MESON Chess Problem Database

Problem Display
PID: 146823 (6r1/n2R3B/K3Q1r1/3Pb2b/4kPRN/3p1N2/3B2Pn/8 w - - 0 1)

Lebedev, Aleksandr N

Il Problema, 1932

6r1/n2R3B/K3Q1r1/3Pb2b/4kPRN/3p1N2/3B2Pn/8

#2

11 + 8

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qf5#
  • Tries
    • 1.Bxg6+?
      • 1...Bxg6
        • 2.Qxe5#
      • 1...Rxg6!
    • 1.Rd6?
      • threat
        • 2.Qf5#
        • 2.Qxe5#
      • 1...Bxg4
        • 2.Qxe5#
      • 1...Sxg4
        • 2.Qf5#
      • 1...Re8
        • 2.Qf5#
      • 1...Rf8
        • 2.Qxe5#
      • 1...Sc6
        • 2.Qf5#
      • 1...Sxf3!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sg5#
      • 1...Bxf4
        • 2.Rxf4#
        • 2.Qe6#
      • 1...Sxf3
        • 2.gxf3#
      • 1...Bd6
        • 2.Qd4#
      • 1...Bf6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);N_PINQ(I)::QAB1(I)
  • Tries
    • Try
      • B(K);CHECK,N_SPINQ(I),XR(f)
      • Vars
        • B(e);XB(K)::QAR1(I),XB(d)
      • Refutation
        • R(h);P_PINQ(I),XB(K)
    • Try
      • R(J);N_SPINQ(I)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);XR(E)::QAR1(I),XB(d)
        • S(a);XR(E)::QAB1(I)
        • R(h);::QAB1(I)
        • R(h);::QAR1(I),XB(d)
        • S(g);::QAB1(I)
      • Refutation
        • S(a);XS(C)
  • Actual
    • Q(I);N_PINB(d)
    • Threat
      • S(C)
    • Vars
      • S(a);OGATE,XS(C)::P(B),XS(a)
      • B(d);N_PINQ(I)::QAR1(I)
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