MESON Chess Problem Database

Problem Display
PID: 192735 (5q2/4NN2/2P1k1r1/1n4P1/1Qp1pR2/8/3P4/2K5 w - - 0 1)

Shire, David J

The Problemist, 1981

5q2/4NN2/2P1k1r1/1n4P1/1Qp1pR2/8/3P4/2K5

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Qxc4#
    • 1...Qxf7
      • 2.Rxe4#
    • 1...Rf6
      • 2.Rxf6#
    • 1...Rg7
      • 2.Rf6#
    • 1...Rg8
      • 2.Rf6#
    • 1...Sa3
      • 2.Qd6#
    • 1...Sc3
      • 2.Qd6#
    • 1...Sd4
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
    • 1...Sc7
      • 2.Qd6#
    • 1...c3
      • 2.Qxe4#
  • Keys
    • 1.d4!
      • threat
        • 2.d5#
      • 1...Qxe7
        • 2.Qxc4#
      • 1...Qxf7
        • 2.Rxe4#
      • 1...Rxg5
        • 2.Sxg5#
      • 1...Sxd4
        • 2.Qd6#
      • 1...cxd4 ep
        • 2.Qxe4#
      • 1...exd4 ep
        • 2.Qe1#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Qd8
        • 2.Sxd8#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#

This is a version of 9760

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(f);SBLOCK,XS(G)::QAB(C),XP(a)
    • Q(f);SBLOCK,XS(H)::R(D),XP(b)
    • R(e);N_GUARD::R1(D),XR(e)
    • R(e);N_GUARD::R1(D)
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • P(a);OGATE::QAR2(C),XP(b)
  • Actual
    • P(B);
    • Threat
      • P(B)
    • Vars
      • Q(f);SBLOCK,XS(G)::QAB(C),XP(a)
      • Q(f);SBLOCK,XS(H)::R(D),XP(b)
      • R(e);XP(E)::S(H),XR(e)
      • S(c);N_GUARD,XP(B)::QAR1(C)
      • P(a);EP,OGATE,XP(B)::QAR2(C),XP(b)
      • P(b);EP,OGATEB,XP(B)::QAR(C)
      • R(e);N_GUARD::R1(D),XR(e)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • Q(f);N_GUARD::S(H),XQ(f)
      • S(c);N_GUARD::QAR1(C)
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