MESON Chess Problem Database

Problem Display
PID: 234668 (1b6/nP1Q4/k7/2B5/K7/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2008

1b6/nP1Q4/k7/2B5/K7/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qxb5#
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qb5#
      • 2.bxc8Q#
      • 2.bxc8B#
  • Tries
    • 1.Qd3+?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Kxb7!
    • 1.Qc7?
      • threat
        • 2.Qb6#
      • 1...Sc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Bxc7!
  • Keys
    • 1.Qc8!
      • 1...Sxc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Bh2
        • 2.b8S#
      • 1...Bg3
        • 2.b8S#
      • 1...Bf4
        • 2.b8S#
      • 1...Be5
        • 2.b8S#
      • 1...Bd6
        • 2.b8S#
      • 1...Bc7
        • 2.b8S#
      • 1...Sb5
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR2(D),XS(b)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(D),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • S(b);OGATE::PXS(b)=Q
      • Refutation
        • B(c);XQ(D)
  • Actual
    • Q(D);
    • Vars
      • S(b);OGATE,XQ(D)::PXS(b)=Q
      • B(c);OGATE::P=S
      • S(b);N_GUARD::QAR2(D)
      • S(b);N_GUARD::QAR2(D),XS(b)
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