MESON Chess Problem Database

Problem Display
PID: 142223 (5Q2/8/q2p4/pN4p1/1p1nk3/6B1/B1PP2K1/6b1 w - - 0 1)

Lane, Henry Fitzgerald William

British Chess Magazine, 1907

5Q2/8/q2p4/pN4p1/1p1nk3/6B1/B1PP2K1/6b1

#2

7 + 8

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Sxd6#
    • 1...Qc8
      • 2.Sxd6#
    • 1...Qa7
      • 2.Sxd6#
    • 1...Qa8
      • 2.Sxd6#
    • 1...Be3
      • 2.d3#
    • 1...Sxc2
      • 2.Qf3#
    • 1...Se2
      • 2.Qf3#
    • 1...Sb3
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sc6
      • 2.Qf3#
    • 1...Se6
      • 2.Qf3#
    • 1...b3
      • 2.Sc3#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Qe7+?
      • 1...Se6
        • 2.Qxe6#
        • 2.Qh7#
      • 1...Kf5!
    • 1.Qf1?
      • threat
        • 2.Qd3#
      • 1...Sxc2
        • 2.Qf3#
      • 1...b3
        • 2.Sc3#
      • 1...Se2
        • 2.Qf3#
      • 1...Qxb5!
    • 1.Qe8+?
      • 1...Se6
        • 2.Qg6#
        • 2.Qxe6#
      • 1...Kf5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qg4#
      • 1...Qxc8
        • 2.Sxd6#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...b3
        • 2.Sc3#
      • 1...Be3
        • 2.d3#
      • 1...Se2
        • 2.Qe6#
      • 1...Sf5
        • 2.Qe6#
      • 1...g4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD::S(F),XP(h)
    • B(a);SBLOCK::P(C)
    • S(c);N_GUARD,XP(B)::QAB1(G)
    • S(c);N_GUARD::QAB1(G)
    • S(c);N_GUARD::QAB1(G),XS(c)
    • P(b);N_GUARD::S(F)
    • P(f);N_GUARD::QAR1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(c);N_GUARD,XP(B)::QAB1(G)
        • P(b);N_GUARD::S(F)
        • S(c);N_GUARD::QAB1(G)
      • Refutation
        • Q(g);XS(F)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • Q(g);N_GUARD,XQ(G)::S(F),XP(h)
      • S(c);OGATE,XP(B)::QAB(G),XS(c)
      • S(c);N_GUARD::QAR2(G)
      • S(c);N_GUARD::QAR2(G),XS(c)
      • P(b);N_GUARD::S(F)
      • B(a);SBLOCK::P(C)
      • P(f);::QAR2(G),XP(f)
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