Rf6!

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Jack Lad
Posts: 8557
Joined: Wed Mar 08, 2006 10:01 pm
Location: UK

Rf6!

Post by Jack Lad »

[d] r1b1krq1/4b3/1p2p1p1/p2pP1P1/1P1P3p/2PQ3B/5RP1/3KR2N w

This just holds the draw after 1. Rf6 Kd8 2. Rxg6 Qf7 3. b5 a4 4. Rf6 Bxf6 5. gxf6 but wins if black takes the rook immediately e.g. 1. Rf6 Bxf6 2. exf6! 8-)

[d] r1b1krq1/8/1p2pPp1/p2p2P1/1P1P3p/2PQ3B/6P1/3KR2N b
Now cracks a noble heart.—Good night, sweet Princess, And flights of angels sing thee to thy rest!
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bob
Posts: 20943
Joined: Mon Feb 27, 2006 7:30 pm
Location: Birmingham, AL

Re: Rf6!

Post by bob »

Jack Lad wrote:[d] r1b1krq1/4b3/1p2p1p1/p2pP1P1/1P1P3p/2PQ3B/5RP1/3KR2N w

This just holds the draw after 1. Rf6 Kd8 2. Rxg6 Qf7 3. b5 a4 4. Rf6 Bxf6 5. gxf6 but wins if black takes the rook immediately e.g. 1. Rf6 Bxf6 2. exf6! 8-)

[d] r1b1krq1/8/1p2pPp1/p2p2P1/1P1P3p/2PQ3B/6P1/3KR2N b
Crafty finds this almost instantly, although it takes just over a minute to see a draw score:

Code: Select all

               13     2.69     +1   1. Rf6!!
               13     3.29  -0.33   1. Rf6 Bxf6 2. exf6 Kd8 3. Qb5 Kc7
                                    4. bxa5 Rxa5 5. Qf1 Ra1+ 6. Kc2 Rxe1
                                    7. Qxe1 Qf7 8. Qxh4
               13->   3.29  -0.33   1. Rf6 Bxf6 2. exf6 Kd8 3. Qb5 Kc7
                                    4. bxa5 Rxa5 5. Qf1 Ra1+ 6. Kc2 Rxe1
                                    7. Qxe1 Qf7 8. Qxh4 (s=2)
               14     5.18  -0.58   1. Rf6 Kd8 2. bxa5 Bxf6 3. exf6 bxa5
                                    4. c4 dxc4 5. Qxc4 a4 6. Bxe6 Bxe6
                                    7. Rxe6 Qf7 8. Qd5+ Kc7
               14->   6.26  -0.58   1. Rf6 Kd8 2. bxa5 Bxf6 3. exf6 bxa5
                                    4. c4 dxc4 5. Qxc4 a4 6. Bxe6 Bxe6
                                    7. Rxe6 Qf7 8. Qd5+ Kc7 (s=2)
               15     8.71  -0.45   1. Rf6 Kd8 2. bxa5 Bxf6 3. exf6 bxa5
                                    4. c4 dxc4 5. Qxc4 Qh7 6. Qc5 Re8 7.
                                    Kd2 a4 8. Rc1
               15->  10.07  -0.45   1. Rf6 Kd8 2. bxa5 Bxf6 3. exf6 bxa5
                                    4. c4 dxc4 5. Qxc4 Qh7 6. Qc5 Re8 7.
                                    Kd2 a4 8. Rc1
               16    14.46     +1   1. Rf6!!
               16    15.33  -0.09   1. Rf6 Bxf6 2. exf6 Kd8 3. bxa5 bxa5
                                    4. c4 dxc4 5. Qxc4 Ra6 6. Re5 Rb6 7.
                                    Rd5+ Bd7 8. Rxa5 Rb1+ 9. Ke2 Rb2+ 10.
                                    Ke3
               16->  16.96  -0.09   1. Rf6 Bxf6 2. exf6 Kd8 3. bxa5 bxa5
                                    4. c4 dxc4 5. Qxc4 Ra6 6. Re5 Rb6 7.
                                    Rd5+ Bd7 8. Rxa5 Rb1+ 9. Ke2 Rb2+ 10.
                                    Ke3 (s=3)
               17    36.87     -1   1. Rf6
               17    59.19  -0.11   1. Rf6 Kd8 2. bxa5 bxa5 3. Rxg6 Qh7
                                    4. Kd2 Rb8 5. Rf6 Rb2+ 6. Ke3 Bxf6
                                    7. exf6 Qh5 8. Kf4 a4 9. Qd1 Qe8 (s=2)
               17->   1:04  -0.11   1. Rf6 Kd8 2. bxa5 bxa5 3. Rxg6 Qh7
                                    4. Kd2 Rb8 5. Rf6 Rb2+ 6. Ke3 Bxf6
                                    7. exf6 Qh5 8. Kf4 a4 9. Qd1 Qe8
                                    7. exf6 Qh5 8. Kf4 a4 9. Qd1 Qe8
               18     1:21   0.01   1. Rf6 Kd8 2. bxa5 bxa5 3. c4 Bxf6
                                    4. exf6 dxc4 5. Qa3 Rf7 6. Qd6+ Rd7
                                    7. Qb6+ Rc7 8. Qd6+ Rd7
               18->   1:28   0.01   1. Rf6 Kd8 2. bxa5 bxa5 3. c4 Bxf6
                                    4. exf6 dxc4 5. Qa3 Rf7 6. Qd6+ Rd7
                                    7. Qb6+ Rc7 8. Qd6+ Rd7
               19     2:25   0.00   1. Rf6 Kd8 2. bxa5 Bxf6 3. exf6 Rxa5
                                    4. Nf2 Qf7 5. Qb1 Qc7 6. Bxe6 Qxc3
                                    7. Qxb6+ Qc7 8. Qb2 Bxe6 9. Rxe6 Rf7
                                    <HT>
              time=2:28  mat=0  n=2502378066  fh=90%  nps=16.8M
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Deep Fritz 1

