MESON Chess Problem Database

Problem Display
PID: 148590 (Q7/8/2PP3K/5p2/6k1/8/5B2/4N3 w - - 0 1)

Maximov, Nikolai J

British Chess Magazine, 1901

Q7/8/2PP3K/5p2/6k1/8/5B2/4N3

#2

6 + 2

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qc8#
  • Tries
    • 1.Qa4+?
      • 1...Kh3
        • 2.Qh4#
      • 1...f4!
    • 1.Qa7?
      • 1...Kf4
        • 2.Qd4#
      • 1...f4
        • 2.Qd7#
      • 1...Kh3!
    • 1.Qd8?
      • threat
        • 2.Qh4#
      • 1...Kh3
        • 2.Qh4#
      • 1...f4
        • 2.Qd7#
        • 2.Qc8#
      • 1...Kf4!
    • 1.Qe8?
      • 1...Kh3
        • 2.Qh5#
      • 1...f4
        • 2.Qh5#
        • 2.Qd7#
        • 2.Qe6#
        • 2.Qc8#
      • 1...Kf4!
    • 1.Qg8+?
      • 1...Kh3
        • 2.Qg2#
        • 2.Qg3#
      • 1...Kf4!
    • 1.c7?
      • threat
        • 2.Qf3#
      • 1...Kh3
        • 2.Qg2#
      • 1...f4
        • 2.Qc8#
        • 2.c8Q#
        • 2.c8B#
      • 1...Kf4!
  • Keys
    • 1.Qh8!
      • 1...Kh3
        • 2.Kg5#
      • 1...Kf4
        • 2.Qd4#
      • 1...f4
        • 2.Qc8#

This anticipates 56682(1923)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR(F)+K(E)
      • K(a);P-FLIGHT::QAR2(F)
      • P(b);OGATEB,SBLOCK::QAB(F)
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