MESON Chess Problem Database
Problem Display
PID: 179469 (8/1P1N4/5b1Q/p5rr/PknBR3/8/K3b3/2RB4 w - - 0 1)
Davidenko, Fedor Vasilevich
Sahs (Latvia), 1977
#2
9 + 7
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Bc3#
- 1...Be5
- 2.Bc5#
- 1...Be7
- 2.Bc3#
- 1...Bd8
- 2.Bc3#
- 1...Sb2
- 2.Bc3#
- 2.Bc5#
- 1...Sd2
- 2.Bc3#
- 2.Bc5#
- 1...Sa3
- 2.Bc3#
- 2.Bc5#
- 1...Se3
- 2.Bc3#
- 2.Bc5#
- 1...Se5
- 2.Bc3#
- 2.Bc5#
- 1...Sb6
- 2.Bc3#
- 2.Bc5#
- 1...Sd6
- 2.Bc3#
- 2.Bc5#
- 1...Re5
- Tries
- 1.Sb8?
- threat
- 2.Sa6#
- 2.Sc6#
- 1...Bxd4
- 2.Sa6#
- 1...Rc5
- 2.Sa6#
- 1...Sb2
- 2.Sc6#
- 2.Bc5#
- 1...Sd2
- 2.Sc6#
- 2.Bc5#
- 1...Sa3
- 2.Sc6#
- 2.Bc5#
- 1...Se3
- 2.Sc6#
- 2.Bc5#
- 1...Se5
- 2.Bc5#
- 1...Sb6
- 2.Sc6#
- 2.Bc5#
- 1...Sd6
- 2.Sc6#
- 2.Bc5#
- 1...Bxd1!
- threat
- 1.Re5?
- threat
- 2.Bc3#
- 2.Bc5#
- 1...Rxe5
- 2.Bc3#
- 1...Bxe5
- 2.Bc5#
- 1...Sxe5
- 2.Bc5#
- 1...Rg3
- 2.Bc5#
- 1...Rh3
- 2.Bc5#
- 1...Be7
- 2.Bc3#
- 1...Sb2
- 2.Bc5#
- 1...Sd2
- 2.Bc5#
- 1...Sa3
- 2.Bc5#
- 1...Se3
- 2.Bc5#
- 1...Sb6
- 2.Bc5#
- 1...Sd6
- 2.Bc5#
- 1...Bxd1!
- threat
- 1.Qf8+?
- 1...Be7
- 2.Bc3#
- 1...Sd6
- 2.Bc3#
- 2.Bc5#
- 1...Rc5!
- 1...Be7
- 1.b8Q+?
- 1...Sb6
- 2.Bc3#
- 2.Bc5#
- 1...Rb5!
- 1...Sb6
- 1.b8S?
- threat
- 2.Sa6#
- 2.Sc6#
- 1...Rc5
- 2.Sa6#
- 1...Sb2
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Sd2
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Sa3
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Se3
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Se5
- 2.Bc3#
- 2.Bc5#
- 1...Sb6
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Sd6
- 2.Sc6#
- 2.Bc3#
- 2.Bc5#
- 1...Bxd1!
- threat
- 1.b8R+?
- 1...Sb6
- 2.Bc3#
- 2.Bc5#
- 1...Rb5!
- 1...Sb6
- 1.Sb8?
- Keys
- 1.Be5!
- threat
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Rxe5
- 2.Qd2#
- 1...Rxh6
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Bxd1
- 2.Rcxc4#
- 2.Rexc4#
- 1...Bxe5
- 2.Qb6#
- 1...Rg1
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rg2
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rg3
- 2.b8Q#
- 2.b8R#
- 1...Rg4
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rf5
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rg6
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rg7
- 2.Rb1#
- 2.Qd2#
- 2.b8Q#
- 2.b8R#
- 1...Rg8
- 2.Rb1#
- 2.Qd2#
- 1...Rh1
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Rh2
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Rh3
- 2.b8Q#
- 2.b8R#
- 1...Rh4
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Bf1
- 2.Rb1#
- 2.b8Q#
- 2.b8R#
- 1...Bd3
- 2.b8Q#
- 2.b8R#
- 1...Bf3
- 2.Rb1#
- 2.Rcxc4#
- 2.Rexc4#
- 2.b8Q#
- 2.b8R#
- 1...Bg4
- 2.Rb1#
- 2.Rcxc4#
- 2.Rexc4#
- 2.b8Q#
- 2.b8R#
- 1...Be7
- 2.Bc3#
- 2.Rb1#
- 2.Qb6#
- 2.b8Q#
- 2.b8R#
- 1...Bg7
- 2.Rb1#
- 2.Qb6#
- 2.Qd6#
- 2.b8Q#
- 2.b8R#
- 1...Bd8
- 2.Bc3#
- 2.Rb1#
- 2.Qd6#
- 1...Bh8
- 2.Rb1#
- 2.Qf8#
- 2.Qb6#
- 2.Qd6#
- 2.b8Q#
- 2.b8R#
- threat
- 1.Be5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(e);S_CUTB(g)::B(E)
- B(g);S_CUTR(e)::B(E)
- B(g);N_GUARD::B(E)
- Tries
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- B(g);XB(E)::S(I)
- R(e);::S(I)
- S(c);::R(F)+B(E),DCHECK
- Refutation
- B(a);XB(B)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(e);XR(F)::B(E)
- B(g);XR(F)::B(E)
- S(c);XR(F)::B(E)
- R(e);::B(E)
- R(f);::B(E)
- B(g);::B(E)
- S(c);::B(E)
- Refutation
- B(a);XB(B)
- Try
- Q(G);CHECK
- Vars
- B(g);P_SPINB(g)::B(E)
- Refutation
- R(e);P_SPINR(e)
- Try
- P(H);CHECK
- Refutation
- R(e);P_SPINR(e)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- R(e);::S(H)
- Refutation
- B(a);XB(B)
- Try
- P(H);CHECK
- Refutation
- R(e);P_SPINR(e)
- Try
- Actual
- B(E);P_PINS(c)
- Threat
- DUALS(3)
- Vars
- R(e);OGATE,XB(E)::QAB(G)
- B(g);OGATE,XB(E)::QAR2(G)
- R(e);::P=Q
- R(f);::P=Q
- B(a);::P=Q
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