MESON Chess Problem Database

Problem Display
PID: 135253 (8/B1pK4/5p2/1pp1kpn1/1N5Q/5P2/8/8 w - - 0 1)

Borders, Reginald W

The Field, 1915

(First published on Sat Jan 16 1915)

8/B1pK4/5p2/1pp1kpn1/1N5Q/5P2/8/8

#2

5 + 7

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...cxb4
      • 2.Qd4#
    • 1...c4
      • 2.Bd4#
      • 2.Qd4#
    • 1...c6
      • 2.Bb8#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Sd3#
        • 2.Sc6#
        • 2.f4#
      • 1...Sxf3
        • 2.Sd3#
        • 2.Sc6#
      • 1...cxb4
        • 2.Qd4#
        • 2.f4#
      • 1...Se4
        • 2.Sd3#
      • 1...f4
        • 2.Qd5#
        • 2.Qxc5#
      • 1...Sh3
        • 2.Sd3#
        • 2.Sc6#
      • 1...Se6
        • 2.Sd3#
        • 2.Sc6#
      • 1...c6
        • 2.Sd3#
        • 2.Sxc6#
        • 2.Bb8#
        • 2.f4#
      • 1...bxc4!
  • Keys
    • 1.Qf2!
      • 1...Kf4
        • 2.Sd3#
      • 1...Sxf3
        • 2.Qe3#
      • 1...cxb4
        • 2.Qd4#
      • 1...Sh3
        • 2.Qe3#
      • 1...Se4
        • 2.f4#
      • 1...Se6
        • 2.Qe3#
      • 1...Sf7
        • 2.Qe3#
      • 1...Sh7
        • 2.Qe3#
      • 1...c4
        • 2.Qd4#
      • 1...f4
        • 2.Qxc5#
      • 1...c6
        • 2.Bb8#

This anticipates 87436(1950)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,XS(B)::QAB1(C)
    • P(g);OGATEB::B(D)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • S(e);::S(B)
      • Refutation
        • P(a);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(c);S_FLIGHT::S(B)
      • S(e);N_GUARD,XP(A)::QAR2(C)
      • P(b);N_GUARD,XS(B)::QAB1(C)
      • S(e);N_GUARD::QAR2(C)
      • S(e);SBLOCK::P(A)
      • P(b);N_GUARD::QAB1(C)
      • P(d);SBLOCK::QAR2(C),XP(b)
      • P(g);OGATEB::B(D)
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