MESON Chess Problem Database

Problem Display
PID: 18848 (3B4/7N/4n1p1/3pQ3/R3bnk1/8/7K/4N3 w - - 0 1)

Smedley, Don A

The Problemist, 1958

3B4/7N/4n1p1/3pQ3/R3bnk1/8/7K/4N3

#2

6 + 6

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qe2#
    • 1...Sd4
      • 2.Qg5#
    • 1...Sc5
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sc7
      • 2.Qg5#
    • 1...Sg7
      • 2.Qg5#
    • 1...Sxd8
      • 2.Qg5#
    • 1...Sf8
      • 2.Qg5#
  • Keys
    • 1.Bg5!
      • threat
        • 2.Sf6#
      • 1...Kh5
        • 2.Sf6#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...Bf5
        • 2.Qe2#
      • 1...Sh5
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(a);OGATE,P_SPINS(b),SBLOCK::QAB(D)
    • S(e);N_GUARD::QAR1(D)
    • S(e);N_GUARD::QAR1(D),XS(e)
    • S(e);N_GUARD,XB(F)::QAR1(D)
  • Actual
    • B(F);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::S(E)
      • S(e);OGATE,XB(F)::QAR1(D),XS(e)
      • B(a);OGATE,P_SPINS(b),SBLOCK::QAB(D)
      • S(b);N_GUARD,P_SPINB(a),SBLOCK::QAB(D),XS(e)
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