MESON Chess Problem Database

Problem Display
PID: 180233 (1B6/4N3/p7/N1k5/5P2/pR3P2/KnP5/1Q1b4 w - - 0 1)

Lider, Valentin Viktorovich

Comm., Freie Presse, 1984

1B6/4N3/p7/N1k5/5P2/pR3P2/KnP5/1Q1b4

#2

9 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Ba7#
    • 1...Bxc2
      • 2.Qg1#
    • 1...Be2
      • 2.Qg1#
    • 1...Bxf3
      • 2.Qg1#
  • Tries
    • 1.Be5?
      • 1...Bxc2
        • 2.Qg1#
      • 1...Bxf3
        • 2.Qg1#
      • 1...Sd3
        • 2.Rc3#
      • 1...Be2
        • 2.Qg1#
      • 1...Sc4
        • 2.Sb7#
      • 1...Sa4!
    • 1.Rb7?
      • 1...Bxc2
        • 2.Qg1#
      • 1...Bxf3
        • 2.Qg1#
      • 1...Sd3
        • 2.Qb6#
      • 1...Be2
        • 2.Qg1#
      • 1...Sa4
        • 2.Qb4#
      • 1...Sc4
        • 2.Sb3#
      • 1...Kd4!
    • 1.Qc1?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Ba7#
        • 2.Qe3#
      • 1...Sc4!
    • 1.Qxb2?
      • threat
        • 2.Qc3#
        • 2.Qe5#
      • 1...Bxf3
        • 2.Qc3#
      • 1...Be2
        • 2.Qe5#
      • 1...axb2!
  • Keys
    • 1.Qa1!
      • 1...Kd4
        • 2.Ba7#
      • 1...Bxc2
        • 2.Qg1#
      • 1...Bxf3
        • 2.Qg1#
      • 1...Sd3
        • 2.Qc3#
      • 1...Be2
        • 2.Qg1#
      • 1...Sa4
        • 2.Qe5#
      • 1...Sc4
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::B(I)
    • B(a);OGATE,XP(C)::QAB(A)
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,XP(E)::QAB(A)
  • Tries
    • Try
      • B(I);
      • Vars
        • B(a);OGATE,XP(C)::QAB(A)
        • B(a);OGATE,XP(E)::QAB(A)
        • S(b);N_GUARD::R(D)
        • B(a);OGATE::QAB(A)
        • S(b);SBLOCK::S(G)
      • Refutation
        • S(b);
    • Try
      • R(D);
      • Vars
        • B(a);OGATE,XP(C)::QAB(A)
        • B(a);OGATE,XP(E)::QAB(A)
        • S(b);OGATE::QAB1(A)
        • B(a);OGATE::QAB(A)
        • S(b);SBLOCK::S(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XP(E)::QAR2(A)
        • B(a);::QAR2(A)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(d);P_SPINS(b),S_FLIGHT::B(I)
      • B(a);OGATE,XP(C)::QAB(A)
      • B(a);OGATE,XP(E)::QAB(A)
      • S(b);OGATE::QAR2(A)
      • B(a);OGATE::QAB(A)
      • S(b);SBLOCK::S(G)
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