MESON Chess Problem Database

Problem Display
PID: 250451 (8/8/7R/n2k2P1/1P2p3/2B2P2/1NKPP3/3Q4 w - - 0 1)

Kapustin, Fedor Mikhailovich

Uralski Problemist, 2009

8/8/7R/n2k2P1/1P2p3/2B2P2/1NKPP3/3Q4

#2

10 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.dxe3#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qxa5#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sb3
        • 2.Qa8#
      • 1...Sc6
        • 2.Qa2#
      • 1...Sb7
        • 2.Qa2#
      • 1...exf3!
    • 1.d3?
      • threat
        • 2.dxe4#
        • 2.fxe4#
      • 1...exd3+
        • 2.Qxd3#
      • 1...exf3
        • 2.e4#
      • 1...e3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.fxe4#
      • 1...exf3
        • 2.Qxf3#
      • 1...e3
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAR(A)+P(D),XP(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A),XS(b)
      • Vars
        • S(b);OGATE::QAB(A)
        • S(b);N_GUARD::QAB(A)
      • Refutation
        • P(a);XP(G)
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);CHECK,OGATE,P_SPINP(a),XP(D)::QAR2(A),XP(a)
        • P(a);OGATE,XP(G)::P(E)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Threat
      • P(G),XP(a)
    • Vars
      • P(a);OGATE,P_SPINP(a),XP(G)::QAB(A),XP(a)
      • P(a);::QAB(A)+P(G)
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