MESON Chess Problem Database

Problem Display
PID: 102402 (8/Q7/8/4p3/2p1k3/3RPR2/8/N6K w - - 0 1)

Gantin, B

Europe Echecs, 1988

8/Q7/8/4p3/2p1k3/3RPR2/8/N6K

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxd3
      • 2.Qb7#
      • 2.Qa8#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Qh7#
      • 1...cxd3
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kxd3!
    • 1.Qa4?
      • 1...Kxd3
        • 2.Qc2#
      • 1...Kxf3!
    • 1.Qd7?
      • threat
        • 2.Qf5#
        • 2.Qd5#
      • 1...cxd3
        • 2.Qc6#
        • 2.Qb7#
      • 1...Kxf3!
    • 1.Qf7?
      • threat
        • 2.Qd5#
        • 2.Qf5#
      • 1...cxd3
        • 2.Qb7#
      • 1...Kxd3!
  • Keys
    • 1.Qa2!
      • 1...Kxd3
        • 2.Qc2#
      • 1...Kxf3
        • 2.Qg2#
      • 1...cxd3
        • 2.Qa8#
      • 1...c3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB(F)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(F);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),OGATEB,S_FLIGHT,XR(C)::QAB1(F)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XR(E)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);SBLOCK,XR(C)::QAB(F)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • Q(F);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(F)
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(F)
      • P(a);SBLOCK,XR(C)::QAB(F)
      • P(a);OGATE::QAB1(F)
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