MESON Chess Problem Database

Problem Display
PID: 246082 (Q3K1k1/6rp/8/5N2/8/8/8/8 w - - 0 1)

Zinoviev, Nikolai

Kudesnik, 1991

Q3K1k1/6rp/8/5N2/8/8/8/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Ke7#
    • 1...Rg2
      • 2.Ke7#
    • 1...Rg3
      • 2.Ke7#
    • 1...Rg4
      • 2.Ke7#
    • 1...Rg5
      • 2.Ke7#
    • 1...Rg6
      • 2.Ke7#
    • 1...Re7+
      • 2.Kxe7#
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxg7#
      • 1...Re7+
        • 2.Sxe7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Rg1
        • 2.Sh6#
        • 2.Se7#
      • 1...Rg2
        • 2.Sh6#
        • 2.Se7#
      • 1...Rg3
        • 2.Sh6#
        • 2.Se7#
      • 1...Rg4
        • 2.Sh6#
        • 2.Se7#
      • 1...Rg5
        • 2.Sh6#
        • 2.Se7#
      • 1...Rg6
        • 2.Se7#
      • 1...Ra7
        • 2.Sh6#
      • 1...Rb7
        • 2.Sh6#
      • 1...Rc7
        • 2.Sh6#
      • 1...Rd7
        • 2.Sh6#
      • 1...Rf7
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(a);::QAR(B)+K(C)
    • R(a);CHECK::QAR(B)+K(C),XR(a)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XR(a)
    • Vars
      • R(a);CHECK,N_GUARD::S(A),XR(a)
      • K(c);P-FLIGHT,P_SPINR(a)::QAB1(B),XR(a)
      • R(a);N_GUARD::S(A)
      • R(a);::S(A)
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