MESON Chess Problem Database

Problem Display
PID: 67763 (B7/p7/8/1k6/2RK1B2/8/8/5Q2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2006

B7/p7/8/1k6/2RK1B2/8/8/5Q2

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Bc7?
      • 1...Ka6
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc5#
        • 2.Rc6#
      • 1...a6
        • 2.Bc6#
        • 2.Qb1#
        • 2.Qf5#
      • 1...a5!
    • 1.Ra4+?
      • 1...Kb6
        • 2.Ra6#
        • 2.Qa6#
        • 2.Qb1#
      • 1...Kxa4!
    • 1.Rb4+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Kxb4!
    • 1.Qb1+?
      • 1...Ka6
        • 2.Ra4#
      • 1...Ka5!
  • Keys
    • 1.Bd2!
      • 1...Ka6
        • 2.Rc6#
      • 1...Kb6
        • 2.Rc6#
      • 1...a5
        • 2.Rb4#
      • 1...a6
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);S_FLIGHT::QAB(A)+R(B),DCHECK
      • K(a);P-FLIGHT::R1(B)
      • P(b);SBLOCK::QAB(A)+R(B),DCHECK
      • P(b);SBLOCK::QAR(A)
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