MESON Chess Problem Database

Problem Display
PID: 42956 (7n/3K1p2/2Q5/3R4/4k3/2P3P1/3p2P1/8 w - - 0 1)

Shanahan, Ian

The Problemist, 2002

7n/3K1p2/2Q5/3R4/4k3/2P3P1/3p2P1/8

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Ra5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd3!
    • 1.Rb5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd3!
    • 1.Rc5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd3!
    • 1.Rg5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd3!
    • 1.Rh5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kd3!
    • 1.Rd6+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Ke3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qf3#
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxd5
        • 2.Qd4#
      • 1...d1Q
        • 2.Qe5#
      • 1...d1B
        • 2.Qd4#
        • 2.Qe5#
      • 1...d1R
        • 2.Qe5#
        • 2.Qf3#
      • 1...Sg6
        • 2.Qd4#
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(c);N_GUARD::QAR2(E)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(D)::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);P-FLIGHT::QAR1(E)
      • K(b);S_FLIGHT,XR(D)::QAR1(E)
      • P(a);P_PINR(D)::QAR1(E)
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