MESON Chess Problem Database

Problem Display
PID: 77693 (8/p7/2K5/8/k2P3Q/P4R2/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2007

8/p7/2K5/8/k2P3Q/P4R2/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.d5#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qb4#
        • 2.Qxa7#
      • 1...Ka5
        • 2.Qxa7#
      • 1...a6
        • 2.Qb4#
      • 1...a5!
    • 1.Qh7?
      • threat
        • 2.Qxa7#
      • 1...Ka5
        • 2.Qxa7#
      • 1...a5
        • 2.Qc2#
      • 1...a6!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb4#
      • 1...a5
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR(D)+P(C)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(D),XP(b)
        • P(b);::QAR1(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Threat
        • QAR(D),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(D),XP(b)
        • P(b);SBLOCK::QAB(D)
      • Refutation
        • P(b);
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • P(b);SBLOCK::QAB(D)
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