10 beautiful testpositions!!

George Tsavdaris · Post by **George Tsavdaris** » Fri Dec 24, 2010 1:50 am

•Play 1.Rc6!! that is the only move that draws.
Very tough for computers i think.
[d]2K3k1/1p6/R3p1p1/1rB1P1P1/8/8/1Pb5/8 w - - 0 1

•Play 1.Re6!! that wins easily!
[d]2bq1b2/1p3k2/1r1p1p1p/pNpP1PpP/P1P3P1/6B1/1P5Q/2K1R3 w - - 0 1

•Play 1.Bg6+!! that wins!
[d]r3r2b/1bpq1k2/2n1pP2/1n1pP1p1/1p1P4/2PB4/PP1QNP1P/R4RK1 w - - 0 1

•Continuation from previous position:
After 1.Bg6+!! Kxg6 2.Qd3+ Kh5 3.Qh3+ Kg6 play:
4.Nf4+! +-
[d]r3r2b/1bpq4/2n1pPk1/1n1pP1p1/1p1P4/2P4Q/PP2NP1P/R4RK1 w - - 0 4

•Continuation from previous position:
And then after 4.Nf4+! gxf4 5.Kh1 Nxe5 6.dxe5 d4+ 7.f3 Bxf3+ 8.Rxf3 Bxf6 9.Rg1+ Bg5 play:
10.Qg2! +-
[d]r3r3/2pq4/4p1k1/1n2P1b1/1p1p1p2/2P2R1Q/PP5P/6RK w - - 0 10

•And a classic one, i guess it will be easy for todays programs:
Play 1.Qf6+!! that wins.
[d]r2q1r2/1b2bpkp/n3p1p1/2ppP1P1/p6R/1PN1BQR1/NPP2P1P/4K3 w - - 0 1

•Only 1.e7!! draws all other moves lose.
OK this is too much for computers. They are standing helpless looking at this problem.

[d]6N1/6p1/1B2P3/6r1/6Pk/5ppP/6P1/7K w - - 0 1

•Play 1.Nb5! that wins.
Todays programs should find it easily.
[d]4kbnr/ppq2ppp/1np1p3/6P1/3r3P/2N2Q2/PPPB1P2/2KR1B1R w k - 0 1

•Play 1...Rxh2! with a win.
I guess this is too easy for todays monsters.
[d]r2q3r/2pkb1p1/p2p1n2/4p1p1/Pp2P1P1/1QP5/1P1P2PP/RNB2RK1 b - - 0 1

•White to play and draw!
Impossible for computers of today i guess.

[d]6b1/ppp1pp1B/2k1p1p1/8/5P2/3PprP1/PPPrPqRP/RnK2nb1 w - -

(I had checked carefully these positions in the past with programs of a different era.
I hope they would not prove incorrect by todays monsters.

)

Ignacio · Post by **Ignacio** » Fri Dec 24, 2010 2:39 am

The last position is mate in -9, but the question is: What was the last white´s move?.
Best.
Ignacio.

Cubeman · Post by **Cubeman** » Fri Dec 24, 2010 9:27 am

The last position to be a draw, with white to move has to be because of the 50 move rule.I can't show that 50 moves have been played with out captures or pawn moves but it is the only explanation.Whites last move would have been Ra1.And black just played Nb1 from some where.

George Tsavdaris · Post by **George Tsavdaris** » Fri Dec 24, 2010 12:17 pm

Ignacio wrote:The last position is mate in -9, but the question is: What was the last white´s move?.

Black's, since it's white to play.

George Tsavdaris · Post by **George Tsavdaris** » Fri Dec 24, 2010 12:21 pm

Cubeman wrote:The last position to be a draw, with white to move has to be because of the 50 move rule.I can't show that 50 moves have been played with out captures or pawn moves but it is the only explanation.Whites last move would have been Ra1.And black just played Nb1 from some where.

Or Kb1 after a check from Nc3+.

For example it could result from this position:
[d]6b1/ppp1pp1B/2k1p1p1/8/5P2/3PprP1/PPPrP1RP/R1Knqnb1 b - -

After ...Qf2 Kb1 Nc3+ Kc1 Nb1
[d]6b1/ppp1pp1B/2k1p1p1/8/5P2/3PprP1/PPPrPqRP/RnK2nb1 w - -

Uri Blass · Post by **Uri Blass** » Fri Dec 24, 2010 2:38 pm

houdini can solve 4 and 5(and I guess it can also solve 3 if I give it enough time).

