MESON Chess Problem Database

Problem Display
PID: 238206 (5K2/8/4B1pk/7q/8/6Q1/7R/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2011

5K2/8/4B1pk/7q/8/6Q1/7R/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Rxh3#
    • 1...Qh4
      • 2.Rxh4#
      • 2.Qxh4#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Qxg6#
      • 1...g5
        • 2.Rxh5#
      • 1...Kh7!
    • 1.Bg8?
      • 1...Qh3
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...g5
        • 2.Qd6#
      • 1...Qxh2!
    • 1.Rxh5+?
      • 1...gxh5
        • 2.Qg7#
      • 1...Kxh5!
    • 1.Qe5?
      • 1...Kh7
        • 2.Qg7#
      • 1...g5
        • 2.Qg7#
      • 1...Qh3
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qxh2!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Qxg6#
      • 1...Kh7
        • 2.Rxh5#
      • 1...gxf5
        • 2.Qg7#
      • 1...g5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATEB::R(A),XQ(a)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • P(b);N_GUARD::R1(A),XQ(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(C);
      • Vars
        • Q(a);OGATEB::R(A),XQ(a)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
    • Try
      • R(A);CHECK,XQ(a)
      • Vars
        • P(b);OGATE,SBLOCK,XR(A)::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT,XR(A)
    • Try
      • Q(B);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
  • Actual
    • B(C);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b)::R(A),XQ(a)
      • P(b);OGATE,XB(C)::QAB1(B)
      • P(b);OGATEB,SBLOCK::QAR(B)
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