MESON Chess Problem Database

Problem Display
PID: 238211 (8/2K5/3B4/kpN5/N7/8/7Q/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2011

8/2K5/3B4/kpN5/N7/8/7Q/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • 1...bxa4
        • 2.Qd2#
      • 1...b4
        • 2.Bc7#
      • 1...Kb4!
    • 1.Sc3?
      • 1...b4
        • 2.Qa2#
      • 1...Kb4!
    • 1.Sb3+?
      • 1...Kxa4
        • 2.Qa2#
      • 1...Ka6!
    • 1.Sb7+?
      • 1...Kxa4
        • 2.Qa2#
        • 2.Qc2#
      • 1...Ka6!
    • 1.Qf4?
      • 1...bxa4
        • 2.Qxa4#
      • 1...b4!
    • 1.Qb2?
      • 1...bxa4
        • 2.Qb6#
      • 1...b4!
    • 1.Qc2?
      • 1...Kb4
        • 2.Sb7#
        • 2.Qc3#
      • 1...bxa4
        • 2.Qxa4#
      • 1...b4!
    • 1.Qe2?
      • 1...bxa4
        • 2.Sb7#
      • 1...b4
        • 2.Qa6#
      • 1...Kb4!
    • 1.Qh4?
      • 1...bxa4
        • 2.Qxa4#
      • 1...b4!
  • Keys
    • 1.Qa2!
      • 1...Kb4
        • 2.Sb7#
      • 1...bxa4
        • 2.Qxa4#
      • 1...b4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);N_GUARD,XS(B)::QAB(A)
        • P(b);SBLOCK::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);OGATE,XS(B)::QAR1(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATE,XS(B)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);OGATE,XS(B)::QAR1(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XS(B)::S(C)
        • P(b);OGATE,SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);OGATE,XS(B)::QAR1(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(D)+S(C)
      • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(A),XP(b)
      • P(b);SBLOCK::QAR(A)+S(B)
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