I used a slow hardware.
I guess it can also solve 2 with enough time but solving 1 is going to be harder for it(still did not look at the other positions).

New game
[d]r3r2b/1bpq4/2n1pPk1/1n1pP1p1/1p1P4/2P4Q/PP2NP1P/R4RK1 w - - 0 1

Analysis by Houdini 1.5 w32:

4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 4/14 00:00:00
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 5/14 00:00:00
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 6/14 00:00:00 2kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 7/14 00:00:00 3kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 8/14 00:00:00 3kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 9/17 00:00:00 4kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 10/19 00:00:00 5kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 11/24 00:00:00 12kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 12/28 00:00:00 27kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 13/28 00:00:00 55kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 14/34 00:00:01 326kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 15/40 00:00:02 1447kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 16/46 00:00:04 2996kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 17/49 00:00:08 5731kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 18/50 00:00:14 10709kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 19/53 00:00:34 25351kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 20/58 00:01:58 93735kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 21/60 00:03:40 176632kN
4.Qh3-d3+ Kg6-h6 5.Qd3-h3+ Kh6-g6
= (0.00) Depth: 22/61 00:06:45 324416kN
4.Ne2-f4+
= (0.06) Depth: 22/75 00:43:18 2013453kN
4.Ne2-f4+
= (0.19) Depth: 22/75 00:54:40 2497406kN
4.Ne2-f4+
² (0.48) Depth: 22/75 01:13:11 3281826kN
4.Ne2-f4+ g5xf4 5.Kg1-h1 Nc6xe5 6.d4xe5 d5-d4+ 7.f2-f3 Bb7xf3+ 8.Rf1xf3 Bh8xf6 9.Ra1-g1+ Bf6-g5 10.Qh3-g2 Qd7-e7 11.Rf3xf4 Nb5-d6 12.e5xd6 c7xd6 13.Qg2-e4+ Kg6-g7 14.c3xb4 Ra8-b8 15.Rg1xg5+ Qe7xg5 16.Rf4-g4 Qg5xg4 17.Qe4xg4+ Kg7-f7 18.Qg4xd4 Kf7-e7 19.a2-a4 e6-e5
± (1.23) Depth: 22/88 02:12:57 5691697kN

(, 24.12.2010)

Uri Blass · Post by **Uri Blass** » Fri Dec 24, 2010 4:04 pm

position number 6 is not easy for houdini and after more than an hour it did not see Qf6+

Maybe houdini has problems in very long time control because of some pruning and maybe not and I did not check at this point of time if houdini can see that white is winning fast after Qf6+

[d]r2q1r2/1b2bpkp/n3p1p1/2ppP1P1/p6R/1PN1BQR1/NPP2P1P/4K3 w - - 0 1

Analysis by Houdini 1.5 w32:

