MESON Chess Problem Database

Problem Display
PID: 151653 (3n4/nQ6/2N1N1R1/8/2PPkP1K/4p3/2R5/7b w - - 0 1)

Pikulik, Aleksandr Vasilevich

Shakhmaty v SSSR, 1969

3n4/nQ6/2N1N1R1/8/2PPkP1K/4p3/2R5/7b

#2

9 + 5

133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sb4#
    • 1...Kf3
      • 2.Se5#
    • 1...Kf5
      • 2.Se7#
  • Tries
    • 1.Sg5+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kxf4
        • 2.Rf6#
      • 1...Kf5!
    • 1.Qh7?
      • threat
        • 2.Rg3#
      • 1...Kd3
        • 2.Rgg2#
      • 1...Kf3
        • 2.Rg3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Sxe6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rf2#
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf3
        • 2.Qxh1#
      • 1...Kf5
        • 2.Rcg2#
      • 1...e2
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(F)
    • K(c);S_FLIGHT::QAB(I)+S(F),DCHECK
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(I)
        • K(c);P-FLIGHT,XP(D)::R(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(H)
      • Vars
        • K(c);S_FLIGHT::QAB(I)+R(H)
        • K(c);S_FLIGHT::R1(H)
      • Refutation
        • S(e);XS(G)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+R(A)
    • Vars
      • K(c);S_FLIGHT::S(G)
      • K(c);S_FLIGHT::QAB(I),XB(a)
      • K(c);S_FLIGHT::QAB(I)+R(A)
      • P(b);::QAB(I)+R(A)
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