MESON Chess Problem Database

Problem Display
PID: 279907 (7Q/8/8/8/3Nk3/5N2/5K2/8 w - - 0 1)

Matrenin, Mikhail Vasilevich

Kudesnik, 2006

7Q/8/8/8/3Nk3/5N2/5K2/8

#2

4 + 1

3713 Snap 2024
6490 yacpdb 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qh4#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Qh4#
      • 1...Kd5!
    • 1.Qf6?
      • threat
        • 2.Qf5#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kd3!
    • 1.Qh5?
      • threat
        • 2.Qf5#
      • 1...Kf4
        • 2.Qh4#
        • 2.Qf5#
      • 1...Kd3!
    • 1.Qh6?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kd3!
    • 1.Qh7+?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qh4#
      • 1...Kd5!
    • 1.Qd8?
      • 1...Kf4
        • 2.Qh4#
      • 1...Kd3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qc6#

Anticipated by 15493(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,P-FLIGHT::QAR2(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
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