MESON Chess Problem Database

Problem Display
PID: 166423 (8/1p6/8/8/kPQB4/b7/K7/8 w - - 0 1)

Lincoln, Robert A

Chess Life, 1997

8/1p6/8/8/kPQB4/b7/K7/8

#2

4 + 3

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qb3#
  • Tries
    • 1.Bb6?
      • 1...Bc1
        • 2.b5#
      • 1...Bb2
        • 2.b5#
      • 1...Bxb4!
  • Keys
    • 1.Bc3!
      • 1...Bxb4
        • 2.Qxb4#
      • 1...Bc1
        • 2.b5#
      • 1...Bb2
        • 2.b5#
      • 1...b5
        • 2.Qb3#
      • 1...b6
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • B(D);
      • Vars
        • B(a);N_GUARD::QAR(C)+P(B)
      • Refutation
        • B(a);P_SPINB(a),XP(B)
  • Actual
    • B(D);
    • Vars
      • B(a);OGATE,P_SPINB(a),XP(B)::QAR1(C),XB(a)
      • B(a);N_GUARD::QAR(C)+P(B)
      • P(c);SBLOCK::QAB1(C)
      • P(c);N_GUARD::QAR2(C)
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Developed and maintained by Brian Stephenson.
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