MESON Chess Problem Database

Problem Display
PID: 118809 (3N4/2pp4/5R2/2pk4/3P1p2/1P3K2/8/6Q1 w - - 0 1)

Taverner, Thomas

Montreal Gazette, 1896

3N4/2pp4/5R2/2pk4/3P1p2/1P3K2/8/6Q1

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxd4
      • 2.Qg5#
    • 1...d6
      • 2.Rf5#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Se7#
        • 2.Qg5#
        • 2.Qg8#
      • 1...cxd4
        • 2.Qxd4#
        • 2.Qg5#
      • 1...d6
        • 2.Se7#
      • 1...dxc6!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...cxd4
        • 2.Qf5#
      • 1...Kxd4!
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...cxd4
        • 2.Rf5#
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Kxd4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxd7#
      • 1...Kxd4
        • 2.Rd6#
      • 1...cxd4
        • 2.Qg5#
      • 1...d6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(D)::QAR(A)
    • P(e);SBLOCK::R(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);::S(F)
      • Refutation
        • P(e);XS(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);SBLOCK,XP(D)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A),XP(e)
    • Vars
      • K(c);P-FLIGHT,XP(D)::QAB(A)+R(E),DCHECK
      • P(b);SBLOCK,XP(D)::QAR(A)
      • P(e);SBLOCK::R(E)
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