MESON Chess Problem Database

Problem Display
PID: 237384 (n7/8/3N4/1PBk1P2/1P1ppK2/5n2/8/7Q w - - 0 1)

Dyachuk, Vasyl Vasilovich

4th HM., Schweizerische Schachzeitung, 2014-2016

n7/8/3N4/1PBk1P2/1P1ppK2/5n2/8/7Q

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qxe4#
    • 1...Sg1
      • 2.Qxe4#
    • 1...Sh2
      • 2.Qxe4#
    • 1...Sh4
      • 2.Qxe4#
    • 1...Se5
      • 2.Qxe4#
    • 1...e3
      • 2.Qxf3#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Qxe4#
        • 2.Qb3#
      • 1...Sb6
        • 2.Qxe4#
      • 1...d3
        • 2.Qxe4#
      • 1...exf3!
    • 1.Qa1?
      • threat
        • 2.Qa2#
        • 2.Qxa8#
      • 1...Sd2
        • 2.Qxd4#
        • 2.Qxa8#
      • 1...Se5
        • 2.Qxd4#
      • 1...Sc7
        • 2.Qa2#
      • 1...Sb6!
    • 1.Qb1?
      • threat
        • 2.Qa2#
        • 2.Qxe4#
        • 2.Qb3#
      • 1...Se5
        • 2.Qxe4#
      • 1...Sg5
        • 2.Qa2#
        • 2.Qb3#
      • 1...Sb6
        • 2.Qxe4#
      • 1...d3
        • 2.Qa2#
        • 2.Qb3#
      • 1...e3
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Sd2!
    • 1.Qh8?
      • threat
        • 2.Qxa8#
        • 2.Qg8#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qxd4#
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Sb6
        • 2.Qg8#
      • 1...Sc7!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qa2#
        • 2.Qg8#
      • 1...Sd2
        • 2.Qg8#
      • 1...Se5
        • 2.Qxe4#
      • 1...Sg5
        • 2.Qa2#
      • 1...Sb6
        • 2.Qg8#
      • 1...Sc7
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(a);OGATE,P_SPINP(c)::QAB1(A),XP(c)
    • P(c);OGATEB,P_SPINS(a)::QAB(A),XS(a)
  • Tries
    • Try
      • Q(A);P_PINP(c),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAB1(A),XP(c)
        • P(b);::QAB1(A),XP(c)
      • Refutation
        • P(c);N_SPINP(c),XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(A),XP(b)
        • S(e);::QAB(A)
      • Refutation
        • S(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::QAB1(A),XP(c)
        • S(e);::QAB1(A),XP(c)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(e);::QAB(A)
      • Refutation
        • S(e);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(a);P_SPINP(c)::QAB(A)
      • S(a);OGATE,P_SPINP(c)::QAB1(A),XP(c)
      • S(e);::QAB(A)
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