1.Rg3-h3 Rf8-h8 2.b3xa4 Be7xg5 3.Be3xg5 Qd8xg5
= (0.21) Depth: 4/15 00:00:00
1.Rg3-h3 Rf8-h8 2.Na2-c1 a4xb3 3.Nc1xb3 Be7xg5 4.Be3xg5 Qd8xg5
= (-0.05) Depth: 5/15 00:00:00
1.Rg3-h3 Rf8-h8 2.Na2-c1 a4xb3 3.Nc1xb3 Be7xg5 4.Be3xg5 Qd8xg5
= (-0.05) Depth: 6/16 00:00:00 5kN
1.Rg3-h3 h7-h5 2.g5xh6+ Kg7-h8 3.Rh4xa4 Qd8-c7 4.Be3-f4 Bb7-c6 5.Ra4-a3 d5-d4 6.Nc3-e4
³ (-0.33) Depth: 7/21 00:00:00 24kN
1.Rg3-h3 h7-h5 2.g5xh6+ Kg7-h8 3.Rh4xa4 Qd8-c7 4.Be3-f4 Bb7-c6 5.Ra4-a3 c5-c4
³ (-0.34) Depth: 8/22 00:00:00 25kN
1.Rg3-h3 h7-h5 2.g5xh6+ Kg7-h8 3.Rh4xa4 Qd8-c7 4.Be3-f4 Bb7-c6 5.Qf3-e2 Bc6xa4 6.b3xa4 d5-d4 7.Nc3-e4 Qc7-a5+ 8.Ke1-f1 Qa5xa4 9.Rh3-a3
³ (-0.55) Depth: 9/25 00:00:00 106kN
1.Rg3-h3 h7-h5
³ (-0.62) Depth: 10/25 00:00:00 146kN
1.Rg3-h3 h7-h5
µ (-0.80) Depth: 10/28 00:00:00 287kN
1.Rg3-h3 h7-h5
µ (-1.22) Depth: 10/29 00:00:01 386kN
1.b3xa4 Qd8-d7 2.Be3-d2 d5-d4 3.Nc3-e4 Kg7-g8 4.a4-a5 Ra8-b8 5.b2-b3 Qd7-c7 6.Ke1-f1 Qc7xe5 7.Na2-c1
³ (-0.61) Depth: 10/29 00:00:01 470kN
1.b3xa4 Ra8-b8 2.Be3-c1 d5-d4 3.Nc3-e4 h7-h5 4.Ke1-f1 Qd8-d5 5.b2-b3 Qd5xe5 6.Qf3-f4 Qe5-f5 7.Qf4xf5 e6xf5
³ (-0.67) Depth: 11/29 00:00:01 546kN
1.b3xa4 Ra8-b8 2.Be3-c1 d5-d4 3.Nc3-e4 h7-h5 4.Ke1-f1 Qd8-d5 5.b2-b3 Qd5xe5 6.Qf3-f4 Qe5-f5 7.Qf4xf5 e6xf5
³ (-0.67) Depth: 12/29 00:00:01 728kN
1.b3xa4
³ (-0.59) Depth: 13/40 00:00:02 1191kN
1.b3xa4 Ra8-b8
µ (-0.76) Depth: 13/40 00:00:02 1285kN
1.b3xa4 Qd8-b8 2.Be3-f4 d5-d4 3.Nc3-e4 Bb7xe4 4.Qf3xe4 Qb8xb2 5.Na2-c1 Kg7-g8 6.Rg3-h3 h7-h5 7.Rh3-b3 Qb2-a1 8.Ke1-f1 Qa1xa4 9.Rb3-b7 Be7-d8
µ (-0.82) Depth: 13/50 00:00:07 4331kN
1.b3xa4
µ (-0.73) Depth: 14/50 00:00:09 5405kN
1.b3xa4
³ (-0.56) Depth: 14/50 00:00:09 5681kN
1.b3xa4 Qd8-b6 2.Be3-c1 d5-d4 3.Nc3-e4 Na6-b4 4.Na2xb4 Qb6xb4+ 5.c2-c3 d4xc3 6.Qf3xc3 Ra8xa4 7.Rg3-h3 Qb4xc3+ 8.Ne4xc3 Ra4xh4 9.Rh3xh4 Rf8-d8 10.Nc3-e4 Rd8-d4
³ (-0.67) Depth: 14/50 00:00:16 9852kN
1.b3xa4
³ (-0.59) Depth: 15/50 00:00:18 10910kN
1.b3xa4
³ (-0.46) Depth: 15/50 00:00:18 11521kN
1.b3xa4 Qd8-d7 2.Qf3-f4 Rf8-h8 3.Be3-d2 d5-d4 4.Nc3-b5 Kg7-g8 5.Na2-c1 h7-h5 6.g5xh6 Be7xh4 7.Qf4xh4 Na6-b4 8.Bd2xb4 c5xb4 9.Nb5-d6 Bb7-d5 10.Qh4xd4 Rh8xh6
³ (-0.31) Depth: 15/56 00:00:28 17861kN
1.b3xa4
= (-0.25) Depth: 16/56 00:00:46 29263kN
