MESON Chess Problem Database

Problem Display
PID: 138457 (4kB2/1pK2n1R/p3N1b1/5nQ1/8/1B6/8/8 w - - 0 1)

Quah, James

British Chess Magazine, 1992

4kB2/1pK2n1R/p3N1b1/5nQ1/8/1B6/8/8

#2

6 + 6

14772 Creative and Imaginative Chess Concepts 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qe7#
    • 1...Sg3
      • 2.Qe7#
    • 1...Sd4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qe7#
    • 1...S5d6
      • 2.Qe7#
    • 1...S5h6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...Sg7
      • 2.Qe7#
    • 1...Se5
      • 2.Qd8#
    • 1...S7d6
      • 2.Qd8#
    • 1...S7h6
      • 2.Qd8#
    • 1...Sd8
      • 2.Qxd8#
    • 1...Sh8
      • 2.Qd8#
  • Tries
    • 1.Sg7+?
      • 1...Sxg7
        • 2.Qe7#
      • 1...Kxf8!
  • Keys
    • 1.Kb6!
      • threat
        • 2.Ba4#
      • 1...Kd7
        • 2.Qd8#
      • 1...Sd4
        • 2.Qe7#
      • 1...S5d6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...Se5
        • 2.Qd8#
      • 1...S7d6
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • S(e);N_GUARD::QAR1(B)
    • S(e);N_GUARD::QAR1(B),XS(e)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);XS(C)::QAR1(B)
      • Refutation
        • K(f);P-FLIGHT,XB(F)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • B(A)
    • Vars
      • K(f);P_SPINS(e),S_FLIGHT::QAR1(B)
      • S(a);N_GUARD::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(e);N_GUARD::QAR1(B)
      • S(e);N_GUARD::QAR1(B),XS(e)
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