MESON Chess Problem Database

Problem Display
PID: 78517 (8/8/8/1KpppP2/2Bkpp2/8/3N1P2/n2N3Q w - - 0 1)

Lewis, Robert Tony

The Problemist, 2007

8/8/8/1KpppP2/2Bkpp2/8/3N1P2/n2N3Q

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Sb3#
    • 1...Sb3
      • 2.Sxb3#
    • 1...e3
      • 2.Qxd5#
    • 1...dxc4
      • 2.Qxe4#
  • Tries
    • 1.Qg2?
      • 1...dxc4
        • 2.Qxe4#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...e3
        • 2.Qxd5#
      • 1...f3!
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...dxc4
        • 2.Qxe4#
      • 1...e3
        • 2.Qxd5#
      • 1...exf3!
    • 1.Qe1?
      • 1...dxc4
        • 2.Qxe4#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...f3
        • 2.Qe3#
      • 1...e3!
    • 1.Qf1?
      • 1...dxc4
        • 2.Qxc4#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...e3
        • 2.Qd3#
      • 1...f3!
    • 1.Qh6?
      • 1...dxc4
        • 2.Qd6#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...f3
        • 2.Qe3#
      • 1...e3!
    • 1.f6?
      • 1...dxc4
        • 2.Qxe4#
      • 1...e3
        • 2.Qxd5#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...f3!
  • Keys
    • 1.Qh4!
      • 1...dxc4
        • 2.Qd8#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...e3
        • 2.fxe3#
      • 1...f3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • P(c);OGATE::QAR1(B),XP(f)
    • P(f);N_GUARD,XB(E)::QAR1(B),XP(c)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(f);N_GUARD,XB(E)::QAR1(B),XP(c)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • P(c);OGATE::QAR1(B),XP(f)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);N_GUARD,XB(E)::QAR1(B),XP(c)
        • P(c);OGATE::QAR1(B),XP(f)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(f);N_GUARD,XB(E)::QAR1(B),XP(c)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • P(d);N_GUARD::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(f);OGATE,XB(E)::QAR1(B),XP(f)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Vars
        • P(f);OGATEB,XB(E)::QAR2(B)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • P(d);OGATE::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • P(G);
      • Vars
        • P(f);N_GUARD,XB(E)::QAR1(B),XP(c)
        • P(c);OGATE::QAR1(B),XP(f)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Vars
      • P(f);OGATEB,XB(E)::QAR(B)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • P(c);OGATE,P_SPINP(d)::P(D),XP(c)
      • P(d);P_SPINP(c)::S(C),XP(d)
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