MESON Chess Problem Database

Problem Display
PID: 164655 (8/KPkn4/8/7B/3QP3/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/KPkn4/8/7B/3QP3/8/8/8

#2

5 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qd6+?
      • 1...Kd8
        • 2.b8Q#
        • 2.b8R#
      • 1...Kxd6!
    • 1.b8Q+?
      • 1...Kc6
        • 2.Qd5#
        • 2.Qdd6#
        • 2.Qb7#
      • 1...Sxb8!
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxd7#
      • 1...Kc6
        • 2.Qb6#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Sc5
        • 2.b8Q#
      • 1...Se5
        • 2.Qb6#
        • 2.b8Q#
      • 1...Sb6
        • 2.Qxb6#
        • 2.b8Q#
      • 1...Sf6
        • 2.Qb6#
        • 2.b8Q#
      • 1...Sb8
        • 2.Qb6#
      • 1...Sf8
        • 2.Qb6#
        • 2.b8Q#

FEATURES

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