MESON Chess Problem Database

Problem Display
PID: 182606 (3n4/1b3N2/2p2p1r/K2k2NB/2p5/4B3/Q7/2b1r2q w - - 0 1)

Marshall, Burney Means

British Chess Magazine, 1913

3n4/1b3N2/2p2p1r/K2k2NB/2p5/4B3/Q7/2b1r2q

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qxg2#
    • 1...Qf3
      • 2.Bxf3#
    • 1...Qg1
      • 2.Bf3#
    • 1...Qh2
      • 2.Bf3#
    • 1...Bd2+
      • 2.Qxd2#
    • 1...Ba3
      • 2.Qd2#
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qd6#
      • 1...Bd2+
        • 2.Qxd2#
      • 1...Qxh2
        • 2.Bf3#
      • 1...Sxf7
        • 2.Bxf7#
      • 1...fxg5
        • 2.Qe5#
      • 1...c3
        • 2.Qa2#
      • 1...Ba3
        • 2.Qd2#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::QAB(A),XQ(c)
    • Q(c);N_GUARD::B(E),XQ(c)
    • Q(c);N_GUARD::B(E)
    • B(a);CHECK,N_GUARD::QAR(A),XB(a)
    • B(a);N_GUARD::QAR(A)
  • Actual
    • Q(A);N_PINP(d)
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::QAR(A),XB(a)
      • Q(c);N_GUARD,XQ(A)::B(E)
      • S(j);OGATE,XS(F)::B(E),XS(j)
      • P(g);N_GUARD,XS(D)::QAR1(A)
      • P(d);OGATEB::QAB(A)
      • B(a);N_GUARD::QAR(A)
      • P(g);N_GUARD::QAR1(A)
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