MESON Chess Problem Database

Problem Display
PID: 135533 (8/8/6K1/6p1/5pkp/6B1/5Q2/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2009

8/8/6K1/6p1/5pkp/6B1/5Q2/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...fxg3
      • 2.Qf5#
  • Tries
    • 1.Bxh4?
      • 1...gxh4
        • 2.Qg2#
      • 1...f3
        • 2.Qg3#
      • 1...Kh3!
    • 1.Qf3+?
      • 1...Kh3
        • 2.Bxf4#
      • 1...Kxf3!
  • Keys
    • 1.Bxf4!
      • 1...Kh3
        • 2.Qf3#
      • 1...gxf4
        • 2.Qg2#
      • 1...h3
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE,SBLOCK,XB(B)::QAB1(A)
  • Tries
    • Try
      • B(B);XP(c)
      • Vars
        • P(d);SBLOCK,XB(B)::QAR2(A)
        • P(a);N_GUARD::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR(A)+B(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • B(B);XP(a)
    • Vars
      • K(b);S_FLIGHT::QAR2(A)
      • P(d);SBLOCK,XB(B)::QAR2(A)
      • P(c);N_GUARD::QAR1(A)
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