MESON Chess Problem Database

Problem Display
PID: 103109 (3B4/7K/8/1Q3r1k/8/5q1P/8/5B2 w - - 0 1)

Lemarcis, N

Canadian Chess Chat, 1980

3B4/7K/8/1Q3r1k/8/5q1P/8/5B2

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxf5#
    • 1...Qh1
      • 2.Qxf5#
    • 1...Qe2
      • 2.Bxe2#
      • 2.Qxf5#
    • 1...Qc6
      • 2.Qxf5#
    • 1...Qa8
      • 2.Qxf5#
    • 1...Qa3
      • 2.Qxf5#
    • 1...Qb3
      • 2.Qxf5#
    • 1...Qc3
      • 2.Qxf5#
    • 1...Rg5
      • 2.Qxg5#
  • Keys
    • 1.Be2!
      • threat
        • 2.Bxf3#
        • 2.Qxf5#
      • 1...Qxe2
        • 2.Qxf5#
      • 1...Rxb5
        • 2.Bxf3#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Qg4
        • 2.Bxg4#
        • 2.Qxf5#
        • 2.hxg4#
      • 1...Rc5
        • 2.Bxf3#
        • 2.Qe8#
        • 2.Qxc5#
      • 1...Rd5
        • 2.Bxf3#
        • 2.Qe8#
        • 2.Qxd5#
      • 1...Re5
        • 2.Bxf3#
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAR2(C),XR(b)
    • R(b);OGATE::QAR1(C),XR(b)
  • Actual
    • B(A);P_PINQ(a)
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);N_SPINQ(a),XB(A)::QAR2(C),XR(b)
      • R(b);N_SPINR(b),XQ(C)::B(A),XQ(a)
      • R(b);OGATE::QAR1(C),XR(b)
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