MESON Chess Problem Database

Problem Display
PID: 66891 (8/6pR/3K3p/4N2k/3p3B/Qp4PB/2b5/3q4 w - - 0 1)

Matthews, CJ

Chess, 1947

8/6pR/3K3p/4N2k/3p3B/Qp4PB/2b5/3q4

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Bxg4#
    • 1...Qa1
      • 2.Bg4#
    • 1...Qb1
      • 2.Bg4#
    • 1...Qc1
      • 2.Bg4#
    • 1...Qe1
      • 2.Bg4#
    • 1...Qf1
      • 2.Bg4#
    • 1...Qg1
      • 2.Bg4#
    • 1...Qh1
      • 2.Bg4#
    • 1...Qd2
      • 2.Bg4#
    • 1...Qd3
      • 2.Bg4#
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qg5#
      • 1...Qxc1
        • 2.Bg4#
      • 1...Bxh7
        • 2.Qxd1#
      • 1...Qg4
        • 2.Bxg4#
      • 1...Qd2
        • 2.Bg4#
      • 1...g5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::B(C),XQ(a)
    • Q(a);N_GUARD::B(C)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(a);N_GUARD,XQ(A)::B(C)
      • B(b);N_GUARD,N_SPINP(f),XR(G)::QAB(A),XQ(a)
      • Q(a);N_GUARD::B(C),XQ(a)
      • Q(a);N_GUARD::B(C)
      • P(g);::QAR1(A),XP(g)
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