MESON Chess Problem Database

Problem Display
PID: 142583 (8/K4N2/2Q5/1Pp5/2k5/P7/R4N2/8 w - - 0 1)

Jawahar, A

Phenix, 1990

8/K4N2/2Q5/1Pp5/2k5/P7/R4N2/8

#2

7 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rc2+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qxc5#
      • 1...Kb3!
    • 1.Qf3?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxb5!
    • 1.Qe4+?
      • 1...Kb3
        • 2.Qc2#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kxb5!
    • 1.Qd7?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kb3!
    • 1.Qxc5+?
      • 1...Kb3
        • 2.Qc2#
      • 1...Kxc5!
    • 1.Qd6?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kb3!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qd3#
      • 1...Kb3
        • 2.Qc2#
      • 1...Kc3
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XP(D)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);N_PINP(b)
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);OGATEB,S_FLIGHT,XP(D)::QAB1(E)
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