MESON Chess Problem Database

Problem Display
PID: 240451 (3k4/1Q1ppB2/n5K1/8/8/8/8/8 w - - 0 1)

Parkhomenko, Nikolai A

Problemist Pribuzhya, 1992

3k4/1Q1ppB2/n5K1/8/8/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qb8#
    • 1...Sc5
      • 2.Qb8#
    • 1...Sc7
      • 2.Qb8#
    • 1...Sb8
      • 2.Qxb8#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qxd7#
      • 1...Ke8
        • 2.Qc8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sc7
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...d5
        • 2.Qc8#
        • 2.Qd7#
      • 1...d6
        • 2.Qc8#
        • 2.Qd7#
      • 1...dxe6!
    • 1.Qa8+?
      • 1...Sb8
        • 2.Qxb8#
      • 1...Kc7!
    • 1.Qb6+?
      • 1...Sc7
        • 2.Qb8#
      • 1...Kc8!
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxd7#
      • 1...Kxe8
        • 2.Qc8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sc7
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...d5
        • 2.Qd7#
      • 1...d6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD::QAR2(B)
        • S(a);N_GUARD::QAR2(B),XS(a)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(d);P-FLIGHT,XB(C)::QAR2(B)
      • S(a);N_GUARD::QAR2(B)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • P(b);::QAR1(B)
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