MESON Chess Problem Database

Problem Display
PID: 238208 (7q/5Q1p/7k/8/4N2K/8/5n2/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2011

7q/5Q1p/7k/8/4N2K/8/5n2/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6+
      • 2.Qxf6#
    • 1...Qg7
      • 2.Qh5#
    • 1...Qa8
      • 2.Qf6#
    • 1...Qb8
      • 2.Qf6#
    • 1...Qc8
      • 2.Qf6#
  • Tries
    • 1.Qe6+?
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Kg7!
  • Keys
    • 1.Sf6!
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Qg7
        • 2.Qh5#
      • 1...Qa8
        • 2.Qxh7#
      • 1...Qb8
        • 2.Qxh7#
      • 1...Qc8
        • 2.Qxh7#
      • 1...Qd8
        • 2.Qxh7#
      • 1...Qe8
        • 2.Qxh7#
      • 1...Qf8
        • 2.Qxh7#
      • 1...Qg8
        • 2.Sxg8#
      • 1...Sd1
        • 2.Sg4#
      • 1...Sh1
        • 2.Sg4#
      • 1...Sd3
        • 2.Sg4#
      • 1...Sh3
        • 2.Sg4#
      • 1...Se4
        • 2.Sg4#
      • 1...Sg4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • Q(d);CHECK,N_GUARD::QAR2(C),XQ(d)
    • Q(d);SBLOCK::QAR1(C)
    • Q(d);N_GUARD,SBLOCK::QAR2(C)
    • Q(d);N_GUARD::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(d);CHECK,N_GUARD,P_SPINQ(d)::QAR2(C),XQ(d)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(A);
    • Vars
      • Q(d);CHECK,OGATE,XS(A)::QAR2(C),XQ(d)
      • Q(d);SBLOCK::QAR1(C)
      • Q(d);N_GUARD,SBLOCK::QAR1(C),XP(c)
      • Q(d);N_GUARD::QAR1(C),XP(c)
      • Q(d);N_GUARD,P_PINS(A)::QAR1(C),XP(c)
      • Q(d);N_GUARD::S(A),XQ(d)
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
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