MESON Chess Problem Database

Problem Display
PID: 23161 (8/8/7K/7R/5pk1/4Q3/8/5b2 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/7K/7R/5pk1/4Q3/8/5b2

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Qh3#
    • 1...Bd3
      • 2.Qh3#
    • 1...Bh3
      • 2.Qxh3#
    • 1...Bc4
      • 2.Qh3#
    • 1...Bb5
      • 2.Qh3#
    • 1...Ba6
      • 2.Qh3#
    • 1...f3
      • 2.Qg5#
  • Tries
    • 1.Rh4+?
      • 1...Kf5
        • 2.Rxf4#
      • 1...Kxh4!
    • 1.Qg1+?
      • 1...Bg2
        • 2.Qxg2#
      • 1...Kf3!
  • Keys
    • 1.Qf2!
      • 1...f3
        • 2.Qh4#
      • 1...Be2
        • 2.Qg2#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bd3
        • 2.Qg2#
      • 1...Bh3
        • 2.Rg5#
      • 1...Bc4
        • 2.Qg2#
      • 1...Bb5
        • 2.Qg2#
      • 1...Ba6
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • P(b);OGATE,SBLOCK::QAR1(A)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::R1(B),XP(b)
      • Refutation
        • K(c);P-FLIGHT,XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • P(b);SBLOCK::QAR1(A)
      • B(a);N_GUARD::QAR2(A)
      • B(a);N_GUARD::QAR2(A),XB(a)
      • B(a);SBLOCK::R1(B)
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Developed and maintained by Brian Stephenson.
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