MESON Chess Problem Database

Problem Display
PID: 39779 (8/8/2R3K1/3p4/3kp3/3P4/4Q3/8 w - - 0 1)

Lincoln, Robert A

More Fun with Chess Miniatures, 2000

8/8/2R3K1/3p4/3kp3/3P4/4Q3/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kf5?
      • 1...exd3
        • 2.Qf2#
        • 2.Qe5#
      • 1...e3!
    • 1.Kf6?
      • 1...exd3
        • 2.Qe5#
      • 1...e3!
    • 1.Qe3+?
      • 1...Ke5
        • 2.d4#
      • 1...Kxe3!
  • Keys
    • 1.Qd2!
      • 1...Ke5
        • 2.d4#
      • 1...exd3
        • 2.Qf4#
      • 1...e3
        • 2.Qc3#

This anticipates 234490(2020)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Refutation
        • P(b);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);OGATE,SBLOCK,XP(B)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P_SPINP(b),S_FLIGHT::P(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATE,S_FLIGHT::P(B)
      • P(b);OGATEB,P_SPINP(b),SBLOCK,XP(B)::QAR2(A)
      • P(b);SBLOCK::QAB1(A)
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