MESON Chess Problem Database

Problem Display
PID: 238201 (7q/5Q2/5p1k/7N/7K/8/8/5R2 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2011

7q/5Q2/5p1k/7N/7K/8/8/5R2

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Qxg7#
    • 1...Qa8
      • 2.Rxf6#
      • 2.Qg7#
    • 1...Qb8
      • 2.Rxf6#
      • 2.Qg7#
    • 1...Qc8
      • 2.Rxf6#
      • 2.Qg7#
    • 1...Qd8
      • 2.Qg7#
    • 1...Qe8
      • 2.Rxf6#
      • 2.Qg7#
    • 1...Qf8
      • 2.Rxf6#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Sf5#
      • 1...Qg7
        • 2.Qh5#
      • 1...Qc8
        • 2.Rxf6#
      • 1...f5
        • 2.Sxf5#
      • 1...Qh7!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sg4#
      • 1...Qxf6+
        • 2.Rxf6#
      • 1...Qg7
        • 2.Qh5#
      • 1...Qc8
        • 2.Qh7#
      • 1...Qd8
        • 2.Qh7#
      • 1...Qg8
        • 2.Sxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::QAB1(D),XQ(c)
    • Q(c);N_GUARD::QAB1(D)
    • Q(c);N_GUARD::R(A),XP(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • Q(c);SBLOCK::QAR1(D)
        • Q(c);N_GUARD::R(A),XP(a)
        • P(a);::S(C),XP(a)
      • Refutation
        • Q(c);
  • Actual
    • S(C);XP(a)
    • Threat
      • S(C)
    • Vars
      • Q(c);CHECK,OGATE,XS(C)::R(A),XQ(c)
      • Q(c);SBLOCK::QAR1(D)
      • Q(c);N_GUARD::QAR1(D)
      • Q(c);N_GUARD,P_PINS(C)::QAR1(D)
      • Q(c);N_GUARD::S(C),XQ(c)
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