MESON Chess Problem Database

Problem Display
PID: 137945 (3b4/8/8/8/1Bp1pQ2/KR3P1r/3P1k2/R7 w - - 0 1)

Nedeljkovic, Miomir

Liga Problemista, 1980/8

3b4/8/8/8/1Bp1pQ2/KR3P1r/3P1k2/R7

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qe3#
    • 1...Rh2
      • 2.Qxh2#
    • 1...Rxf3
      • 2.Qh2#
  • Tries
    • 1.Bc5+?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kg2
        • 2.Rg1#
      • 1...e3!
    • 1.Qe3+?
      • 1...Kg2
        • 2.Qg1#
      • 1...Kg3!
    • 1.fxe4+?
      • 1...Ke2
        • 2.Qf1#
      • 1...Rf3
        • 2.Qh2#
        • 2.Qxf3#
      • 1...Kg2!
  • Keys
    • 1.Rb2!
      • threat
        • 2.d3#
        • 2.d4#
      • 1...Rxf3+
        • 2.d3#
      • 1...Ke2
        • 2.Qe3#
      • 1...Kg2
        • 2.d3#
        • 2.d4#
      • 1...Bf6
        • 2.d4#
      • 1...c3
        • 2.dxc3#
      • 1...e3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(G)
    • R(b);N_GUARD::QAR2(G),XR(b)
    • R(b);N_GUARD,P_PINR(D),P_SPINR(b),XP(E)::QAR2(G)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(G)
        • K(a);P-FLIGHT::R1(A)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK,P_SPINR(D),XP(d)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(G)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(D);P_SPINP(E)
    • Threat
      • DUALS(2)
    • Vars
      • R(b);CHECK,P_SPINR(b),XP(E)::R(D)+P(B)
      • K(a);P-FLIGHT::QAR1(G)
      • B(e);::R(D)+P(B)
      • P(c);N_PINP(E),OGATE::R(D)+P(B),XP(c)
      • P(d);N_PINP(E),OGATE::R(D)+P(B),XP(d)
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