MESON Chess Problem Database

Problem Display
PID: 208066 (8/2p1R2p/8/1q3p2/3ppk2/1Q3b1P/3N1BPK/8 w - - 0 1)

Lacy, Richard

Dubuque Chess Journal, 1874

8/2p1R2p/8/1q3p2/3ppk2/1Q3b1P/3N1BPK/8

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qg3#
    • 1...Be2
      • 2.Qg3#
    • 1...Bxg2
      • 2.Qg3#
    • 1...Bh5
      • 2.Qg3#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Bg3#
        • 2.Qxf3#
        • 2.g3#
      • 1...Qxb3
        • 2.g3#
      • 1...Bxg2
        • 2.Bg3#
        • 2.Qg3#
      • 1...Bxe4
        • 2.Qg3#
      • 1...Qe5
        • 2.Qxf3#
      • 1...Qe2
        • 2.Bg3#
        • 2.g3#
      • 1...Qd3
        • 2.g3#
      • 1...Bd1
        • 2.Bg3#
        • 2.Qg3#
        • 2.g3#
      • 1...Be2
        • 2.Bg3#
        • 2.Qg3#
        • 2.g3#
      • 1...Bg4
        • 2.Bg3#
        • 2.Qg3#
        • 2.g3#
      • 1...Bh5
        • 2.Bg3#
        • 2.Qg3#
        • 2.g3#
      • 1...d3
        • 2.g3#
      • 1...fxe4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg3#
        • 2.g3#
      • 1...Bxg2
        • 2.Qg3#
      • 1...Bg4
        • 2.g3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);OGATE::QAB1(E)
    • B(a);OGATE,XP(C)::QAB1(E)
  • Tries
    • Try
      • S(A);XP(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(e);XQ(E)::P(C)
        • B(a);OGATE,XS(A)::QAB1(E)
        • Q(e);::QAR1(E),XB(a)
        • Q(e);::P(C)
        • P(b);::P(C)
      • Refutation
        • P(f);XS(A)
  • Actual
    • Q(E);
    • Threat
      • DUALS(2)
    • Vars
      • B(a);XP(C)::QAB1(E)
      • B(a);::P(C)
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