MESON Chess Problem Database

Problem Display
PID: 157654 (8/3q4/8/8/1N1R4/k1N5/2P5/K7 w - - 0 1)

Murashev, Pavel Aleksandrovich

Kudesnik, 2007

8/3q4/8/8/1N1R4/k1N5/2P5/K7

#2

5 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Sb1#
  • Tries
    • 1.Sba2?
      • threat
        • 2.Sb1#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qb7
        • 2.Ra4#
      • 1...Qxd4!
    • 1.Sd3?
      • threat
        • 2.Sb1#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qb7
        • 2.Ra4#
      • 1...Qxd4!
    • 1.Sa6?
      • threat
        • 2.Sb1#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qb7
        • 2.Ra4#
      • 1...Qxd4!
    • 1.Sc6?
      • threat
        • 2.Sb1#
        • 2.Sb5#
        • 2.Ra4#
      • 1...Qxc6
        • 2.Sb1#
      • 1...Qg4
        • 2.Sb1#
        • 2.Sb5#
      • 1...Qf5
        • 2.Sb1#
        • 2.Ra4#
      • 1...Qd5
        • 2.Sb1#
        • 2.Ra4#
      • 1...Qa7
        • 2.Sb1#
        • 2.Sb5#
      • 1...Qb7
        • 2.Ra4#
      • 1...Qxd4!
  • Keys
    • 1.Sbd5!
      • threat
        • 2.Sb1#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qb7
        • 2.Ra4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::S(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(C)
      • Vars
        • Q(b);N_GUARD::S(C),XQ(b)
        • Q(b);N_GUARD::R1(E)
      • Refutation
        • Q(b);P_PINS(C),XR(E)
    • Try
      • S(D);
      • Threat
        • S(C)
      • Vars
        • Q(b);N_GUARD::S(C),XQ(b)
        • Q(b);N_GUARD::R1(E)
      • Refutation
        • Q(b);P_PINS(C),XR(E)
    • Try
      • S(D);
      • Threat
        • S(C)
      • Vars
        • Q(b);N_GUARD::S(C),XQ(b)
        • Q(b);N_GUARD::R1(E)
      • Refutation
        • Q(b);P_PINS(C),XR(E)
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);XS(D)::S(C)
        • Q(b);::R1(E)
      • Refutation
        • Q(b);P_PINS(C),XR(E)
  • Actual
    • S(D);
    • Threat
      • S(C)
    • Vars
      • Q(b);N_GUARD::S(C),XQ(b)
      • Q(b);N_GUARD::R1(E)
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