MESON Chess Problem Database

Problem Display
PID: 187048 (2N4B/8/p6p/npk5/6R1/3B1Q2/1N2K3/8 w - - 0 1)

Shire, David J

The Problemist Supplement, 2018

2N4B/8/p6p/npk5/6R1/3B1Q2/1N2K3/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Sa4#
      • 2.Bd4#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Sd3#
      • 1...Kb4
        • 2.Qf8#
      • 1...bxc4!
    • 1.Bxb5?
      • threat
        • 2.Qf5#
      • 1...Kxb5
        • 2.Qd5#
      • 1...axb5
        • 2.Sd3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc4!
    • 1.Qf8+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kc6!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qf8#
      • 1...Kb4
        • 2.Qc3#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sc6
        • 2.Qc3#
      • 1...Sb7
        • 2.Qc3#
      • 1...b4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • S(A)
      • Vars
        • K(c);S_FLIGHT::QAB(D)
      • Refutation
        • P(b);XB(C)
    • Try
      • B(C);XP(b)
      • Threat
        • QAR(D)
      • Vars
        • K(c);P-FLIGHT,XB(C)::QAR2(D)
        • P(d);SBLOCK,XB(C)::S(A)
        • S(a);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB(D)
    • Vars
      • K(c);S_FLIGHT::QAB1(D)
      • S(a);SBLOCK::S(A)
      • S(a);N_GUARD::QAR2(D)
      • P(b);SBLOCK::QAR(D)
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