MESON Chess Problem Database

Problem Display
PID: 89099 (8/4n3/7N/8/3Q4/5kp1/8/4K2R w K - 0 1)

Rice, John Michael

The Problemist, 1991

8/4n3/7N/8/3Q4/5kp1/8/4K2R

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qe4#
    • 1...g2
      • 2.Rh3#
  • Tries
    • 1.Rh4?
      • threat
        • 2.Qe4#
      • 1...g2
        • 2.Rh3#
        • 2.Qf2#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qf4#
      • 1...Kg2!
    • 1.Qe3+?
      • 1...Kg2
        • 2.Qe4#
      • 1...Kxe3!
    • 1.Qd3+?
      • 1...Kg2
        • 2.Qf1#
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qf4+?
      • 1...Kg2
        • 2.Qf1#
        • 2.Qe4#
      • 1...Kxf4!
    • 1.Qg4+?
      • 1...Kg2
        • 2.Qe4#
      • 1...Ke3!
  • Keys
    • 1.Qe5!
      • threat
        • 2.0-0#
      • 1...Kg2
        • 2.Qe4#
      • 1...g2
        • 2.Rh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(C)
    • P(b);OGATEB,SBLOCK::R(B)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • 0-0
    • Vars
      • K(a);S_FLIGHT::QAB(C)
      • P(b);OGATEB,SBLOCK::R(B)
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