MESON Chess Problem Database

Problem Display
PID: 180599 (3n4/2Q5/2pp4/3k4/2pP2K1/5P2/2R5/1B1R4 w - - 0 1)

Grassano, Carlos A

Problem Observer, 2012

3n4/2Q5/2pp4/3k4/2pP2K1/5P2/2R5/1B1R4

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb7
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...c3
      • 2.Ba2#
  • Tries
    • 1.Kf5?
      • 1...c3
        • 2.Ba2#
      • 1...Sb7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...c5
        • 2.dxc5#
      • 1...Se6!
    • 1.Qe7?
      • threat
        • 2.Qe4#
      • 1...c3
        • 2.Ba2#
      • 1...Se6!
    • 1.Qf7+?
      • 1...Se6
        • 2.Qf5#
      • 1...Sxf7!
    • 1.Qh7?
      • threat
        • 2.Qe4#
        • 2.Qf5#
      • 1...c3
        • 2.Ba2#
      • 1...c5
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
        • 2.Qxf7#
      • 1...Ke6!
  • Keys
    • 1.Re2!
      • 1...c3
        • 2.Ba2#
      • 1...Se6
        • 2.Be4#
      • 1...Sb7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...c5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB(G)
    • S(e);N_GUARD::QAB(G),XS(e)
    • P(a);OGATEB::B(A)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(a);OGATEB::B(A)
        • S(e);N_GUARD::QAB(G)
        • S(e);N_GUARD::QAB(G),XS(e)
        • P(c);OGATE::R(B)+P(E),XP(c)
      • Refutation
        • S(e);
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • P(a);OGATEB::B(A)
      • Refutation
        • S(e);
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);P_SPINS(e)::QAR2(G)
      • Refutation
        • S(e);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::B(A)
        • P(c);::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • P(a);OGATEB::B(A)
      • S(e);SBLOCK::B(A)
      • S(e);N_GUARD::QAB(G)
      • S(e);N_GUARD::QAB(G),XS(e)
      • P(c);OGATE::R(B)+P(E),XP(c)
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