MESON Chess Problem Database

Problem Display
PID: 7930 (b5Qq/5p2/6n1/1R2p3/3NkpP1/1N4bR/Kn2P3/2B5 w - - 0 1)

Lincoln, Robert A

The Problemist, 1994

b5Qq/5p2/6n1/1R2p3/3NkpP1/1N4bR/Kn2P3/2B5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Qxa8#
    • 1...Qxh3
      • 2.Qxa8#
    • 1...Qh4
      • 2.Qxa8#
    • 1...Qh5
      • 2.Qxa8#
    • 1...Qh6
      • 2.Qxa8#
    • 1...Qh7
      • 2.Qxa8#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sg5#
      • 1...Qh4
        • 2.Qxa8#
      • 1...Qh5
        • 2.Qxa8#
      • 1...Qh6
        • 2.Qxa8#
      • 1...Bh4
        • 2.Sfd2#
      • 1...f6
        • 2.Sc5#
      • 1...Qf6!
    • 1.Sf5?
      • threat
        • 2.Sd2#
        • 2.Sd6#
      • 1...Qf6
        • 2.Sd2#
      • 1...Be1
        • 2.Sd6#
      • 1...Bd5
        • 2.Sd6#
      • 1...f3
        • 2.Sxg3#
        • 2.Sd6#
      • 1...Sc4!
    • 1.Qxg6+?
      • 1...f5
        • 2.Qxf5#
      • 1...fxg6!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg5#
      • 1...fxe6
        • 2.Qxg6#
      • 1...Qf6
        • 2.Qxa8#
      • 1...Qh4
        • 2.Qxa8#
      • 1...Qh5
        • 2.Qxa8#
      • 1...Qh6
        • 2.Qxa8#
      • 1...Bh4
        • 2.Sd2#
      • 1...f6
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD::QAB(I),XB(h)
    • Q(i);N_GUARD,XR(E)::QAB(I),XB(h)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(i);N_GUARD::QAB(I),XB(h)
        • B(b);::S(F)
        • P(g);::S(D)
      • Refutation
        • Q(i);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);::S(D)
        • B(b);::S(F)
        • B(h);P_PINS(D)::S(F)
      • Refutation
        • S(a);
    • Try
      • Q(I);CHECK,XS(f)
      • Vars
        • P(g);P_SPINP(g)::QAB1(I),XP(g)
      • Refutation
        • P(g);XQ(I)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • P(g);N_GUARD,XS(F)::QAB(I),XS(f)
      • Q(i);N_GUARD::QAB(I),XB(h)
      • B(b);::S(D)
      • P(g);::S(F)
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Developed and maintained by Brian Stephenson.
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