MESON Chess Problem Database

Problem Display
PID: 187377 (8/8/3b2K1/4p3/4kB2/8/1Q2B3/8 w - - 0 1)

Lincoln, Robert A

Comm., Kozhakina-25 JT, 2016

8/8/3b2K1/4p3/4kB2/8/1Q2B3/8

#2

4 + 3

145 StrateGems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qxe5#
    • 1...Bb4
      • 2.Qxe5#
    • 1...Bc5
      • 2.Qxe5#
    • 1...Be7
      • 2.Qxe5#
    • 1...Bf8
      • 2.Qxe5#
  • Tries
    • 1.Qc2+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxf4!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Bxb4!
    • 1.Qb7+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...Kd4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc4#
      • 1...Kxf4
        • 2.Qf3#
      • 1...Kd5
        • 2.Qc4#
      • 1...exf4
        • 2.Bf3#
      • 1...Bc5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::QAR1(A),XP(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • B(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XB(C)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT,XB(C)::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);SBLOCK,XB(C)::B(B)
      • B(c);N_GUARD::QAR1(A),XP(b)
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