MESON Chess Problem Database

Problem Display
PID: 144476 (b2rN3/1k1PNQ2/8/8/2B1K3/8/5B2/8 w - - 0 1)

Francey, James

Falkirk Herald, 0000

b2rN3/1k1PNQ2/8/8/2B1K3/8/5B2/8

#2

7 + 3

14867 BCPS Library 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Qd5#
    • 1...Rc8
      • 2.dxc8Q#
  • Tries
    • 1.Bd5+?
      • 1...Kb8
        • 2.Qf4#
      • 1...Ka6!
    • 1.Qf6?
      • threat
        • 2.Qb2#
        • 2.Qb6#
      • 1...Rxe8
        • 2.Qb6#
      • 1...Kb8+!
  • Keys
    • 1.Sc6!
      • 1...Rxe8+
        • 2.dxe8Q#
      • 1...Kxc6
        • 2.Qd5#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Rb8
        • 2.Sa5#
      • 1...Rc8
        • 2.d8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAB(F)
    • R(c);OGATE::PXR(c)=Q
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);P-FLIGHT,P_PINB(B)::QAB(F)
      • Refutation
        • K(a);P_PINB(B),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_PINS(E),XS(G)::QAR1(F)
      • Refutation
        • K(a);CHECK,P-FLIGHT
  • Actual
    • S(E);
    • Vars
      • R(c);CHECK,OGATE,XS(G)::PXR(c)=Q
      • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(F)
      • R(c);OGATE,P_SPINR(c),XP(D)::QAR2(F),XR(c)
      • R(c);SBLOCK::S(E)
      • R(c);OGATE,SBLOCK::P=S
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