MESON Chess Problem Database

Problem Display
PID: 71777 (K1N2b2/pQ6/P6B/1pkpn3/Rp1r4/4P3/R1Pn4/2N2q1B w - - 0 1)

Swindley, Cyril P

The Problemist, 1976

K1N2b2/pQ6/P6B/1pkpn3/Rp1r4/4P3/R1Pn4/2N2q1B

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Bxf8#
    • 1...Rc4
      • 2.Qxd5#
    • 1...Rf4
      • 2.Qxd5#
    • 1...Rg4
      • 2.Qxd5#
    • 1...Rh4
      • 2.Qxd5#
    • 1...Sdc4
      • 2.Sb3#
    • 1...Sd3
      • 2.Qc7#
    • 1...Sf3
      • 2.Qc7#
    • 1...Sec4
      • 2.Qc7#
    • 1...Sg4
      • 2.Qc7#
    • 1...Sg6
      • 2.Qc7#
    • 1...Sd7
      • 2.Qc7#
    • 1...Sf7
      • 2.Qc7#
    • 1...b3
      • 2.exd4#
  • Tries
    • 1.Qb6+?
      • 1...Kc4
        • 2.Qxd4#
      • 1...axb6!
    • 1.Qxa7+?
      • 1...Kc4
        • 2.Qxd4#
      • 1...Kc6!
  • Keys
    • 1.c4!
      • threat
        • 2.Qxb5#
      • 1...Kxc4
        • 2.Rc2#
      • 1...Qxc4
        • 2.Bxf8#
      • 1...Rxc4
        • 2.Qxd5#
      • 1...Sdxc4
        • 2.Sb3#
      • 1...Sexc4
        • 2.Qc7#
      • 1...bxa4
        • 2.Qb5#
      • 1...bxc4
        • 2.Ra5#
      • 1...dxc4
        • 2.Qxa7#
      • 1...bxc4 ep
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD,SBLOCK::B(H),XB(j)
    • R(d);N_GUARD::QAR1(I),XP(g)
    • S(b);N_GUARD,SBLOCK::S(A)
    • S(h);N_GUARD::QAR2(I)
    • S(h);N_GUARD,SBLOCK::QAR2(I)
    • P(c);::P(E),XR(d)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT,P_SPINP(c)::QAR1(I),XR(d)
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • K(f);OGATE,P-FLIGHT,P_SPINP(c)::QAR1(I),XR(d)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(g)
  • Actual
    • P(D);
    • Threat
      • QAR1(I),XP(e)
    • Vars
      • K(f);OGATEB,P-FLIGHT,P_SPINP(c),XP(D)::R(C)
      • Q(a);N_GUARD,SBLOCK,XP(D)::B(H),XB(j)
      • R(d);N_GUARD,XP(D)::QAR1(I),XP(g)
      • S(b);N_GUARD,SBLOCK,XP(D)::S(A)
      • S(h);N_GUARD,SBLOCK,XP(D)::QAR2(I)
      • P(e);XR(F)::QAR1(I)
      • P(e);OGATEB,SBLOCK,XP(D)::R(F)
      • P(g);SBLOCK,XP(D)::QAB(I),XP(i)
      • P(c);EP,XP(D)::P(E),XR(d)
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