MESON Chess Problem Database

Problem Display
PID: 164527 (8/8/1K2n3/3N4/k7/1p6/5Q2/n7 w - - 0 1)

Zujevas, Nikolajus

Sachmatija, 2007

8/8/1K2n3/3N4/k7/1p6/5Q2/n7

#2

3 + 4

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4+?
      • 1...Ka3
        • 2.Qxa1#
      • 1...Sxd4!
    • 1.Qc5?
      • threat
        • 2.Sc3#
        • 2.Qb4#
        • 2.Qa5#
      • 1...b2
        • 2.Qb4#
      • 1...Sc2
        • 2.Sc3#
        • 2.Qa5#
      • 1...Sxc5!
    • 1.Qf1?
      • threat
        • 2.Qa6#
        • 2.Qxa1#
      • 1...Ka3
        • 2.Qxa1#
      • 1...Sc2
        • 2.Qa6#
      • 1...Sc5
        • 2.Qxa1#
      • 1...Sc7
        • 2.Qxa1#
      • 1...b2!
    • 1.Qd2?
      • threat
        • 2.Qb4#
        • 2.Qa5#
      • 1...b2
        • 2.Qb4#
      • 1...Sc2
        • 2.Qa5#
      • 1...Ka3!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb4#
        • 2.Qa5#
        • 2.Qxa1#
      • 1...Ka3
        • 2.Qxa1#
      • 1...b2
        • 2.Qb4#
      • 1...Sc2
        • 2.Qa5#

This anticipates 166159(2016), 169247(2017)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAR1(A)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XS(a)
        • S(a);::QAR2(A)
        • S(d);::QAR(A),XS(a)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(A)
        • S(a);::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(c);P-FLIGHT::QAR2(A),XS(a)
      • P(b);::QAR1(A)
      • S(a);::QAR1(A)
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