MESON Chess Problem Database

Problem Display
PID: 76228 (1N4B1/1P3r2/RB1Pk1pK/2P3Q1/1N1pp2p/8/7r/5q2 w - - 0 1)

Novitski, Petr Adrinovich

5th Prize, Troll, 2005-2006

1N4B1/1P3r2/RB1Pk1pK/2P3Q1/1N1pp2p/8/7r/5q2

#2

10 + 8

23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qe7#
    • 1...Qf6
      • 2.Qd5#
  • Tries
    • 1.Kxg6?
      • threat
        • 2.Qe7#
        • 2.Qd5#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qg2
        • 2.Bxf7#
      • 1...Qc4
        • 2.Bxf7#
        • 2.Qf6#
        • 2.Qe7#
        • 2.Qf5#
      • 1...Qg1
        • 2.Bxf7#
      • 1...Rg2!
    • 1.Sd7?
      • threat
        • 2.Sf8#
      • 1...Qf5
        • 2.Qe7#
      • 1...Kxd7!
    • 1.Bd8?
      • threat
        • 2.Qd5#
      • 1...Qf5
        • 2.Qe7#
      • 1...Qc4
        • 2.Qf6#
      • 1...Qc1
        • 2.d7#
      • 1...Qf4!
  • Keys
    • 1.d7!
      • threat
        • 2.d8S#
      • 1...Qf5
        • 2.Bc7#
      • 1...Qf6
        • 2.Bd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::QAR1(C)
    • Q(a);SBLOCK::QAB1(C)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,N_GUARD::QAB1(C),XQ(a)
        • Q(a);CHECK,N_GUARD::QAR1(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(C)::B(J),XR(h)
      • Refutation
        • R(b);P_PINQ(C)
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • Q(a);SBLOCK::QAR1(C)
      • Refutation
        • K(f);N_SPINR(h),S_FLIGHT,XS(I)
    • Try
      • B(E);
      • Threat
        • QAB1(C)
      • Vars
        • Q(a);SBLOCK::QAR1(C)
        • Q(a);N_GUARD::QAR1(C)
        • Q(a);N_GUARD,P_PINQ(C)::R(D)+P(F)
      • Refutation
        • Q(a);P_PINQ(C)
  • Actual
    • P(F);
    • Threat
      • P=S
    • Vars
      • Q(a);N_GUARD::R(D)+B(E)
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