MESON Chess Problem Database

Problem Display
PID: 209842 (8/8/8/8/8/6Q1/3KB1PP/6kq w - - 0 1)

Chernyavsky, Mykola Vasilovich

Land og Folk, 1975

8/8/8/8/8/6Q1/3KB1PP/6kq

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1+?
      • 1...Kxg2
        • 2.Qg3#
      • 1...Kxh2!
    • 1.Qf4?
      • 1...Kxg2
        • 2.Qg3#
      • 1...Qxh2
        • 2.Qf1#
      • 1...Qxg2!
    • 1.Qe3+?
      • 1...Kxg2
        • 2.Qg3#
      • 1...Kxh2!
  • Keys
    • 1.Bf3!
      • 1...Qxg2+
        • 2.Qxg2#
      • 1...Kf1
        • 2.Qe1#
      • 1...Qxh2
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(E)
        • Q(b);SBLOCK,XP(D)::QAR1(E)
      • Refutation
        • Q(b);P_PINB(B),XP(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
  • Actual
    • B(B);
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::QAR1(E),XQ(b)
      • K(a);P-FLIGHT::QAR1(E)
      • Q(b);P_PINP(C),SBLOCK,XP(D)::QAR2(E)
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