MESON Chess Problem Database

Problem Display
PID: 234111 (8/1KR5/7Q/1p1k4/3n4/5N2/2B5/8 w - - 0 1)

Ignatenko, Gennady Petrovich

64 Shakhmatnoe obozrenie, 2021

8/1KR5/7Q/1p1k4/3n4/5N2/2B5/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc2
      • 2.Qc6#
    • 1...Se2
      • 2.Qc6#
    • 1...Sb3
      • 2.Qc6#
    • 1...Sf5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
  • Tries
    • 1.Bb3+?
      • 1...Sxb3
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qf4?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sxf3
        • 2.Bb3#
      • 1...Sc6!
    • 1.Qg5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sf5!
    • 1.Qh5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sf5!
    • 1.Qb6?
      • threat
        • 2.Rc5#
      • 1...Sxc2
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Se6
        • 2.Qc6#
      • 1...Sxf3!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxf3!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qd6#
      • 1...Sxc2
        • 2.Qe6#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sf5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,XB(A)::QAB1(C)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(a);XB(A)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
        • S(a);N_GUARD,XS(B)::B(A)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
        • K(c);S_FLIGHT::QAR1(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
        • K(c);S_FLIGHT::QAR1(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);
      • Threat
        • R1(E)
      • Vars
        • S(a);N_GUARD,XB(A)::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • S(a);XS(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);XS(B)
  • Actual
    • R(E);
    • Threat
      • QAR1(C)
    • Vars
      • S(a);N_GUARD,XB(A)::QAB1(C)
      • S(a);OGATE,XR(E)::QAB1(C),XS(a)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
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