP/1P2r3/R2R2K1 w - -
. . . . . r . k
. b . P . . . p
. . . . Q . p b
. . . . . . . .
P . . . . . . .
. . . . N . P P
. P . . r . . .
R . . R . . K .
Current Position = 14.14
Number of Possible Moves = 47
5 800 52 116750 Qe5+ Kg8 Rd5 Bxe3+ Kh1 Rd2 Qe6+ Kh8
6 800 85 196657 Qe5+ Kg8 Rd5 Bxe3+ Kh1 Rd2 Qe6+ Kh8 Qe5+ Kg8
&rep.
7 801 185 458979 Qe5+ Kg8 Rd5 Bxe3+ Kh1 Rd8 Rf1 Bxd5+ Qxd5+ Kg7
b4
8 852 547 1654421 Qe5+ Kg8 Rd5 Bxe3+ Kh1 Bb6 Qxe2 Bxd5+ Kh2 Kh8
8 855! 1093 3622666 Rd5 Bxe3+ Kh1 Bxd5+ Qxd5 Bb6 Qd6 Bc5 Qxc5 Rb8
8 871 1138 3764680 Rd5 Bxe3+ Kh1 Bb6 Qxe2 Bxd5+ Kh2 Kg8 b4 Ra8
9 817? 1894 6585617 Rd5 Bxe3+ Kh1 Ref2 Qe5+ Kg8 Re1 Bb6 Qe6+ R2f7
Qe5
9 779 4649 17528818 Rd5 Bxe3+ Kh1 Ref2 Qe5+ Kg8 Qd6 Bg5 Rad1 Kf7
9 817 5063 18920075 Qf6+ Rxf6 d8=q+ Rf8 Qd4+ Bg7 Qa7 Rxb2 Nf5 gxf5
Qd4
10 844 7132 26386111 Qf6+ Rxf6 d8=q+ Rf8 Qd4+ Bg7 Qc5 Bh6 Qc3+ Bg7
Qc7 Bxb2 Re1 Ba6 Rxe2 Bxa1
11 844 18003 66151550 Qf6+ Rxf6 d8=q+ Rf8 Qd4+ Bg7 Qc5 Bc8 Rf1 Rd8 Qe7
Re1
Search Time : 180.0 Seconds
Total Nodes Searched : 66151550 (76.1% Qui)
Total Nodes Evaluated : 50208363
Cuts : Delta 0 : SEE 4086540 : Mate 0
: Razor 528648 : Eval 6827529
Extensions : Check 3543416 : OneRep 506319 : CMThreat 34114
: Pawn 310529 : Recap 80206 : RevCheck 364416
Hash Stores (Size) : 12368293 (11184799)
Hash Probes (Hits) : 46664593 (7737537)
EGTB Probes (Hits) : 1 (1)
Move Ordering : 88.9%
Best Move = Qf6+
Move Score = 844
--Answer: Qf6+ ** Correct **
Time To Solution = 50.63 sec
Correct So Far : 2/3
Bxb7 may be nearly as good as the suggested move:
Position 5 - White to play
--------------------------
ID = "57.6.IQ.966"
FEN = 1k1r2r1/pp3p1p/B2q1n2/8/3Pb1p1/2Q5/PR3PPP/2B1R1K1 w - -
. k . r . . r .
p p . . . p . p
B . . q . n . .
. . . . . . . .
. . . P b . p .
. . Q . . . . .
P R . . . P P P
. . B . R . K .
Current Position = 0.81
Number of Possible Moves = 51
5 64 84 109302 Qa5 Rge8 Be3 Qf8
5 69 101 128385 Qc4 Rc8 Qb5 Rc7 Bg5
6 30 131 167560 Qc4 Rc8 Qa4 Ka8 Bb5 Rgd8
6 46 185 241499 Qa5 Rd7 Be3 Rgd8 Rc1 Qf8
6 49 315 431709 Bc4 Qc7 Bd2 Rge8 Ba6 Qxc3 Bxc3
7 34 521 785801 Bc4 Qxd4 Qxd4 Rxd4 Bxf7 Rgd8 Rbe2
7 56 654 996149 Qa5 Rd7 Bb5 Rc7 Be3 Nd5 Rc1 Nxe3 Rxc7 Qxc7 Qxc7+
Kxc7 fxe3
8 40 1534 2609109 Qa5 Rd7 Bb5 Rc7 Be3 Rgc8 d5 b6
8 54 2570 4642438 Bc4 Qc7 Bd2 h5 Bb3 Qxc3 Bxc3 Bd5
8 110! 2643 4807179 Bxb7 Qc7 Qxc7+ Kxc7 Rxe4 h6
8 279 3143 6867732 Bxb7 Bxb7 Bf4 Qxf4 Rxb7+ Ka8 Qc5 Qxh2+ Kxh2 Kxb7
9 333! 3793 8260195 Bxb7 Bxb7 Bf4 Qe5 dxe5 Rd2
9 602 5015 11421355 Bxb7 Bxb7 Bf4 Ka8 Bxd6 Rxd6 Re7 Rd7 Qb4
9 793 7970 18491096 Bf4 Qxf4 Bxb7 Qc7 Bxe4+ Kc8 Bb7+ Kd7 Re7+ Kxe7