1.b3xa4 Qd8-d7
³ (-0.38) Depth: 16/56 00:01:07 42466kN
1.b3xa4 Na6-b8 2.b2-b4 c5xb4 3.Na2xb4 Nb8-d7 4.Nb4-d3 Qd8-a5 5.Be3-d4 Ra8-c8 6.Rg3-h3 h7-h5 7.g5xh6+ Kg7-h8 8.Nd3-c1 Be7xh4 9.Rh3xh4 Bb7-a6 10.Nc1-b3 Qa5-b4 11.Rh4-g4 Ba6-c4 12.Nb3-d2 Qb4-b2 13.Nd2xc4 Rc8xc4
³ (-0.37) Depth: 16/56 00:01:19 50451kN
1.b3xa4 Na6-b8 2.b2-b4 c5xb4 3.Na2xb4 Nb8-d7 4.Nb4-d3 Qd8-a5 5.Be3-d4 Ra8-c8 6.Rg3-h3 h7-h5 7.g5xh6+ Kg7-h8 8.Nd3-c1 Be7xh4 9.Rh3xh4 Bb7-a6 10.Nc1-b3 Qa5-b4 11.Rh4-g4 Ba6-c4 12.Nb3-d2 Qb4-b2 13.Nd2xc4 Rc8xc4
³ (-0.37) Depth: 17/56 00:01:25 54074kN
1.b3xa4 Na6-b8 2.b2-b4 c5xb4 3.Na2xb4 Nb8-d7 4.Nb4-d3 Qd8-a5 5.Be3-d4 Ra8-c8 6.Rg3-h3 h7-h5 7.g5xh6+ Kg7-h8 8.Nd3-c1 Be7xh4 9.Rh3xh4 Bb7-a6 10.Nc1-b3 Qa5-b4 11.Rh4-g4 Ba6-c4 12.Nb3-d2 Qb4-b2 13.Nd2xc4 Rc8xc4
³ (-0.37) Depth: 18/56 00:01:53 72749kN
1.b3xa4
³ (-0.31) Depth: 19/59 00:02:38 102724kN
1.b3xa4
= (-0.18) Depth: 19/60 00:03:28 131056kN
1.b3xa4 Qd8-d7 2.Qf3-f4 Rf8-h8 3.Be3-d2 d5-d4 4.Nc3-b5 Qd7-d5 5.Na2-c1 Na6-b8 6.Nb5-d6 Be7xd6 7.Qf4-f6+ Kg7-g8 8.e5xd6 Nb8-d7 9.Qf6-e7 Bb7-c6 10.f2-f3 Nd7-e5 11.Rh4-f4 Bc6xa4 12.b2-b3 Ra8-e8
= (-0.18) Depth: 19/65 00:06:45 245194kN
1.b3xa4 Qd8-d7 2.Be3-c1 Rf8-h8 3.b2-b3 Kg7-g8 4.Ke1-f1 h7-h5 5.Kf1-g1 Rh8-h7 6.Bc1-a3 d5-d4 7.Nc3-e4 Qd7-d8 8.Ba3-c1 Qd8-c7 9.c2-c3 Rh7-g7 10.Qf3-f4 Bb7-d5 11.c3-c4 Bd5-c6
= (-0.20) Depth: 20/65 00:07:50 290405kN
1.b3xa4 Qd8-d7 2.Be3-c1 Rf8-h8 3.b2-b3 Kg7-g8 4.Ke1-f1 h7-h5 5.Qf3-f4 Rh8-h7 6.Kf1-g1 Na6-c7 7.Bc1-a3 Qd7-d8 8.Na2-c1 d5-d4 9.Nc3-e4 Bb7xe4 10.Qf4xe4 Be7xg5 11.Rh4-h3 h5-h4 12.Rg3-g4 Nc7-d5 13.Nc1-d3 Nd5-c3
= (-0.25) Depth: 21/65 00:09:54 378940kN
1.b3xa4
= (-0.18) Depth: 22/65 00:15:51 632254kN
1.b3xa4 Qd8-d7 2.Be3-c1 Rf8-h8 3.b2-b3 Kg7-g8 4.Ke1-f1 h7-h5 5.Qf3-f4 Rh8-h7 6.Bc1-a3 Ra8-b8 7.Na2-c1 Na6-b4 8.Ba3xb4 Bb7-a6+ 9.Nc3-b5 c5xb4 10.Nc1-d3 Ba6xb5 11.a4xb5 Qd7xb5 12.Qf4-d2
= (-0.16) Depth: 22/66 00:25:03 990487kN
1.b3xa4 Qd8-d7 2.Be3-d2 Rf8-h8 3.b2-b3 Kg7-g8 4.Qf3-f4 Na6-c7 5.Rg3-f3 Ra8-f8 6.Ke1-f1 Qd7-c6 7.Na2-c1 d5-d4 8.Nc3-e4 c5-c4 9.b3xc4 Qc6xc4+ 10.Rf3-d3 Nc7-d5 11.Qf4-f3 Qc4xa4 12.Kf1-g2
= (-0.14) Depth: 23/70 00:55:30 2179426kN
1.b3xa4 Qd8-d7
= (-0.21) Depth: 24/70 01:02:16 2500538kN

