MESON Chess Problem Database

Problem Display
PID: 261939 (8/5N2/3Q4/8/6kp/8/5K2/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Problemnoter, 1965

8/5N2/3Q4/8/6kp/8/5K2/8

#2

3 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qf4+?
      • 1...Kh3
        • 2.Sg5#
      • 1...Kh5
        • 2.Qg5#
        • 2.Qf5#
      • 1...Kxf4!
    • 1.Qe5?
      • 1...h3
        • 2.Qg5#
      • 1...Kh3!
    • 1.Qd3?
      • threat
        • 2.Qf3#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kh5
        • 2.Qf5#
      • 1...h3!
    • 1.Qe6+?
      • 1...Kh5
        • 2.Qf5#
      • 1...Kf4!
    • 1.Qf6?
      • threat
        • 2.Qf3#
      • 1...Kh5
        • 2.Qg5#
        • 2.Qf5#
      • 1...h3
        • 2.Qg5#
      • 1...Kh3!
    • 1.Qg6+?
      • 1...Kh3
        • 2.Qg2#
      • 1...Kf4!
    • 1.Qd7+?
      • 1...Kh5
        • 2.Qf5#
      • 1...Kf4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qf3#
      • 1...Kh3
        • 2.Qg2#
      • 1...Kf4
        • 2.Qf3#
      • 1...h3
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);N_GUARD,S_FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • P(b);SBLOCK::QAR1(B)
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