MESON Chess Problem Database

Problem Display
PID: 78475 (8/6Bp/8/n1Pk2N1/Q1RN3q/5P2/5P2/1K4bB w - - 0 1)

Howard, David M

Source?, 1996

8/6Bp/8/n1Pk2N1/Q1RN3q/5P2/5P2/1K4bB

#2

10 + 5

136 Problem Observer 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.fxe4#
    • 1...Qg4
      • 2.fxg4#
    • 1...Bh2
      • 2.f4#
    • 1...Sxc4
      • 2.Qc6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc3#
      • 1...Qxe4+
        • 2.fxe4#
      • 1...Sxc4
        • 2.Qc6#
        • 2.Qa8#
      • 1...Qf6!
  • Keys
    • 1.Sde6!
      • threat
        • 2.Sc7#
      • 1...Qe4+
        • 2.fxe4#
      • 1...Qxc4
        • 2.Qd7#
      • 1...Sxc4
        • 2.Qa8#
      • 1...Qg3
        • 2.Rd4#
      • 1...Qh2
        • 2.Rd4#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Bh2
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,OGATE::P(D),XQ(b)
    • Q(b);OGATE::B(B)+P(D),XQ(b)
    • B(a);S_CUTQ(b)::B(B)+P(D)
    • S(c);N_GUARD,SBLOCK,XR(F)::QAB1(E)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • Q(b);CHECK,OGATE,XS(I)::P(D),XQ(b)
      • Refutation
        • Q(b);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(b);CHECK,OGATE::P(D),XQ(b)
      • Q(b);SBLOCK,XR(F)::QAR2(E)
      • S(c);OGATE,SBLOCK,XR(F)::QAB(E)
      • Q(b);N_GUARD::R1(F)
      • Q(b);N_GUARD::S(G),XQ(b)
      • B(a);S_CUTQ(b)::B(B)+P(D)
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