MESON Chess Problem Database

Problem Display
PID: 220419 (8/6Q1/7N/B7/7p/4k3/3N4/3K4 w - - 0 1)

Krivenko, Valery Aleksinovich

Suomen Shakki, 1980

8/6Q1/7N/B7/7p/4k3/3N4/3K4

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf2
      • 2.Bb6#
    • 1...Kd3
      • 2.Qc3#
  • Tries
    • 1.Sg4+?
      • 1...Kd3
        • 2.Qc3#
        • 2.Qd7#
      • 1...Kf4!
    • 1.Sf5+?
      • 1...Kf2
        • 2.Bb6#
      • 1...Kd3
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qd7#
      • 1...Kf4!
    • 1.Sf7?
      • 1...Kf2
        • 2.Bb6#
      • 1...Kd3
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg5#
      • 1...h3!
    • 1.Bb6+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf4!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Qc3#
        • 2.Qe4#
      • 1...Kf2!
    • 1.Qf6?
      • 1...Kd3
        • 2.Qc3#
      • 1...h3!
    • 1.Qg1+?
      • 1...Kf4
        • 2.Bc7#
      • 1...Kd3!
    • 1.Qg4?
      • 1...Kf2
        • 2.Bb6#
      • 1...Kd3
        • 2.Qe4#
      • 1...h3!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qd4#
      • 1...Kf2
        • 2.Bd4#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(C)
    • K(a);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::B(C)
        • K(a);P-FLIGHT::QAR1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(C)
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • P(b);
  • Actual
    • B(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT::B(C)
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB1(E)
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