MESON Chess Problem Database

Problem Display
PID: 67576 (2b1N3/pp1np3/2k2pQ1/n4p2/P1NPP3/7K/8/8 w - - 0 1)

Shanahan, Ian

The Problemist, 1994

2b1N3/pp1np3/2k2pQ1/n4p2/P1NPP3/7K/8/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Se5#
    • 1...fxe4
      • 2.Qxe4#
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qe6#
        • 2.Qb5#
        • 2.Qd5#
      • 1...Sxc4
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
        • 2.Qd5#
      • 1...b6
        • 2.Qd5#
      • 1...Sc5
        • 2.Qxc8#
        • 2.d5#
      • 1...Se5
        • 2.Qxc8#
      • 1...Sb6
        • 2.Sxa5#
      • 1...Sb8
        • 2.Qxc8#
      • 1...Sf8
        • 2.Qxc8#
      • 1...a6
        • 2.Qe6#
        • 2.Qd5#
      • 1...e5
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD,SBLOCK::S(C)
    • P(b);OGATE,XP(E)::QAB(F),XP(b)
  • Actual
    • Q(F);N_PINP(d),XP(b)
    • Threat
      • DUALS(3)
    • Vars
      • S(a);XS(C)::QAB1(F)
      • P(f);::QAB1(F)
      • S(g);OGATE,P_PINQ(F)::QAR2(F),XB(i)
      • S(g);P_PINQ(F),SBLOCK::S(C),XS(a)
      • P(h);::QAR2(F)
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