(, 24.12.2010)

zullil · Post by **zullil** » Fri Dec 24, 2010 4:45 pm

Strange. Crafty finds it in 5 minutes:

Code: Select all

Crafty v23.4 (16 cpus)

White(1): setboard r2q1r2/1b2bpkp/n3p1p1/2ppP1P1/p6R/1PN1BQR1/NPP2P1P/4K3 w - - 0 1
White(1): st 3600
search time set to 3600.00.
White(1): display stats
display statistics at end of each search.
White(1): go
              time limit 60:00 (+0.00) (60:00)
              depth   time  score   variation (1)
starting thread 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 <done>
                9->   0.07   0.77   1. bxa4 Kg8 2. Kf1 Nb4 3. Bxc5 Ba6+
                                    4. Kg1 Nxc2 5. Bxe7 Qxe7 (s=2)
               10     0.09     +1   1. bxa4!                         
               10     0.14   0.39   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3
               10->   0.17   0.39   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3 (s=3)
               11     0.18   0.39   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3 (s=2)
               11->   0.22   0.39   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3 (s=5)
               12     0.24   0.06   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3 h5
                                    (s=4)
               12->   0.36   0.06   1. Rgh3 Rh8 2. bxa4 Rb8 3. Bd2 Bxg5
                                    4. Bxg5 Qxg5 5. Qg3 Qxg3 6. hxg3 h5
                                    (s=4)
               13     0.42     -1   1. Rgh3?                          
               13     0.45  -0.63   1. Rgh3 Rh8 2. bxa4 Rb8 3. Rxh7+ Rxh7
                                    4. Rxh7+ Kxh7 5. Qxf7+ Kh8 6. Qxg6
                                    Bc8 7. Qh6+ Kg8 8. b3 (s=3)
               13     0.64  -0.56   1. Qg4 h5 2. gxh6+ Kh7 3. Bg5 Bxg5
                                    4. Qxg5 axb3 5. cxb3 d4 6. Qxd8 Rfxd8
                                    7. Nb5 Kh8 (s=2)
               13     0.89   0.18   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh7
                                    4. Rf4 d4 5. Rxf7+ Kh8 6. Rxf8+ Rxf8
                                    7. Qg4 dxc3 8. b3
               13->   0.92   0.18   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh7
                                    4. Rf4 d4 5. Rxf7+ Kh8 6. Rxf8+ Rxf8
                                    7. Qg4 dxc3 8. b3 (s=2)
               14     1.06   0.26   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh7
                                    4. Rf4 d4 5. Rxf7+ Kh8 6. Rxf8+ Rxf8
                                    7. Qg4 dxe3 8. Rxe3 Qxb2 9. Qxe6
               14->   1.13   0.26   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh7
                                    4. Rf4 d4 5. Rxf7+ Kh8 6. Rxf8+ Rxf8
                                    7. Qg4 dxe3 8. Rxe3 Qxb2 9. Qxe6
               15     1.38   0.02   1. bxa4 Rb8 2. Qf4 h5 3. gxh6+ Kh8
                                    4. Rhg4 d4 5. Bxd4 cxd4 6. Qxd4 Qxd4
                                    7. Rxd4 Rbd8 8. Rgd3 Kh7
               15->   1.55   0.02   1. bxa4 Rb8 2. Qf4 h5 3. gxh6+ Kh8
                                    4. Rhg4 d4 5. Bxd4 cxd4 6. Qxd4 Qxd4
                                    7. Rxd4 Rbd8 8. Rgd3 Kh7 (s=2)
               16     2.15   0.10   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh8
                                    4. Qg3 d4 5. Bg5 dxc3 6. Bxe7 cxb2
                                    7. Bf6+ Kh7 8. Nc3 b1=Q+ 9. Nxb1 Qxb1+
                                    10. Kd2 Nb4
               16->   2.69   0.10   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh8
                                    4. Qg3 d4 5. Bg5 dxc3 6. Bxe7 cxb2
                                    7. Bf6+ Kh7 8. Nc3 b1=Q+ 9. Nxb1 Qxb1+
                                    10. Kd2 Nb4 (s=2)
               17     3.98   0.24   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh8
                                    4. Qg3 d4 5. Bg5 dxc3 6. Nxc3 Bxg5
                                    7. Qxg5 Qd8 8. Qf4 Nb4 9. h7 Nxc2+
                                    10. Kf1
               17->   4.29   0.24   1. bxa4 Qb6 2. Rgh3 h5 3. gxh6+ Kh8
                                    4. Qg3 d4 5. Bg5 dxc3 6. Nxc3 Bxg5
                                    7. Qxg5 Qd8 8. Qf4 Nb4 9. h7 Nxc2+
                                    10. Kf1
               18     7.89     +1   1. bxa4!                          
               18    17.82   0.61   1. bxa4 Nb4 2. Nxb4 cxb4 3. Nb5 Rxa4
