MESON Chess Problem Database

Problem Display
PID: 124484 (8/8/1R6/1K1kn3/8/7Q/2N1P3/8 w - - 0 1)

Zhezherun, Bogdan Valeriovich

Kudesnik, 1991

8/8/1R6/1K1kn3/8/7Q/2N1P3/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qe6#
    • 1...Sf3
      • 2.Qe6#
    • 1...Sc4
      • 2.Qe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
  • Tries
    • 1.Rd6+?
      • 1...Ke4
        • 2.Rd4#
      • 1...Kxd6!
    • 1.Qe3?
      • threat
        • 2.Sb4#
        • 2.Qd4#
      • 1...Sf3
        • 2.Sb4#
        • 2.Qe6#
      • 1...Sd3
        • 2.Qd4#
        • 2.Qe6#
      • 1...Sc6!
  • Keys
    • 1.Re6!
      • 1...Ke4
        • 2.Qf3#
      • 1...Sd3
        • 2.e4#
      • 1...Sf3
        • 2.e4#
      • 1...Sc4
        • 2.e4#
      • 1...Sg4
        • 2.Qb3#
      • 1...Sc6
        • 2.Qb3#
        • 2.e4#
      • 1...Sg6
        • 2.Qb3#
        • 2.e4#
      • 1...Sd7
        • 2.Qb3#
        • 2.e4#
      • 1...Sf7
        • 2.Qb3#
        • 2.e4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(b);::QAB1(C)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::R1(E)
      • Refutation
        • K(a);P-FLIGHT,XR(E)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);
  • Actual
    • R(E);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::QAB1(C)
      • S(b);::P(B)
      • S(b);N_GUARD::QAB(C)
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