MESON Chess Problem Database

Problem Display
PID: 145071 (5B2/5B2/1P2N2R/nR6/2k4P/3p1p2/n4K2/1N3Q2 w - - 0 1)

Mackenzie, Arthur Ford

Illustrated American, 1890-1891

5B2/5B2/1P2N2R/nR6/2k4P/3p1p2/n4K2/1N3Q2

#2

10 + 5

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sa3#
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.Qxd3#
      • 1...Kxb5!
    • 1.Sc5+?
      • 1...Kd4
        • 2.Bg7#
      • 1...Kxb5!
    • 1.Sg5+?
      • 1...Kd4
        • 2.Bg7#
        • 2.Rd6#
      • 1...Kxb5!
    • 1.Qe1?
      • threat
        • 2.Sa3#
      • 1...Sb4
        • 2.Qxb4#
      • 1...d2
        • 2.Qf1#
      • 1...Kxb5!
  • Keys
    • 1.Qd1!
      • 1...Kxb5
        • 2.Sc7#
      • 1...d2
        • 2.Qf1#
      • 1...Sc1
        • 2.Qa4#
      • 1...Sc3
        • 2.Sa3#
      • 1...Sb4
        • 2.Rc5#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sc6
        • 2.Qb3#
      • 1...Sb7
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT::B(J)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • S(G);CHECK
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • S(A)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(b);OGATEB::QAB(B)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
  • Actual
    • Q(B);N_PINP(b)
    • Vars
      • K(d);S_FLIGHT,XR(E)::S(G)
      • P(b);OGATEB::QAB(B)
      • S(a);N_GUARD::QAR2(B)
      • S(a);SBLOCK::S(A)
      • S(a);SBLOCK::R1(E)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(e);N_GUARD::QAB1(B)
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