MESON Chess Problem Database

Problem Display
PID: 232992 (qk1Kn3/R2Q4/8/8/8/3N4/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2002

qk1Kn3/R2Q4/8/8/8/3N4/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb7#
    • 1...Qxa7
      • 2.Qc8#
    • 1...Sd6
      • 2.Qc7#
    • 1...Sf6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qc7#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sa6#
      • 1...Qxa7
        • 2.Qc8#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Qc6!
    • 1.Qb5+?
      • 1...Qb7
        • 2.Qxb7#
      • 1...Kxa7+!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sa6#
      • 1...Qxa7
        • 2.Qc8#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Qc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::QAR1(C),XQ(a)
    • Q(a);SBLOCK,XR(B)::QAR1(C)
    • S(c);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • Q(a);SBLOCK,XR(B)::QAR1(C)
        • Q(a);N_GUARD::QAR1(C),XQ(a)
        • S(c);N_GUARD::QAB1(C),XS(c)
      • Refutation
        • Q(a);
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(C),XQ(a)
      • Refutation
        • K(b);CHECK,S_FLIGHT,XR(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • Q(a);SBLOCK,XR(B)::QAR1(C)
      • Q(a);N_GUARD::QAR1(C),XQ(a)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • Q(a);N_GUARD::S(A),XQ(a)
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