MESON Chess Problem Database

Problem Display
PID: 42055 (1Q6/n4N1K/4P3/5Rp1/1bk2n2/rqrbP3/N1P5/5B2 w - - 0 1)

Macleod, Norman Alasdair

2nd Prize, Gooderson MT (The Problemist), 1984

1Q6/n4N1K/4P3/5Rp1/1bk2n2/rqrbP3/N1P5/5B2

#2

9 + 9

3748 FIDE Album (1983-1985) 1992
6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Qxb4#
    • 1...Ba5
      • 2.Sd6#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sc6
      • 2.Qb5#
    • 1...Sc8
      • 2.Qb5#
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sxe6
        • 2.Qd5#
        • 2.Qxe6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc6
        • 2.Qb5#
      • 1...Qxc2!
    • 1.Qd6?
      • threat
        • 2.Qd4#
      • 1...Qxc2
        • 2.Qxb4#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sxe6
        • 2.Qd5#
        • 2.Qxe6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sb5
        • 2.Se5#
      • 1...Sc6!
    • 1.Qc7+?
      • 1...Bc5
        • 2.Sd6#
        • 2.Qxc5#
      • 1...Sc6!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...Qxc2
        • 2.Qxb4#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Sc6
        • 2.Qb5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sd5
        • 2.Se5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Se2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qe4#
      • 1...Qxc2
        • 2.Qxb4#
      • 1...Sxe6
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sc6
        • 2.Qb5#
      • 1...Bc5
        • 2.Se5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD,XP(C)::QAR1(I),XB(e)
    • B(e);N_GUARD::S(G)
    • B(e);N_GUARD::S(G),XB(e)
    • S(i);N_GUARD::QAB1(I),XS(i)
    • S(i);N_GUARD::QAB1(I)
    • P(h);N_GUARD::QAR(I),XS(g)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);N_GUARD::QAR1(I),XB(e)
        • S(g);N_GUARD::QAB1(I),XS(g)
        • S(g);N_GUARD,N_SPINB(d)::QAB1(I)
        • S(i);N_GUARD::QAB1(I),XS(i)
        • S(i);N_GUARD::QAB1(I)
      • Refutation
        • Q(b);XP(C)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(b);N_GUARD,XP(C)::QAR1(I),XB(e)
        • B(e);XQ(I)::S(G),XB(e)
        • B(e);N_GUARD::QAR1(I),XB(e)
        • S(g);N_GUARD::QAB1(I),XS(g)
        • S(g);N_GUARD,N_SPINB(d)::QAB1(I)
        • S(i);SBLOCK::S(G)
      • Refutation
        • S(i);
    • Try
      • Q(I);CHECK
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(b);N_GUARD,XP(C)::QAR1(I),XB(e)
        • S(g);OGATE,XP(F)::QAB(I),XS(g)
        • S(i);N_GUARD::QAB1(I)
        • B(e);N_GUARD::QAR1(I),XB(e)
        • S(g);SBLOCK::S(G)
        • S(i);N_GUARD::QAB1(I),XS(i)
      • Refutation
        • S(g);N_SPINB(d)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • Q(b);N_GUARD,XP(C)::QAR1(I),XB(e)
      • S(g);N_GUARD,XP(F)::QAB1(I)
      • S(g);N_GUARD::QAB1(I),XS(g)
      • S(i);N_GUARD::QAB1(I)
      • B(e);SBLOCK::S(G)
      • S(g);N_GUARD,N_SPINB(d)::QAB1(I)
      • S(i);N_GUARD::QAB1(I),XS(i)
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