MESON Chess Problem Database

Problem Display
PID: 246073 (6k1/8/1K2PQ2/2B3pq/8/8/8/8 w - - 0 1)

Zinoviev, Nikolai

Problemist Pribuzhya, 1990

6k1/8/1K2PQ2/2B3pq/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Qf8#
    • 1...Qh8
      • 2.Qf7#
  • Tries
    • 1.Qg6+?
      • 1...Kh8
        • 2.Bd4#
      • 1...Qxg6!
    • 1.Qf7+?
      • 1...Kh8
        • 2.Bd4#
      • 1...Qxf7!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qg7#
      • 1...Kh7
        • 2.Qg7#
      • 1...Qf7
        • 2.Qh8#
        • 2.Qxf7#
      • 1...Qg6
        • 2.Qh8#
      • 1...Qh6
        • 2.Qf7#
      • 1...Qh7
        • 2.Qd8#
      • 1...Qh8
        • 2.Qxh8#
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::QAR1(D)
    • Q(b);N_GUARD,SBLOCK::QAB1(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::B(A)
      • Refutation
        • Q(b);P_PINP(C),XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::B(A)
      • Refutation
        • Q(b);XQ(D)
  • Actual
    • B(A);
    • Threat
      • QAR1(D)
    • Vars
      • K(c);S_FLIGHT::QAR1(D)
      • Q(b);N_GUARD::QAR1(D)
      • Q(b);N_GUARD::QAB1(D)
      • Q(b);N_GUARD,SBLOCK::QAR(D)
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