MESON Chess Problem Database

Problem Display
PID: 161907 (n7/1Rq2k2/6RP/8/B7/B5Q1/7K/8 w - - 0 1)

Kapustin, Fedor Mikhailovich

Kuligin, M

Sachmatija, 2009

n7/1Rq2k2/6RP/8/B7/B5Q1/7K/8

#2

7 + 3

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Ra6?
      • 1...Qxb7
        • 2.Qg6#
        • 2.Qg7#
      • 1...Qd7
        • 2.Qg6#
      • 1...Qe7
        • 2.Qg7#
      • 1...Sb6!
    • 1.Rgb6?
      • 1...Qxb7
        • 2.Qg6#
        • 2.Qg7#
      • 1...Qd7
        • 2.Qg6#
      • 1...Qe7
        • 2.Qg7#
      • 1...Sxb6!
    • 1.Rd6?
      • threat
        • 2.Qg7#
      • 1...Ke7
        • 2.Qg7#
      • 1...Kf8
        • 2.Rf6#
      • 1...Qd7!
    • 1.Qe5?
      • threat
        • 2.Be8#
        • 2.Rg7#
      • 1...Qe7
        • 2.Qf6#
        • 2.Qg7#
        • 2.Qf5#
      • 1...Qd7
        • 2.Rg7#
        • 2.Qe6#
      • 1...Kxg6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Rg7#
      • 1...Qd7
        • 2.Qe6#
      • 1...Qe7
        • 2.Qf6#

This anticipates 267335(2012)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);
      • Vars
        • Q(a);N_PINQ(C)::QAB1(C)
        • Q(a);N_PINQ(C)::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • R(E);
      • Vars
        • Q(a);N_PINQ(C)::QAB1(C)
        • Q(a);N_PINQ(C)::QAR1(C)
      • Refutation
        • S(c);XR(E)
    • Try
      • R(E);N_SPINQ(C)
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • K(b);N_SPINQ(a),P-FLIGHT::B(B)+R(E),DCHECK
      • Refutation
        • Q(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);N_SPINQ(a),S_FLIGHT,XR(E)
  • Actual
    • Q(C);
    • Threat
      • R1(E)
    • Vars
      • Q(a);N_PINQ(C)::QAB1(C)
      • Q(a);N_PINQ(C)::QAR1(C)
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