MESON Chess Problem Database
Problem Display
PID: 276775 (1b4KN/3p3n/1n2Nk2/2B1R3/6B1/5p2/3Q3q/8 w - - 0 1)
Dragan, Nicholae A
Stella Polaris, 1971
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Kxe5
- 2.Qd4#
- 1...Qg1
- 2.Qf4#
- 1...Qf4
- 2.Qxf4#
- 1...Qxe5
- 2.Qh6#
- 1...Qh1
- 2.Qf4#
- 1...Qe2
- 2.Qf4#
- 1...Qf2
- 2.Qf4#
- 1...Qg2
- 2.Qf4#
- 1...Qh3
- 2.Qf4#
- 1...Qh4
- 2.Qf4#
- 1...Sg5
- 2.Qxg5#
- 1...Sf8
- 2.Qg5#
- 1...dxe6
- 2.Rxe6#
- 1...Kxe5
- Tries
- 1.Sc7?
- threat
- 2.Rf5#
- 2.Qd6#
- 1...Kxe5
- 2.Qd4#
- 1...Qxe5
- 2.Qh6#
- 1...Qxd2
- 2.Rf5#
- 1...Qf4
- 2.Qxf4#
- 2.Qd6#
- 1...Qh5
- 2.Qd6#
- 1...Sc4
- 2.Rf5#
- 1...Sd5
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Sg5
- 2.Rf5#
- 2.Qxg5#
- 1...Sf8
- 2.Rf5#
- 2.Qg5#
- 1...d5
- 2.Rf5#
- 2.Re6#
- 1...d6
- 2.Re6#
- 2.Qxd6#
- 1...Bxc7!
- threat
- 1.Sg7?
- threat
- 2.Rf5#
- 1...Kxe5
- 2.Qd4#
- 1...Qxe5
- 2.Qh6#
- 1...Bxe5
- 2.Se8#
- 1...Qf4
- 2.Qxf4#
- 1...Bd6
- 2.Qxd6#
- 1...d6
- 2.Re6#
- 1...Qh5!
- threat
- 1.Be7+?
- 1...Kxe5
- 2.Qd4#
- 1...Kxe7!
- 1...Kxe5
- 1.Qd6?
- threat
- 2.Sc7#
- 2.Rf5#
- 1...Qxe5
- 2.Qe7#
- 1...dxe6
- 2.Rf5#
- 2.Qxe6#
- 1...Qh5
- 2.Sc7#
- 1...Qf4
- 2.Sc7#
- 1...Qa2
- 2.Rf5#
- 1...Qc2
- 2.Sc7#
- 1...Qd2
- 2.Rf5#
- 1...Bc7
- 2.Sxc7#
- 2.Rf5#
- 1...Sc4
- 2.Rf5#
- 1...Sc8
- 2.Rf5#
- 1...Sg5
- 2.Rf5#
- 1...Sf8
- 2.Rf5#
- 1...Bxd6!
- threat
- 1.Qxd7?
- threat
- 2.Rf5#
- 2.Qg7#
- 1...Kxe5
- 2.Qd4#
- 1...Qxe5
- 2.Be7#
- 2.Qe7#
- 2.Qf7#
- 2.Qg7#
- 2.Qd8#
- 1...Bxe5
- 2.Be7#
- 2.Qe7#
- 2.Qf7#
- 2.Qg7#
- 2.Qd8#
- 1...Qh5
- 2.Qg7#
- 1...Qf4
- 2.Qg7#
- 1...Qc2
- 2.Qg7#
- 1...Qh6
- 2.Rf5#
- 1...Sxd7!
- threat
- 1.Sc7?
- Keys
- 1.Sg5!
- threat
- 2.Rf5#
- 1...Kxe5
- 2.Qd4#
- 1...Qxe5
- 2.Sxh7#
- 1...Bxe5
- 2.Se4#
- 1...Sxg5
- 2.Qxg5#
- 1...Qf4
- 2.Qxf4#
- 1...Bd6
- 2.Qxd6#
- 1...d6
- 2.Re6#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
- Q(a);N_GUARD,P_PINB(B)::QAR2(A)
- Q(a);N_GUARD::QAR2(A),XQ(a)
- Q(a);N_GUARD,SBLOCK,XR(D)::QAR2(A)
- Q(a);N_GUARD::QAR2(A)
- S(f);N_GUARD::QAB1(A),XS(f)
- S(f);N_GUARD::QAB1(A)
- P(e);OGATE,XS(E)::R1(D),XP(e)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
- Q(a);N_GUARD,SBLOCK,XR(D)::QAR2(A)
- Q(a);XQ(A)::R1(D)
- Q(a);::QAR2(A)
- S(c);::R1(D)
- Refutation
- B(g);XS(E)
- Try
- S(E);
- Threat
- R1(D)
- Vars
- K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
- Q(a);N_GUARD,SBLOCK,XR(D)::QAR2(A)
- B(g);SBLOCK,XR(D)::S(E)
- Q(a);N_GUARD::QAR2(A),XQ(a)
- B(g);N_GUARD::QAR2(A),XB(g)
- P(e);N_GUARD::R1(D)
- Refutation
- Q(a);
- Try
- B(C);CHECK
- Vars
- K(d);N_GUARD,S_FLIGHT,XR(D)::QAB1(A)
- Refutation
- K(d);S_FLIGHT,XB(C)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(a);SBLOCK,XR(D)::QAB1(A)
- Q(a);::QAR(A)+S(E)
- Q(a);P_PINS(E)::R1(D)
- Q(a);::R1(D)
- S(c);::R1(D)
- S(f);::R1(D)
- Refutation
- B(g);XQ(A)
- Try
- Q(A);XP(e)
- Threat
- DUALS(2)
- Vars
- K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
- Q(a);::QAB1(A)
- Q(a);::R1(D)
- Refutation
- S(c);XQ(A)
- Try
- Actual
- S(E);
- Threat
- R1(D)
- Vars
- K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
- Q(a);N_GUARD,SBLOCK,XR(D)::S(E),XS(f)
- B(g);SBLOCK,XR(D)::S(E)
- S(f);OGATE,XS(E)::QAB1(A),XS(f)
- Q(a);N_GUARD::QAR2(A),XQ(a)
- B(g);N_GUARD::QAR2(A),XB(g)
- P(e);N_GUARD::R1(D)
Developed and maintained by Brian Stephenson.
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