MESON Chess Problem Database

Problem Display
PID: 78379 (1B6/5n1N/n2pp3/4k3/1pP2p2/1K6/4PQ2/1B6 w - - 0 1)

Saunders, Denis M

Australian Chess, 2003

1B6/5n1N/n2pp3/4k3/1pP2p2/1K6/4PQ2/1B6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5+
      • 2.Qxc5#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg7#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...f3
        • 2.Qe3#
      • 1...Sg5!
    • 1.e3?
      • threat
        • 2.Qb2#
        • 2.Qxf4#
        • 2.exf4#
      • 1...fxe3
        • 2.Qxe3#
        • 2.Qf6#
      • 1...f3
        • 2.Qg3#
        • 2.Qb2#
        • 2.Qh2#
      • 1...Sc5+!
    • 1.e4?
      • threat
        • 2.Qb2#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...fxe4 ep
        • 2.Qxe3#
        • 2.Qf6#
      • 1...f3!
  • Keys
    • 1.Qa7!
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Sxb8
        • 2.Qa1#
      • 1...f3
        • 2.Qe3#
      • 1...Sc7
        • 2.Qa1#
      • 1...Sg5
        • 2.Qg7#
      • 1...Sh6
        • 2.Qg7#
      • 1...Sd8
        • 2.Qg7#
      • 1...Sh8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);CHECK,N_GUARD::QAR2(C),XS(d)
    • P(b);N_GUARD::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • S(d);CHECK,N_GUARD::QAR2(C),XS(d)
        • P(b);N_GUARD::QAR2(C)
      • Refutation
        • S(g);
    • Try
      • P(B);
      • Threat
        • DUALS(3)
      • Refutation
        • S(d);CHECK
    • Try
      • P(B);
      • Threat
        • QAB(C)
      • Vars
        • S(d);CHECK,N_GUARD::QAR2(C),XS(d)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • S(d);CHECK,N_GUARD::QAR2(C),XS(d)
      • S(d);N_SPINP(e),OGATE,XB(G)::QAB(C)
      • P(b);N_GUARD::QAR2(C)
      • S(d);N_SPINP(e),OGATE::QAB(C)
      • S(g);OGATE::QAB(C)
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