MESON Chess Problem Database

Problem Display
PID: 252580 (Q7/8/7B/8/4K3/2p5/8/2Nk4 w - - 0 1)

Ignatenko, Gennady Petrovich

64 Shakhmatnoe obozrenie, 2021

Q7/8/7B/8/4K3/2p5/8/2Nk4

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5+?
      • 1...Kc2
        • 2.Qb3#
      • 1...Ke1!
    • 1.Qa2?
      • threat
        • 2.Qe2#
      • 1...Ke1
        • 2.Qe2#
      • 1...c2!
    • 1.Qa6?
      • threat
        • 2.Qe2#
      • 1...Ke1
        • 2.Qe2#
      • 1...Kc2!
    • 1.Qa7?
      • 1...Ke1
        • 2.Qg1#
      • 1...c2
        • 2.Qg1#
      • 1...Kc2!
  • Keys
    • 1.Qg8!
      • 1...Ke1
        • 2.Qg1#
      • 1...Kc2
        • 2.Qb3#
      • 1...c2
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(D)
        • P(b);SBLOCK::QAR(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR2(D)
      • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(D)
      • P(b);SBLOCK::QAR(D)
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