MESON Chess Problem Database

Problem Display
PID: 142559 (1bQ3b1/p6p/8/8/N1N5/n2k4/P6n/3K2B1 w - - 0 1)

Doyle, Hugh

British Chess Magazine, 1891

1bQ3b1/p6p/8/8/N1N5/n2k4/P6n/3K2B1

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4
      • 2.Qf5#
    • 1...Sxc4
      • 2.Qf5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sb2#
        • 2.Qf5#
        • 2.Qc3#
      • 1...Be5
        • 2.Qf5#
      • 1...Bc7
        • 2.Qf5#
      • 1...Bc4
        • 2.Qf5#
      • 1...Bd5
        • 2.Sb2#
        • 2.Qc3#
      • 1...Be6
        • 2.Sb2#
        • 2.Qc3#
      • 1...Sb1
        • 2.Sb2#
        • 2.Qf5#
        • 2.Qc2#
      • 1...Sc4
        • 2.Qf5#
      • 1...Sb5
        • 2.Sb2#
        • 2.Qf5#
        • 2.Qc2#
      • 1...Bb3+!
    • 1.Qg4?
      • threat
        • 2.Scb2#
        • 2.Qe2#
        • 2.Qd4#
      • 1...Bxc4
        • 2.Qe2#
        • 2.Qf5#
        • 2.Qd4#
      • 1...Sxc4
        • 2.Qe2#
        • 2.Qf5#
        • 2.Qd4#
      • 1...Bf4
        • 2.Qe2#
      • 1...Be5
        • 2.Sxe5#
        • 2.Qe2#
      • 1...Sf3
        • 2.Scb2#
      • 1...Sc2
        • 2.Scb2#
        • 2.Qe2#
      • 1...Sb5
        • 2.Scb2#
        • 2.Qe2#
      • 1...Sxg4!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Scb2#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Bxc4
        • 2.Qxh7#
      • 1...Sxc4
        • 2.Qb1#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Be5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK,XS(E)::QAB(F)
    • S(b);SBLOCK,XS(E)::QAB(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);::QAB(F)
        • B(g);::QAB(F)
        • S(b);::QAB(F)
      • Refutation
        • B(g);CHECK
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);::QAB1(F)
        • S(a);::S(E)
      • Refutation
        • S(a);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT,XS(E)::QAB1(F)
      • B(g);N_GUARD,SBLOCK,XS(E)::QAB(F),XP(e)
      • S(b);N_GUARD,SBLOCK,XS(E)::QAB(F)
      • B(g);N_GUARD::QAR2(F),XB(g)
      • B(f);N_GUARD::S(E),XB(f)
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