MESON Chess Problem Database

Problem Display
PID: 196661 (8/8/4N3/4Q3/4p1pk/7P/8/7K w - - 0 1)

Krivenko, Valery Aleksinovich

Suomen Shakki, 1985

8/8/4N3/4Q3/4p1pk/7P/8/7K

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qh2#
    • 1...gxh3
      • 2.Qg5#
    • 1...g3
      • 2.Qh8#
  • Tries
    • 1.Kg1?
      • 1...Kxh3
        • 2.Qh2#
      • 1...gxh3
        • 2.Qg5#
      • 1...g3
        • 2.Qh8#
      • 1...e3!
    • 1.Kh2?
      • threat
        • 2.Qh8#
        • 2.Qg5#
      • 1...gxh3
        • 2.Qg5#
      • 1...g3+!
    • 1.Sg7?
      • 1...Kxh3
        • 2.Qh2#
      • 1...gxh3
        • 2.Qf4#
      • 1...g3
        • 2.Qh5#
      • 1...e3!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qxg4#
      • 1...Kxh3
        • 2.Qh2#
      • 1...Kh5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(c);OGATEB,P-FLIGHT,XP(B)::QAR1(C)
    • P(b);SBLOCK,XP(B)::QAB1(C)
    • P(b);SBLOCK::QAR(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR1(C)
        • P(b);SBLOCK,XP(B)::QAB1(C)
        • P(b);SBLOCK::QAR(C)
      • Refutation
        • P(a);
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(B)::QAB1(C)
      • Refutation
        • P(b);CHECK
    • Try
      • S(D);
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR1(C)
        • P(b);OGATEB,SBLOCK,XP(B)::QAR2(C)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);P_PINP(b)
    • Threat
      • QAR1(C),XP(b)
    • Vars
      • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XP(B)::QAR1(C)
      • K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
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