MESON Chess Problem Database

Problem Display
PID: 165471 (8/3p4/1N2k1K1/n7/8/Q3N3/8/8 w - - 0 1)

Zarhs, Aleksandr

Smena, 1995

8/3p4/1N2k1K1/n7/8/Q3N3/8/8

#2

4 + 3

56 The Problemist 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Sec4?
      • threat
        • 2.Qd6#
        • 2.Qe3#
      • 1...d6
        • 2.Qxd6#
        • 2.Qe3#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sc6
        • 2.Qd6#
      • 1...Sb7
        • 2.Qe3#
      • 1...Sxc4!
    • 1.Sc8?
      • threat
        • 2.Qd6#
        • 2.Qe7#
      • 1...d6
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qe7#
      • 1...Sc6
        • 2.Qd6#
      • 1...Sb7
        • 2.Qe7#
      • 1...Ke5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qd6#
        • 2.Qe7#
        • 2.Qe3#
      • 1...Ke5
        • 2.Qe3#
      • 1...Sb3
        • 2.Qd6#
        • 2.Qe7#
      • 1...Sc4
        • 2.Qe7#
      • 1...Sc6
        • 2.Qd6#
      • 1...Sb7
        • 2.Qe7#
        • 2.Qe3#
      • 1...d6
        • 2.Qxd6#
        • 2.Qe3#

FEATURES

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