Qxc7+ Nd7 Bd5
10 828 11178 25913876 Bf4 Qxf4 Bxb7 Qc7 Bxe4+ Kc8 Bb7+ Kd7 Re7+ Kxe7
Qxc7+ Nd7 Be4 Kf6 Bxh7
10 828 18002 43288088 Bf4 Qxf4 Bxb7 Qc7 Bxe4+ Kc8 Bb7+ Kd7 Re7+ Kxe7
Qxc7+ Nd7 Be4 Kf6 Bxh7
Search Time : 180.0 Seconds
Total Nodes Searched : 43288088 (76.8% Qui)
Total Nodes Evaluated : 33227415
Cuts : Delta 0 : SEE 6516178 : Mate 0
: Razor 1240992 : Eval 2299100
Extensions : Check 2143103 : OneRep 205295 : CMThreat 33622
: Pawn 8743 : Recap 67541 : RevCheck 142318
Hash Stores (Size) : 8207488 (11184799)
Hash Probes (Hits) : 30029004 (5921511)
EGTB Probes (Hits) : 0 (0)
Move Ordering : 90.2%
Best Move = Bf4
Move Score = 828
--Answer: Bf4 ** Correct **
Time To Solution = 79.70 sec
Correct So Far : 4/5
Rb3 is probably worth investigating here:
Position 8 - Black to play
--------------------------
ID = "85.6.IQ.1146"
FEN = 1r2r1k1/p1p2p1p/6p1/8/8/4NBPb/qBQ2K1P/1R6 b - -
. r . . r . k .
p . p . . p . p
. . . . . . p .
. . . . . . . .
. . . . . . . .
. . . . N B P b
q B Q . . K . P
. R . . . . . .
Current Position = 1.86
Number of Possible Moves = 45
5 214 45 47236 Rb3 Nc4 Bf5 Ra1 Rxb2 Qxb2 Qxc4 Rxa7
5 313 57 61050 Rxe3 Kxe3 Rb3+ Kf4 g5+ Kxg5 Rxf3 Qxc7 Qxb1 Qxa7
6 279 93 121373 Rxe3 Kxe3 Bf5 Be4 Re8 Qxc7 Rxe4+ Kd2
6 356 114 160615 Rb3 Bd5 Rexe3 Ra1 Rf3+ Bxf3 Qxb2 Qxb2 Rxb2+
7 356 273 454390 Rb3 Bd5 Rexe3 Ra1 Rf3+ Bxf3 Qxb2 Qxb2 Rxb2+
8 347 701 1488104 Rb3 Bd5 Rexe3 Ra1 Rf3+ Bxf3 Qxb2 Qxb2 Rxb2+ Ke3
Rxh2 Rxa7
8 356 1114 2610452 Rxe3 Kxe3 Bf5 Be4 Re8 Be5 Qxc2 Bxc2 Bxc2
9 356 4776 11782439 Rxe3 Kxe3 Bf5 Be4 Re8 Be5 Qxc2 Bxc2 Bxc2
10 324 17621 46330565 Rxe3 Kxe3 Bf5 Be4 Qb3+ Kd2 Rd8+ Ke2 Qxc2+ Bxc2
Bxc2 Rc1 Re8+ Kd2
10 324 18004 47515539 Rxe3 Kxe3 Bf5 Be4 Qb3+ Kd2 Rd8+ Ke2 Qxc2+ Bxc2
Bxc2 Rc1 Re8+ Kd2
Search Time : 180.0 Seconds
Total Nodes Searched : 47515539 (77.3% Qui)
Total Nodes Evaluated : 36722426
Cuts : Delta 0 : SEE 8131364 : Mate 0
: Razor 608530 : Eval 1506909
Extensions : Check 2711005 : OneRep 193667 : CMThreat 22879
: Pawn 163 : Recap 142254 : RevCheck 28465
Hash Stores (Size) : 9913994 (11184799)
Hash Probes (Hits) : 35557662 (5658973)
EGTB Probes (Hits) : 0 (0)
Move Ordering : 84.8%
Best Move = Rxe3
Move Score = 324
--Answer: Rxe3 ** Correct **
Time To Solution = 11.14 sec
Correct So Far : 7/8
Some other moves may have chances here:
Position 16 - White to play
---------------------------
ID = "105.7.IQ.1008"
FEN = r2q1rk1/1p1bbppp/p1n1p3/2p1P2Q/4N3/6P1/PPPB1PBP/3RR1K1 w - -
r . . q . r k .
. p . b b p p p
p . n . p . . .
. . p . P . . Q
. . . . N . . .
. . . . . . P .
P P P B . P B P
. . . R R . K .
