MESON Chess Problem Database

Problem Display
PID: 23143 (8/8/8/2KR4/4kp2/4P3/3pQ3/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/2KR4/4kp2/4P3/3pQ3/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3
      • 2.Qg4#
    • 1...f3
      • 2.Qd3#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qxf4#
      • 1...fxe3
        • 2.Qf5#
      • 1...f3!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qxf4#
      • 1...Kxe3
        • 2.Re5#
      • 1...fxe3
        • 2.Qf5#
      • 1...f3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,P_SPINP(c),SBLOCK,XP(B)::QAR2(A)
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • P(c);OGATE,SBLOCK,XP(B)::QAB1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(b);P-FLIGHT,XP(B)::R(D)
      • P(c);OGATE,SBLOCK,XP(B)::QAB1(A)
      • P(c);SBLOCK::QAB1(A)
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