MESON Chess Problem Database

Problem Display
PID: 228261 (8/1P5q/2p1pQ2/pp6/kP2B2R/8/K2b4/8 w - - 0 1)

Howard, David M

Problem Observer, 2019

8/1P5q/2p1pQ2/pp6/kP2B2R/8/K2b4/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb4
      • 2.Qd4#
    • 1...Qg8
      • 2.Bc2#
    • 1...Qh5
      • 2.Bc2#
    • 1...Qh6
      • 2.Bc2#
    • 1...Qxb7
      • 2.Bc2#
    • 1...Qc7
      • 2.Bc2#
    • 1...Qd7
      • 2.Bc2#
    • 1...Qe7
      • 2.Bc2#
    • 1...Qf7
      • 2.Bc2#
    • 1...Qg7
      • 2.Bc2#
    • 1...Qh8
      • 2.Bc2#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qa3#
        • 2.Qb3#
      • 1...Bxb4
        • 2.Qc2#
        • 2.Qb3#
      • 1...Bc1
        • 2.Qb3#
      • 1...axb4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxa5#
      • 1...Kxb4
        • 2.Qd4#
      • 1...Bxb4
        • 2.Qd1#
      • 1...axb4
        • 2.Qa8#
      • 1...Qc7
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(E)
    • Q(g);N_GUARD::B(C)
    • Q(g);N_GUARD,XP(F)::B(C)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(E)
      • Refutation
        • P(c);XP(B)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(c)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(E)
      • B(a);OGATE,SBLOCK,XP(B)::QAB(E)
      • P(c);OGATEB,SBLOCK,XP(B)::QAR(E)
      • Q(g);N_GUARD::B(C)
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