MESON Chess Problem Database

Problem Display
PID: 145131 (8/5Q2/1pp5/bNpN4/1pk5/8/8/3B3K w - - 0 1)

Millins, Edward

Boys' Own Paper, 1906

(First published on Fri Feb 23 1906)

8/5Q2/1pp5/bNpN4/1pk5/8/8/3B3K

#2

5 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb5
      • 2.Sc7#
    • 1...b3
      • 2.Be2#
    • 1...cxd5
      • 2.Qf1#
  • Tries
    • 1.Se3+?
      • 1...Kxb5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Sxb4+?
      • 1...Kxb4
        • 2.Qb3#
      • 1...Kxb5!
    • 1.Qf3?
      • threat
        • 2.Be2#
      • 1...cxb5
        • 2.Qe4#
      • 1...Kxb5!
    • 1.Qf4+?
      • 1...Kxb5
        • 2.Sc7#
      • 1...Kxd5
        • 2.Sc7#
      • 1...Kd3!
    • 1.Qf5?
      • 1...cxb5
        • 2.Qe4#
      • 1...cxd5
        • 2.Qf1#
      • 1...b3
        • 2.Be2#
      • 1...Kxb5!
  • Keys
    • 1.Qe6!
      • 1...Kd3
        • 2.Qe2#
      • 1...Kxb5
        • 2.Sc7#
      • 1...cxb5
        • 2.Qe4#
      • 1...cxd5
        • 2.Qe2#
      • 1...b3
        • 2.Be2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XS(C)::S(D)
    • P(a);SBLOCK::B(A)
    • P(f);P_SPINP(f),SBLOCK,XS(D)::QAB(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK,XP(a)
      • Vars
        • K(b);OGATE,P-FLIGHT,XS(D)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Threat
        • B(A)
      • Vars
        • P(f);SBLOCK,XS(C)::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(C)::S(D)
        • K(b);S_FLIGHT,XS(D)::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(f);SBLOCK,XS(C)::QAR2(E)
        • P(f);SBLOCK,XS(D)::QAB(E)
        • P(a);SBLOCK::B(A)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);S_FLIGHT,XS(C)::S(D)
      • P(f);SBLOCK,XS(C)::QAR2(E)
      • P(f);P_SPINP(f),SBLOCK,XS(D)::QAB(E)
      • P(a);SBLOCK::B(A)
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