Post by kgburcham »

[d] r1b1krq1/4b3/1p2p1p1/p2pP1P1/1P1P3p/2PQ3B/5RP1/3KR2N w q - 0 1

Deep Fritz 1:

1.Rf6!
-/+ (-0.78) Depth: 13/38 00:00:27 156mN
1.Rf6 Bd7 2.Rxg6 Qh7 3.b5 Kd8 4.Kd2 Qh5 5.Rb1 Bxg5+ 6.Kc2 Ke7
=/+ (-0.56) Depth: 13/38 00:00:34 197mN
1.Rf6 Bd7 2.Rxg6 Qh7 3.b5 Kd8 4.Kd2 Qh5 5.Rb1 Rc8 6.Bxe6 Bxe6
=/+ (-0.53) Depth: 14/39 00:00:53 316mN
1.Rf6 Bxf6 2.exf6 Kd8 3.bxa5 Rxa5 4.Qb1 Kc7 5.Nf2 Bd7 6.Ng4 Rfa8
=/+ (-0.56) Depth: 15/40 00:02:23 890mN
1.Rf6 Bxf6 2.exf6 Kd8 3.bxa5 Rxa5 4.Qb1 Kc7 5.Nf2 Bd7 6.Ng4 Rfa8
=/+ (-0.53) Depth: 16/44 00:05:07 1927mN
1.Rf6 Bxf6 2.exf6 Kd8 3.bxa5 Rxa5 4.Qb1 Kc7 5.Nf2 Bd7 6.Ng4 Rfa8
=/+ (-0.44) Depth: 17/45 00:17:40 6575mN
1.Rf6 Bxf6 2.exf6 Kd8 3.bxa5 Rxa5 4.Qb1 Kc7 5.Nf2 Bd7 6.Ng4 Rfa8
=/+ (-0.50) Depth: 18/47 00:39:10 14604mN
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