MESON Chess Problem Database

Problem Display
PID: 172392 (4k1q1/4BR2/1K1Q4/7P/8/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

4k1q1/4BR2/1K1Q4/7P/8/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7
      • 2.Qd8#
    • 1...Qh7
      • 2.Rf8#
    • 1...Qg2
      • 2.Rf8#
    • 1...Qg3
      • 2.Rf8#
    • 1...Qg4
      • 2.Rf8#
    • 1...Qg5
      • 2.Rf8#
    • 1...Qg6
      • 2.Rf8#
    • 1...Qf8
      • 2.Rxf8#
  • Tries
    • 1.Bh4?
      • threat
        • 2.Qe7#
        • 2.Qe6#
        • 2.Qd7#
      • 1...Kxf7
        • 2.Qe7#
      • 1...Qxf7
        • 2.Qd8#
      • 1...Qg4
        • 2.Rf8#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Qg5
        • 2.Rf8#
        • 2.Qf8#
        • 2.Qd7#
      • 1...Qg6
        • 2.Rf8#
      • 1...Qf8
        • 2.Rxf8#
        • 2.Qxf8#
        • 2.Qd7#
      • 1...Qg1+!
    • 1.Bf6?
      • threat
        • 2.Qe7#
        • 2.Qe6#
        • 2.Qd7#
      • 1...Kxf7
        • 2.Qe7#
      • 1...Qxf7
        • 2.Qd8#
      • 1...Qg4
        • 2.Rf8#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Qf8
        • 2.Rxf8#
        • 2.Qxf8#
        • 2.Qd7#
      • 1...Qg1+!
    • 1.Rf2?
      • threat
        • 2.Qd8#
      • 1...Qd5
        • 2.Rf8#
      • 1...Qe6
        • 2.Rf8#
      • 1...Qg6
        • 2.Rf8#
      • 1...Qb3+!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Qe7#
        • 2.Qe6#
        • 2.Qd7#
      • 1...Kxf7
        • 2.Qe7#
      • 1...Qxf7
        • 2.Qd8#
      • 1...Qxg5
        • 2.Rf8#
        • 2.Qf8#
        • 2.Qd7#
      • 1...Qg6
        • 2.Rf8#
      • 1...Qf8
        • 2.Rxf8#
        • 2.Qxf8#
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);SBLOCK,XR(E)::QAR1(C)
    • Q(b);N_GUARD::R1(E)
    • Q(b);N_GUARD,P_PINQ(C)::R1(E)
    • Q(b);N_GUARD::R1(E),XQ(b)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);S_FLIGHT,XR(E)::QAR1(C)
        • Q(b);SBLOCK,XR(E)::QAR1(C)
        • Q(b);N_GUARD,P_PINQ(C)::R1(E)
      • Refutation
        • Q(b);CHECK
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);S_FLIGHT,XR(E)::QAR1(C)
        • Q(b);SBLOCK,XR(E)::QAR1(C)
      • Refutation
        • Q(b);CHECK
    • Try
      • R(E);
      • Threat
        • QAR1(C)
      • Vars
        • Q(b);N_GUARD::R1(E)
        • Q(b);N_GUARD,P_PINQ(C)::R1(E)
      • Refutation
        • Q(b);CHECK
  • Actual
    • B(D);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);S_FLIGHT,XR(E)::QAR1(C)
      • Q(b);SBLOCK,XR(E)::QAR1(C)
      • Q(b);N_GUARD,P_PINQ(C)::R1(E)
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