Current Position = 0.47
Number of Possible Moves = 47
5 109 51 45134 Be3 g6 Qh6 Nxe5 Bxc5 Bxc5 Nxc5
6 122 126 141857 Be3 g6 Qe2 Nxe5 Nxc5 Qc7 Bxb7
7 122 299 398143 Be3 g6 Qe2 Nxe5 Nxc5 Qc7 Bxb7
7 156 863 1252450 Bc3 Kh8 Nd6 g6 Qf3 Qc7 Nxf7+ Kg8
8 129 1194 1799130 Bc3 Re8 Nd6 g6 Qh6 Bg5 Qh3 Re7 Nxb7
8 134 2082 3569825 Bg5 g6 Bxe7 Qxe7 Nf6+ Qxf6 exf6 gxh5 Rxd7
9 135 3048 5254254 Bg5 g6 Bxe7 Qxe7 Nf6+ Qxf6 exf6 gxh5 Rxd7 Rab8
9 155 3501 6000790 Bc3 Re8 Nd6 Rf8 Nxb7 Qc7 Nd6 f6 Be4 Nxe5
9 188! 3929 6749631 Nf6+ gxf6 exf6 Bxf6 Be4 Bc3 bxc3 f5 Bxc6 a5
9 188 4288 7427839 Nf6+ gxf6 exf6 Bxf6 Be4 Re8 Qg4+ Bg7 Bh6 Qf6 Rf1
10 242! 7117 12471967 Nf6+ gxf6 exf6 Bxf6 Be4 Re8 Qxh7+ Kf8 Bg6 Bg7
Bh6 Ke7 Bxg7 Rg8 Bh5
10 242 7841 13871396 Nf6+ gxf6 exf6 Bxf6 Be4 Re8 Qxh7+ Kf8 Bg6 Bg7
Bh6 Ke7 Bxg7 Rg8 Bh5
11 296! 16595 28642825 Nf6+ gxf6 exf6 Bxf6 Be4 Re8 Qxh7+ Kf8 Bg6 Bg7
Bh6 Ke7 Bxg7 Qb6 Bh5 Ne5
Search Time : 180.0 Seconds
Total Nodes Searched : 31190927 (81.8% Qui)
Total Nodes Evaluated : 25522623
Cuts : Delta 0 : SEE 8784875 : Mate 0
: Razor 1066263 : Eval 444785
Extensions : Check 699797 : OneRep 118569 : CMThreat 12367
: Pawn 83462 : Recap 58261 : RevCheck 39524
Hash Stores (Size) : 4862680 (11184799)
Hash Probes (Hits) : 21846632 (4337174)
EGTB Probes (Hits) : 0 (0)
Move Ordering : 87.2%
Best Move = Nf6+
Move Score = 296
--Answer: Nf6+ ** Correct **
Time To Solution = 39.29 sec
Correct So Far : 14/16
This position gives Kf3 up a full piece. What score does the alternative get?
Position 12 - White to play
---------------------------
ID = "98.7.IQ.985"
FEN = 8/2bP1Q1p/6pk/p3p3/P1Bp4/1P1R2KP/5PP1/2q4r w - -
. . . . . . . .
. . b P . Q . p
. . . . . . p k
p . . . p . . .
P . B p . . . .
. P . R . . K P
. . . . . P P .
. . q . . . . r
Current Position = 2.48
Number of Possible Moves = 34
6 295 74 127821 Kf3 Qg5 Qf8+ Kh5 g4+ Kh4 Kg2 e4 Rxd4 Rxh3
7 295 304 607460 Kf3 Qg5 Qf8+ Kh5 g4+ Kh4 Kg2 e4 Rxd4 Rxh3
8 302 1293 2908047 Kf3 Qg5 Qf8+ Kh5 g4+ Kh4 Kg2 e4 Rxd4 Rh2+ Kf1
Bd8
9 314 5796 14032734 Kf3 Qg5 Qf8+ Kh5 g4+ Kh4 Kg2 e4 Rxd4 Rxh3 Kf1
Qd8 Qxd8+ Bxd8 Rxe4
10 314 18000 44273489 Kf3 Qg5 Qf8+ Kh5 g4+ Kh4 Kg2 e4 Kxh1 exd3 f4 Qd8
Qh6+ Kg3 Qxh7
Search Time : 180.0 Seconds
Total Nodes Searched : 44273489 (76.3% Qui)
Total Nodes Evaluated : 33711447
Cuts : Delta 0 : SEE 8649621 : Mate 0
: Razor 345529 : Eval 3002982
Extensions : Check 3603449 : OneRep 435874 : CMThreat 30462
: Pawn 655414 : Recap 74773 : RevCheck 113984
Hash Stores (Size) : 9971497 (11184799)
Hash Probes (Hits) : 33413869 (4469790)
EGTB Probes (Hits) : 0 (0)
Move Ordering : 88.8%
Best Move = Kf3
Move Score = 314
--Answer: Re3 !! Incorrect !!
Correct So Far : 10/12
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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