MESON Chess Problem Database

Problem Display
PID: 210737 (8/5N2/3Npp2/n5q1/1P1kP1p1/6P1/nPQp1P2/3K4 w - - 0 1)

Foster, Geoffrey R

The Problemist, 1985

8/5N2/3Npp2/n5q1/1P1kP1p1/6P1/nPQp1P2/3K4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sb5#
    • 1...Qf4
      • 2.Sb5#
    • 1...Qh4
      • 2.Sb5#
      • 2.Qxd2#
    • 1...Qh6
      • 2.Sb5#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qc5
      • 2.Qxd2#
    • 1...Qd5
      • 2.Qxd2#
    • 1...Qe5
      • 2.Qxd2#
    • 1...Qf5
      • 2.Qxd2#
    • 1...Qh5
      • 2.Qxd2#
    • 1...Qg6
      • 2.Sb5#
      • 2.Qxd2#
    • 1...Qg7
      • 2.Sb5#
      • 2.Qxd2#
    • 1...Qg8
      • 2.Sb5#
      • 2.Qxd2#
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3+
      • 2.Qxc3#
      • 2.bxc3#
    • 1...Sxb4
      • 2.Qc3#
    • 1...Sb3
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Qc4#
    • 1...Sb7
      • 2.Qc4#
    • 1...e5
      • 2.Sb5#
    • 1...f5
      • 2.Sb5#
  • Tries
    • 1.bxa5?
      • threat
        • 2.Qc4#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qc5
        • 2.Qxd2#
      • 1...Qd5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc5#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Kxe5
        • 2.Qc5#
      • 1...Qxe5
        • 2.Qxd2#
      • 1...Sxb4
        • 2.Qc3#
      • 1...fxe5
        • 2.Sb5#
      • 1...Sb3
        • 2.Sc6#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(f);N_GUARD::S(H)
    • Q(f);N_GUARD::S(H),XQ(f)
    • Q(f);N_GUARD::QAR2(C),XP(b)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD,XP(F)::QAB1(C)
    • S(e);N_GUARD::QAR1(C)
    • S(e);N_GUARD::QAR1(C),XS(e)
    • P(g);S_CUTQ(f)::S(H)
    • P(h);S_CUTQ(f)::S(H)
  • Tries
    • Try
      • P(F);XS(e)
      • Threat
        • QAR1(C)
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
        • Q(f);N_GUARD::S(H),XQ(f)
        • Q(f);N_GUARD,SBLOCK::QAR2(C),XP(b)
      • Refutation
        • Q(f);
  • Actual
    • S(I);
    • Threat
      • QAB1(C)
    • Vars
      • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
      • K(c);S_FLIGHT,XS(I)::QAR2(C)
      • Q(f);N_GUARD,SBLOCK,XS(I)::QAR2(C),XP(b)
      • S(a);N_GUARD,XP(F)::QAB1(C)
      • P(h);SBLOCK,XS(I)::S(H)
      • S(e);N_GUARD::S(I)
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