MESON Chess Problem Database

Problem Display
PID: 266837 (8/8/1Q1p3B/2n5/2p1N1p1/3B1kP1/2R5/3n3K w - - 0 1)

Lynn, David P

The Problemist, 1998

8/8/1Q1p3B/2n5/2p1N1p1/3B1kP1/2R5/3n3K

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Rf2#
    • 1...Sf2+
      • 2.Rxf2#
    • 1...Sc3
      • 2.Rf2#
    • 1...Se3
      • 2.Rf2#
    • 1...d5
      • 2.Qf6#
  • Tries
    • 1.Rg2?
      • threat
        • 2.Sd2#
      • 1...Sf2+
        • 2.Rxf2#
      • 1...Sxe4
        • 2.Be2#
      • 1...Sb3
        • 2.Sg5#
      • 1...c3!
    • 1.Qxc5?
      • threat
        • 2.Qf5#
      • 1...Sf2+
        • 2.Rxf2#
        • 2.Qxf2#
      • 1...Se3
        • 2.Rf2#
        • 2.Qxe3#
      • 1...d5
        • 2.Qf8#
      • 1...dxc5!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Sg5#
      • 1...Sf2+
        • 2.Rxf2#
      • 1...Sxe4
        • 2.Be2#
      • 1...Se6
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::R1(B)
    • S(a);CHECK,N_GUARD::R1(B),XS(a)
    • P(f);OGATE::QAR(F)
  • Tries
    • Try
      • R(B);
      • Threat
        • S(E)
      • Vars
        • S(a);CHECK,N_GUARD::R1(B),XS(a)
        • S(e);SBLOCK,XS(E)::B(C)
        • S(e);::S(E)
      • Refutation
        • P(c);
    • Try
      • Q(F);XS(e)
      • Threat
        • QAR2(F)
      • Vars
        • P(f);OGATE::QAR(F)
      • Refutation
        • P(f);XQ(F)
  • Actual
    • B(G);
    • Threat
      • S(E)
    • Vars
      • S(a);CHECK,N_GUARD::R1(B),XS(a)
      • S(e);SBLOCK,XS(E)::B(C)
      • S(e);::S(E)
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