MESON Chess Problem Database

Problem Display
PID: 103127 (7K/pp1B4/b7/kq1RN3/3P4/6B1/8/1NQ5 w - - 0 1)

Maguire, Elihu S

Franklin Chess Club, 1893

7K/pp1B4/b7/kq1RN3/3P4/6B1/8/1NQ5

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa3#
    • 1...Kb4
      • 2.Qa3#
    • 1...b6
      • 2.Qa3#
  • Tries
    • 1.Sc4+?
      • 1...Ka4
        • 2.Qa3#
      • 1...Kb4!
    • 1.Be1+?
      • 1...Ka4
        • 2.Qa3#
        • 2.Qd1#
        • 2.Qc2#
        • 2.Qc4#
      • 1...Kb6!
    • 1.Bxb5?
      • 1...Kb4
        • 2.Qa3#
        • 2.Qc3#
      • 1...Kb6
        • 2.Sc4#
      • 1...b6
        • 2.Sc6#
        • 2.Be1#
        • 2.Qd2#
        • 2.Qa3#
        • 2.Qe1#
        • 2.Qc3#
      • 1...Bxb5!
    • 1.Rxb5+?
      • 1...Ka4
        • 2.Sc3#
        • 2.Qa3#
        • 2.Qd1#
        • 2.Qc2#
        • 2.Qc4#
      • 1...Bxb5!
    • 1.Qc3+?
      • 1...Ka4
        • 2.Qa3#
      • 1...Kb6!
    • 1.Qc5?
      • 1...Ka4
        • 2.Qa3#
      • 1...b6
        • 2.Qa3#
      • 1...Qxc5!
  • Keys
    • 1.Qb2!
      • 1...Ka4
        • 2.Qa3#
      • 1...Kb6
        • 2.Sc4#
      • 1...Qxd5
        • 2.Be1#
      • 1...Qc5
        • 2.Be1#
      • 1...b6
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(B)
    • K(a);N_SPINQ(b),S_FLIGHT::QAB1(B)
    • P(e);SBLOCK::QAR2(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
    • Try
      • B(C);CHECK
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
    • Try
      • B(G);XQ(b)
      • Vars
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • B(c);P_SPINB(c),XB(G)
    • Try
      • R(E);CHECK,XQ(b)
      • Refutation
        • B(c);XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(e);SBLOCK::QAR2(B)
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::S(F)
      • Q(b);N_SPINQ(b),XR(E)::B(C)
      • Q(b);::B(C)
      • P(e);SBLOCK::QAR2(B)
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