MESON Chess Problem Database

Problem Display
PID: 122385 (Q7/1p6/2R1PB2/3b1p2/2P1k3/2Pp2P1/5PK1/8 w - - 0 1)

Philips, Charles W

Toronto Week, 1885

Q7/1p6/2R1PB2/3b1p2/2P1k3/2Pp2P1/5PK1/8

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Rxe6#
  • Tries
    • 1.Qb8?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Bxc4
        • 2.Qe5#
      • 1...f4
        • 2.Qxf4#
        • 2.Qe5#
      • 1...d2!
    • 1.Qd8?
      • threat
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Rxc4#
        • 2.Qd4#
      • 1...Bxc6
        • 2.Qd4#
      • 1...Bxe6
        • 2.Rxe6#
        • 2.Qd4#
      • 1...bxc6!
  • Keys
    • 1.Qxb7!
      • 1...Bxc4
        • 2.Rxc4#
      • 1...Bxc6
        • 2.Qxc6#
      • 1...Bxe6
        • 2.Rxe6#
      • 1...d2
        • 2.Qb1#
      • 1...f4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE,XP(G)::R(F),XB(c)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XP(E)::QAR1(I)
      • Refutation
        • P(a);
    • Try
      • Q(I);
      • Threat
        • QAB1(I),XB(c)
      • Vars
        • B(c);OGATE,XR(F)::QAR1(I)
      • Refutation
        • P(e);XR(F)
  • Actual
    • Q(I);XP(e)
    • Vars
      • B(c);OGATE,XP(E)::QAB(I)+R(F),DCHECK,XB(c)
      • B(c);OGATE,P_SPINB(c),XR(F)::QAB(I),XB(c)
      • B(c);OGATE,XP(G)::QAB(I)+R(F),DCHECK,XB(c)
      • P(a);OGATEB::QAB(I)
      • P(d);OGATEB::QAB(I)
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