MESON Chess Problem Database

Problem Display
PID: 86559 (8/8/4p3/6P1/4k3/6Q1/B3N3/K7 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Shak-M, 1989

8/8/4p3/6P1/4k3/6Q1/B3N3/K7

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Bb1#
  • Tries
    • 1.Kb2?
      • 1...Kf5
        • 2.Bb1#
      • 1...e5!
    • 1.Sc3+?
      • 1...Kf5
        • 2.Bb1#
      • 1...Kd4!
    • 1.Bb3?
      • 1...Kf5
        • 2.Bc2#
      • 1...e5!
    • 1.Qb3?
      • 1...Ke5
        • 2.Qxe6#
      • 1...e5
        • 2.Bb1#
      • 1...Kf5!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxf3!
    • 1.Qh3?
      • 1...Ke5
        • 2.Qxe6#
      • 1...e5!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qf4#
      • 1...Kf5
        • 2.Bd3#
      • 1...e5
        • 2.Qd3#

FEATURES

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