                                    4. Rgh3 Ra1+ 5. Kd2 h5 6. gxh6+ Kh8
                                    7. Rf4 Ba6 8. Nd6 f5 9. Bc5 Bg5 10.
                                    Bxb4 Bxf4+ 11. Qxf4
               18->  18.45   0.61   1. bxa4 Nb4 2. Nxb4 cxb4 3. Nb5 Rxa4
                                    4. Rgh3 Ra1+ 5. Kd2 h5 6. gxh6+ Kh8
                                    7. Rf4 Ba6 8. Nd6 f5 9. Bc5 Bg5 10.
                                    Bxb4 Bxf4+ 11. Qxf4
               19    19.16     -1   1. bxa4?                          
               19    19.64   0.25   1. bxa4 Nb4 2. Nxb4 cxb4 3. Nb5 Rxa4
                                    4. Rgh3 Ra1+ 5. Kd2 h5 6. gxh6+ Kh8
                                    7. Rd4 Ba6 8. Nd6 Bxd6 9. exd6 Bf1
                                    10. Bf4 Bxh3 11. Qxh3
               19->  24.45   0.25   1. bxa4 Nb4 2. Nxb4 cxb4 3. Nb5 Rxa4
                                    4. Rgh3 Ra1+ 5. Kd2 h5 6. gxh6+ Kh8
                                    7. Rd4 Ba6 8. Nd6 Bxd6 9. exd6 Bf1
                                    10. Bf4 Bxh3 11. Qxh3 (s=8)
               20    26.99     +1   1. bxa4!                          
               20     1:19   0.32   1. bxa4 h5 2. gxh6+ Kh8 3. Rf4 Qd7
                                    4. Rxf7 d4 5. Rxf8+ Rxf8 6. Qg4 dxe3
                                    7. Rxe3 Kh7 8. f4 Kxh6 9. Rg3 Rg8 10.
                                    Rd3 Qc8 11. Rg3 (s=7)
               20->   1:22   0.32   1. bxa4 h5 2. gxh6+ Kh8 3. Rf4 Qd7
                                    4. Rxf7 d4 5. Rxf8+ Rxf8 6. Qg4 dxe3
                                    7. Rxe3 Kh7 8. f4 Kxh6 9. Rg3 Rg8 10.
                                    Rd3 Qc8 11. Rg3
               21     1:26   0.39   1. bxa4 h5 2. gxh6+ Kh8 3. Rf4 Qd7
                                    4. Rxf7 d4 5. Rxf8+ Rxf8 6. Qg4 dxe3
                                    7. Rxe3 Kh7 8. Rd3 Qc6 9. f4 Kxh6 10.
                                    Rg3 Qe8 11. Ne2 Bd5
               21->   1:31   0.39   1. bxa4 h5 2. gxh6+ Kh8 3. Rf4 Qd7
                                    4. Rxf7 d4 5. Rxf8+ Rxf8 6. Qg4 dxe3
                                    7. Rxe3 Kh7 8. Rd3 Qc6 9. f4 Kxh6 10.
                                    Rg3 Qe8 11. Ne2 Bd5
               22     1:40   0.44   1. bxa4 h5 2. gxh6+ Kh8 3. Rhg4 Rb8
                                    4. Bd2 d4 5. Ne4 Bxe4 6. Qxe4 Rxb2
                                    7. Nc1 Nb4 8. c3 Nc2+ 9. Kf1 dxc3 10.
                                    Bxc3 Qd1+ 11. Kg2 Qxc1 12. Bxb2 Qxb2
                                    13. a5
               22->   1:54   0.44   1. bxa4 h5 2. gxh6+ Kh8 3. Rhg4 Rb8
                                    4. Bd2 d4 5. Ne4 Bxe4 6. Qxe4 Rxb2
                                    7. Nc1 Nb4 8. c3 Nc2+ 9. Kf1 dxc3 10.
                                    Bxc3 Qd1+ 11. Kg2 Qxc1 12. Bxb2 Qxb2
                                    13. a5 (s=2)
               23     3:22   0.61   1. bxa4 Rb8 2. Qf4 Rh8 3. Nb5 d4 4.
                                    Bc1 Qa5+ 5. Kd1 Qxa4 6. Nd6 Rbf8 7.
                                    Nc3 Qd7 8. Nxb7 Qxb7 9. Ne4 Nb4 10.
                                    Rf3 Qb5 11. Kd2 Qc4 12. c3 dxc3+ 13.
                                    bxc3
               23->   3:39   0.61   1. bxa4 Rb8 2. Qf4 Rh8 3. Nb5 d4 4.
                                    Bc1 Qa5+ 5. Kd1 Qxa4 6. Nd6 Rbf8 7.
                                    Nc3 Qd7 8. Nxb7 Qxb7 9. Ne4 Nb4 10.
                                    Rf3 Qb5 11. Kd2 Qc4 12. c3 dxc3+ 13.
                                    bxc3
               24     3:58   0.62   1. bxa4 Rb8 2. Qf4 Rh8 3. Nb5 d4 4.
                                    Bc1 Qa5+ 5. Kd1 Qxa4 6. Nd6 Rbf8 7.
                                    Nc3 Qd7 8. Nxb7 dxc3+ 9. Nd6 Nb4 10.
                                    Rf3 cxb2 11. Bxb2 Qa4 12. Rb3 Qa2 13.
                                    Kd2
               24     4:28     +1   1. Qf6+!                          
               24     4:29     +3   1. Qf6+!                          
               24     4:50     +M   1. Qf6+!                          
               24     5:31   5.01   1. Qf6+ Bxf6 2. gxf6+ Qxf6 3. Bh6+
                                    Kg8 4. exf6 d4 5. Bg7 h5 6. Rgh3 Kh7
                                    7. Ne2 e5 8. Bxf8 Rxf8 9. bxa4 Re8
                                    10. Rb3 Bd5 11. Rb6 Re6 12. Rxe6 Bxe6
                                    13. b3 c4

