MESON Chess Problem Database

Problem Display
PID: 24759 (4k1K1/2P4Q/3n4/8/2n5/B7/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

4k1K1/2P4Q/3n4/8/2n5/B7/8/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Qe7#
      • 2.Qf7#
      • 2.c8Q#
      • 2.c8R#
    • 1...Sb5
      • 2.Qe7#
      • 2.Qf7#
      • 2.c8Q#
      • 2.c8R#
    • 1...Sf5
      • 2.Qf7#
      • 2.c8Q#
      • 2.c8R#
    • 1...Sb7
      • 2.Qe7#
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...Sc8
      • 2.Qf7#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sd2
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sb2
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sa3
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Se3
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sa5
        • 2.Qe7#
        • 2.Qf7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Se5
        • 2.Qe7#
        • 2.c8Q#
        • 2.c8R#
      • 1...Sb6
        • 2.Qe7#
        • 2.Qf7#
      • 1...Sxd6!
    • 1.Qg6+?
      • 1...Ke7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
        • 2.Qc6#
        • 2.Qe6#
        • 2.c8Q#
      • 1...Kd7!
    • 1.Qh3?
      • threat
        • 2.Qe6#
      • 1...Sf5
        • 2.c8Q#
      • 1...Sc8
        • 2.Qxc8#
      • 1...Ke7!
    • 1.Qh4?
      • threat
        • 2.Qd8#
      • 1...Sb7
        • 2.Qe7#
      • 1...Sf7
        • 2.Qe7#
      • 1...Kd7!
    • 1.Qh5+?
      • 1...Ke7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
        • 2.Qb5#
        • 2.c8Q#
      • 1...Kd7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe6#
      • 1...Ke7
        • 2.Qf7#
      • 1...Sxf5
        • 2.c8Q#
      • 1...Sc8
        • 2.Qxc8#
        • 2.Qb5#
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(b);N_GUARD::QAB1(C)
  • Tries
    • Try
      • B(A);XS(b)
      • Threat
        • DUALS(4)
      • Refutation
        • S(a);XB(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • S(b);N_GUARD::P=Q
        • S(b);N_GUARD::QAR2(C),XS(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(b)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::QAR1(C)
      • S(b);N_GUARD,XQ(C)::P=Q
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