MESON Chess Problem Database

Problem Display
PID: 183357 (2K5/4Q1P1/8/3p2q1/1B1R2Pk/4p1pp/1p3R2/8 w - - 0 1)

Dobbs, Gilbert S

British Chess Magazine, 1914

2K5/4Q1P1/8/3p2q1/1B1R2Pk/4p1pp/1p3R2/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qxf6#
    • 1...Qxe7
      • 2.Bxe7#
  • Tries
    • 1.Rf5?
      • threat
        • 2.Qxg5#
      • 1...Qxe7
        • 2.Bxe7#
        • 2.Rh5#
      • 1...g2
        • 2.Be1#
      • 1...Qf6
        • 2.Rh5#
        • 2.Qxf6#
      • 1...h2!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rh6#
      • 1...Qxg4+
        • 2.Rf5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qf4
        • 2.Rfxf4#
      • 1...Qh6
        • 2.Rxh6#
      • 1...Qg6
        • 2.Rxg6#
      • 1...g2
        • 2.Be1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(g);OGATEB::QAB(E),XQ(g)
    • Q(g);N_SPINQ(g),OGATE,XQ(E)::B(B),XQ(g)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAB1(E),XQ(g)
      • Vars
        • P(c);OGATEB::B(B)
      • Refutation
        • P(d);
  • Actual
    • R(A);N_PINQ(g)
    • Threat
      • R(A)
    • Vars
      • Q(g);CHECK,OGATEB,P_SPINQ(g),XP(D)::QAB(E)+R(A)
      • Q(g);CHECK,OGATEB::QAB(E)+R(A),XQ(g)
      • Q(g);OGATE,P_SPINQ(g),XR(A)::QAB(E),XQ(g)
      • Q(g);OGATEB::QAB(E)+R(A),XQ(g)
      • Q(g);::QAB(E)+R(A),DCHECK,XQ(g)
      • P(c);OGATEB::B(B)
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