GARGAMEL · Post by **GARGAMEL** » Fri Dec 24, 2010 4:51 pm

Hello Uri

and with a very fast Hardware:

Analysis by Houdini 1.5 x64:
1.Dd3+ Kh6 2.Dh3+ Kg6
= (0.00) Tiefe: 6/14 00:00:00 2kN
= (0.00) Tiefe: 20/61 00:00:15 223mN
1.Sf4!!+ gxf4 2.Kh1 Sxe5 3.dxe5 d4+ 4.f3 Lxf3+ 5.Txf3 Lxf6 6.Tg1+ Lg5 7.Dg2 De7 8.Txf4 Sd6 9.exd6 cxd6 10.De4+ Kg7 11.cxb4 Tab8 12.Txg5+ Dxg5 13.Tg4 Dxg4 14.Dxg4+ Kf7 15.Dxd4 Ke7 16.a4 e5 17.Dh4+ Kd7 18.Dh7+ Ke6 19.b5 Tf8 20.Dh3+ Ke7 21.De3 Ta8 22.De4 Tab8 23.Kg2 Tf4 24.Dh7+ Ke6 25.Dg6+ Kd5 26.Dd3+ Kc5 27.Dc2+ Kb4
= (0.06) Tiefe: 20/61 00:00:23 326mN
+/- (1.32) Tiefe: 22/78 00:03:03 2649mN

regards Anton

George Tsavdaris · Post by **George Tsavdaris** » Fri Dec 24, 2010 5:05 pm

zullil wrote:Strange. Crafty finds it in 5 minutes:

Why do you think it's strange?

10 beautiful testpositions!!

10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!

Re: 10 beautiful testpositions!!