MESON Chess Problem Database

Problem Display
PID: 183364 (7n/3K4/8/b2k1pN1/3B4/3PP3/3nQ1P1/8 w - - 0 1)

Howard, David M

Problem Observer, 2016

7n/3K4/8/b2k1pN1/3B4/3PP3/3nQ1P1/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qf3#
      • 2.Qa2#
    • 1...Sf1
      • 2.Qf3#
      • 2.Qa2#
    • 1...Sb3
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
      • 2.Qa2#
    • 1...Sc4
      • 2.Qf3#
      • 2.dxc4#
    • 1...Se4
      • 2.Qa2#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf4#
      • 1...Bc7
        • 2.Sxc7#
      • 1...f4
        • 2.Sxf4#
        • 2.Qh5#
      • 1...Sg6!
    • 1.Sh7?
      • threat
        • 2.Sf6#
      • 1...Se4
        • 2.Qa2#
      • 1...Bd8!
    • 1.Qf3+?
      • 1...Se4
        • 2.Qxf5#
      • 1...Sxf3!
    • 1.Qxd2?
      • threat
        • 2.Qxa5#
        • 2.Qa2#
      • 1...Bc3
        • 2.Qa2#
      • 1...Bb4
        • 2.Qa2#
      • 1...Bb6
        • 2.Qa2#
      • 1...Bc7
        • 2.Qa2#
      • 1...Bd8
        • 2.Qa2#
      • 1...Bxd2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf6#
      • 1...Sxe4
        • 2.Qa2#
      • 1...fxe4
        • 2.Qh5#
      • 1...Bd8
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • B(b);N_GUARD::S(F),XB(b)
      • Refutation
        • S(e);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAR2(A),XP(d)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(A)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(a);OGATE,XS(F)::QAB(A)
      • P(d);OGATEB,XS(F)::QAR(A)
      • B(b);N_GUARD::S(F)
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Developed and maintained by Brian Stephenson.
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