MESON Chess Problem Database

Problem Display
PID: 235605 (N3B3/4p3/p7/k1p1p3/8/P3p3/4PP2/5KQ1 w - - 0 1)

Dolginovich, Nikolai Osipovich

Mat, 1973

N3B3/4p3/p7/k1p1p3/8/P3p3/4PP2/5KQ1

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sb6?
      • threat
        • 2.Sc4#
      • 1...c4
        • 2.Sxc4#
      • 1...Kxb6!
    • 1.Qg3?
      • 1...exf2
        • 2.Qc3#
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Qc7#
      • 1...e6!
    • 1.Qg7?
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Qc3#
      • 1...e6
        • 2.Qc7#
      • 1...exf2!
  • Keys
    • 1.Qg5!
      • 1...exf2
        • 2.Qd2#
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Qxc5#
      • 1...e6
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • P(c);::S(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XS(F)
    • Try
      • Q(B);
      • Vars
        • P(a);OGATE,XP(D)::QAB(B)
        • P(c);OGATEB::QAR(B),XP(d)
        • P(d);OGATE::QAB(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Vars
        • P(c);OGATEB::QAR(B),XP(d)
        • P(d);OGATE::QAB(B)
        • P(f);OGATE::QAB(B)
      • Refutation
        • P(a);XP(D)
  • Actual
    • Q(B);
    • Vars
      • P(a);OGATE,XP(D)::QAB(B)
      • P(c);OGATEB,P_SPINP(d)::QAR(B),XP(d)
      • P(d);OGATE,P_SPINP(c)::QAR2(B),XP(c)
      • P(f);OGATE::QAB(B)
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