MESON Chess Problem Database

Problem Display
PID: 96635 (5R2/4p1rB/2qP1bb1/Q5Np/3pP2P/1Ppk4/7R/5KB1 w - - 0 1)

Philips, Charles W

Canadian Chess Problems, 1890

5R2/4p1rB/2qP1bb1/Q5Np/3pP2P/1Ppk4/7R/5KB1

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qb5#
      • 2.Qa6#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qa8
      • 2.Qb5#
    • 1...Qa6
      • 2.Qxa6#
    • 1...Qxd6
      • 2.Qb5#
    • 1...Be5
      • 2.Rf3#
    • 1...c2
      • 2.Rd2#
      • 2.Rh3#
      • 2.Qd2#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Rh3#
        • 2.Qc2#
        • 2.Qe2#
      • 1...Qxe4
        • 2.Qc2#
        • 2.Qa6#
      • 1...Qxd6
        • 2.Qc2#
        • 2.Qe2#
      • 1...Bxg5
        • 2.Qc2#
        • 2.Qe2#
      • 1...Qd7
        • 2.Qc2#
        • 2.Qe2#
      • 1...Qc8
        • 2.Qc2#
        • 2.Qe2#
      • 1...Be5
        • 2.Rf3#
        • 2.Qc2#
        • 2.Qe2#
      • 1...Bf5
        • 2.Qc2#
        • 2.Qe2#
      • 1...c2!
    • 1.Qb5+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qxb5!
    • 1.Qa6+?
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qxa6!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qg3#
      • 1...Qxe4
        • 2.Qb5#
      • 1...Qxd6
        • 2.Qb5#
      • 1...Bxe5
        • 2.Rf3#
      • 1...Bxg5
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::QAB(G),XQ(e)
    • Q(e);N_GUARD::QAB(G)
    • Q(e);N_GUARD,XP(I)::QAB(G)
    • B(f);OGATE::R(K)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Refutation
        • P(a);
    • Try
      • Q(G);CHECK
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::QAB1(G),XQ(e)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::QAB(G),XQ(e)
        • Q(e);N_GUARD,P_SPINQ(e)::QAB1(G),XQ(e)
      • Refutation
        • Q(e);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • Q(e);N_GUARD,XP(E)::QAB(G)
      • Q(e);N_GUARD,XP(I)::QAB(G)
      • B(f);OGATE,XQ(G)::R(K)
      • B(f);N_GUARD,XS(H)::QAR1(G),XP(c)
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