MESON Chess Problem Database

Problem Display
PID: 182609 (Q7/8/8/8/4R1pr/2p4k/8/6K1 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2015

Q7/8/8/8/4R1pr/2p4k/8/6K1

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qg2#
        • 2.Qh2#
      • 1...Kg3
        • 2.Qg2#
      • 1...Rh5
        • 2.Qh2#
      • 1...Rh6
        • 2.Qh2#
      • 1...Rh7
        • 2.Qh2#
      • 1...Rh8
        • 2.Qh2#
      • 1...g3
        • 2.Qg2#
      • 1...c2!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Re3#
      • 1...Kg3
        • 2.Qxc3#
      • 1...Rh5
        • 2.Qxg4#
      • 1...Rh6
        • 2.Qxg4#
      • 1...Rh7
        • 2.Qxg4#
      • 1...Rh8
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • R(d);::QAR1(C)
        • P(c);::QAB1(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);P_PINP(c)
    • Threat
      • R(B)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAR(C),XP(a)
      • R(d);N_GUARD::QAB1(C),XP(c)
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