MESON Chess Problem Database

Problem Display
PID: 95042 (4B3/5p2/8/4RNR1/5k2/5P2/2K5/1Q6 w - - 0 1)

Shamrin, Aleksandr Petrovich

Cherkasskaya Pravda, 1981

4B3/5p2/8/4RNR1/5k2/5P2/2K5/1Q6

#2

7 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Qf1#
  • Tries
    • 1.Qc1+?
      • 1...Kxf3
        • 2.Qe3#
        • 2.Qf1#
      • 1...Kxe5!
    • 1.Qe1?
      • threat
        • 2.Qg3#
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qg3#
        • 2.Qf1#
        • 2.Qe3#
      • 1...Kxg5!
    • 1.Qg1?
      • threat
        • 2.Qe3#
        • 2.Qg3#
      • 1...Kxf3
        • 2.Qe3#
        • 2.Qf1#
        • 2.Qg3#
      • 1...Kxe5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qe3#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Kxg5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • K(a);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
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