MESON Chess Problem Database

Problem Display
PID: 11640 (8/7Q/8/8/N7/3p4/2B5/2k1NK2 w - - 0 1)

Karpov, Valery N

4th Prize, Platov MT, 1970

8/7Q/8/8/N7/3p4/2B5/2k1NK2

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qh6#
    • 1...dxc2
      • 2.Qxc2#
  • Tries
    • 1.Kf2?
      • 1...Kd2
        • 2.Qh6#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2!
    • 1.Bb3?
      • 1...Kd2
        • 2.Qh6#
      • 1...d2
        • 2.Qc2#
      • 1...Kb1!
    • 1.Qe4?
      • 1...Kd2
        • 2.Qf4#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2!
    • 1.Qf5?
      • 1...Kd2
        • 2.Qf4#
        • 2.Qg5#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2!
    • 1.Qg6?
      • 1...Kd2
        • 2.Qg5#
        • 2.Qh6#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2!
    • 1.Qh2?
      • threat
        • 2.Sxd3#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2!
    • 1.Qh3?
      • 1...Kd2
        • 2.Qh6#
      • 1...d2
        • 2.Qa3#
      • 1...dxc2!
    • 1.Qh5?
      • threat
        • 2.Qd1#
      • 1...Kd2
        • 2.Qg5#
        • 2.Qh6#
      • 1...dxc2!
    • 1.Qe7?
      • 1...Kd2
        • 2.Qg5#
      • 1...d2
        • 2.Qa3#
      • 1...dxc2!
    • 1.Qg7?
      • 1...Kd2
        • 2.Qh6#
        • 2.Qg5#
      • 1...d2
        • 2.Qa1#
        • 2.Qb2#
      • 1...dxc2!
    • 1.Qh8?
      • 1...Kd2
        • 2.Qh6#
      • 1...d2
        • 2.Qa1#
        • 2.Qb2#
      • 1...dxc2!
  • Keys
    • 1.Qc7!
      • 1...Kd2
        • 2.Qf4#
      • 1...dxc2
        • 2.Qxc2#
      • 1...d2
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(E)
    • P(b);OGATE,XB(C)::QAR1(E),XP(b)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);OGATE,XB(C)::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);OGATE::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);OGATE,XB(C)::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,XB(C)::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,XB(C)::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • S(A),XP(b)
      • Vars
        • P(b);OGATE,XB(C)::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);OGATE,SBLOCK::QAB(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);SBLOCK::QAB(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(E);
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • P(b);XB(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E)
      • P(b);OGATE,P_SPINP(b),XB(C)::QAR1(E),XP(b)
      • P(b);SBLOCK::S(A)
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