MESON Chess Problem Database

Problem Display
PID: 264636 (3Q4/B7/4B1p1/8/8/5N2/4k3/1K6 w - - 0 1)

Chernikh, Vassily

Zadachi i Etyudi, 2009

3Q4/B7/4B1p1/8/8/5N2/4k3/1K6

#2

5 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Qh4?
      • 1...Kd1
        • 2.Qe1#
      • 1...Kf1
        • 2.Qf2#
      • 1...Kd3
        • 2.Qc4#
      • 1...Kxf3
        • 2.Qg4#
      • 1...g5!
    • 1.Qd2+?
      • 1...Kf1
        • 2.Sh2#
        • 2.Bh3#
        • 2.Bc4#
        • 2.Qf2#
      • 1...Kxf3!
    • 1.Qd4?
      • 1...Kf1
        • 2.Qf2#
      • 1...Kxf3
        • 2.Qg4#
      • 1...g5!
  • Keys
    • 1.Qg5!
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1
        • 2.Bc4#
      • 1...Kd3
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qg4#

This anticipates 263112(2020)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(E)
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • Refutation
        • P(b);
  • Actual
    • Q(E);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(E)
      • K(a);N_GUARD,S_FLIGHT::B(C)
      • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(E)
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