MESON Chess Problem Database

Problem Display
PID: 153198 (7n/6R1/8/6pk/2Q5/8/7K/3b4 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

7n/6R1/8/6pk/2Q5/8/7K/3b4

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Rh7#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rh7#
        • 2.Qh3#
      • 1...Kh4
        • 2.Qh3#
      • 1...Sg6
        • 2.Rh7#
      • 1...Bc2
        • 2.Qh3#
      • 1...Bg4
        • 2.Rh7#
      • 1...Sf7
        • 2.Qh3#
      • 1...g4!
    • 1.Qe4?
      • threat
        • 2.Rh7#
      • 1...Kh6
        • 2.Rh7#
        • 2.Qh7#
      • 1...g4
        • 2.Qh7#
      • 1...Sf7!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qh3#
      • 1...Kh4
        • 2.Qh3#
      • 1...Kh6
        • 2.Qxh8#
      • 1...Sg6
        • 2.Rh7#
      • 1...Bg4
        • 2.Qxh8#
      • 1...g4
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::R(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • S(d);::R(C)
        • B(a);::QAR2(B)
        • B(a);::R(C)
        • S(d);::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • R(C)
      • Vars
        • P(b);::QAR2(B)
      • Refutation
        • S(d);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • K(c);P-FLIGHT::QAR2(B),XS(d)
      • S(d);SBLOCK::R(C)
      • B(a);SBLOCK::QAR(B),XS(d)
      • P(b);::QAR(B),XS(d)
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