MESON Chess Problem Database

Problem Display
PID: 234453 (3R4/3p4/K1k2p2/8/8/8/7Q/n7 w - - 0 1)

Lincoln, Robert A

ChessStar, 2013

3R4/3p4/K1k2p2/8/8/8/7Q/n7

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qd6#
    • 1...d6
      • 2.Qxd6#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Rc8#
      • 1...d5
        • 2.Qc3#
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...fxe5!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Rc8#
      • 1...Kc5
        • 2.Rc8#
      • 1...Kc7
        • 2.Qxd7#
      • 1...d5
        • 2.Qc3#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);::QAR1(A)
    • P(d);::QAR1(A),XP(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Vars
        • P(d);::QAR1(A),XP(d)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R(C)
    • Vars
      • K(b);P-FLIGHT::R(C)
      • K(b);P-FLIGHT::QAR1(A),XP(d)
      • P(d);::QAR(A)
      • P(d);::QAR1(A),XP(d)
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