MESON Chess Problem Database

Problem Display
PID: 135627 (8/8/4B3/3K4/p1R5/8/kn1Q4/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/8/4B3/3K4/p1R5/8/kn1Q4/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4?
      • threat
        • 2.Qxb2#
      • 1...Ka1
        • 2.Qxb2#
      • 1...Kb1
        • 2.Qxb2#
      • 1...Ka3
        • 2.Qxb2#
      • 1...a3!
  • Keys
    • 1.Kc5!
      • 1...Ka1
        • 2.Rc1#
      • 1...Kb1
        • 2.Rc1#
      • 1...Ka3
        • 2.Rc3#
      • 1...Kb3
        • 2.Rc3#
      • 1...a3
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(A),XS(b)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::QAB1(A),XS(b)
        • K(a);S_FLIGHT::QAR1(A),XS(b)
      • Refutation
        • P(c);
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • K(a);N_SPINS(b),P-FLIGHT::R(B)
      • K(a);N_SPINS(b),S_FLIGHT::R1(B)
      • K(a);N_SPINS(b),S_FLIGHT::B(D)+R(B),DCHECK
      • P(c);SBLOCK::B(D)+R(B)
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