MESON Chess Problem Database

Problem Display
PID: 87527 (8/4N3/2P2N1p/4k3/7K/1R6/BpR5/1Q6 w - - 0 1)

Gill, JJ

The Problemist, 1967

8/4N3/2P2N1p/4k3/7K/1R6/BpR5/1Q6

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxb2#
  • Tries
    • 1.Qe1+?
      • 1...Kd4
        • 2.Sf5#
        • 2.Qc3#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kf4
        • 2.Sfd5#
        • 2.Sh5#
        • 2.Rf2#
        • 2.Rc4#
        • 2.Qg3#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kd6
        • 2.Se8#
      • 1...Kxf6!
  • Keys
    • 1.Re3+!
      • 1...Kd4
        • 2.Sf5#
      • 1...Kf4
        • 2.Sfd5#
      • 1...Kd6
        • 2.Se8#
      • 1...Kxf6
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(A),XP(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(G)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
  • Actual
    • R(D);CHECK
    • Vars
      • K(b);S_FLIGHT::S(H)
      • K(b);S_FLIGHT::S(G)
      • K(b);S_FLIGHT,XS(G)::QAB(A),XP(a)
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