MESON Chess Problem Database

Problem Display
PID: 246578 (8/5K2/8/2N2k2/2Np3Q/7b/1b6/5r2 w - - 0 1)

Yusupov, E

The Problemist, 1989

8/5K2/8/2N2k2/2Np3Q/7b/1b6/5r2

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Qh5#
    • 1...Bg4
      • 2.Qf6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sg3#
        • 2.Sed6#
      • 1...Rg1
        • 2.Sed6#
      • 1...Rf3
        • 2.Sed6#
      • 1...Ba3
        • 2.Sg3#
      • 1...Bg4!
    • 1.Se6?
      • threat
        • 2.Sg7#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Bg4
        • 2.Qh7#
      • 1...Rg1
        • 2.Qf4#
      • 1...d3!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Sd6#
      • 1...Bg4
        • 2.Qe5#
      • 1...Rf4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR2(B)
    • B(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(C)
        • B(b);::S(C)
      • Refutation
        • B(c);
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • R(a);N_GUARD::QAR1(B),XR(a)
        • B(c);SBLOCK::QAB(B)
        • R(a);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Threat
      • S(A)
    • Vars
      • B(c);SBLOCK::QAR1(B)
      • R(a);SBLOCK::QAB1(B)
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