MESON Chess Problem Database

Problem Display
PID: 194467 (b4NK1/2Q5/p3pb2/5p1n/1R1pk3/8/B3PP2/5n2 w - - 0 1)

Shire, David J

British Chess Magazine, 2019

b4NK1/2Q5/p3pb2/5p1n/1R1pk3/8/B3PP2/5n2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Bb1#
    • 1...Se3
      • 2.f3#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Sc5#
      • 1...Be5
        • 2.Qc2#
      • 1...Be7
        • 2.Rxd4#
      • 1...Bd5
        • 2.Bb1#
      • 1...f4!
    • 1.Sd7?
      • threat
        • 2.Sc5#
      • 1...Be5
        • 2.Qxe5#
      • 1...f4
        • 2.Qc2#
      • 1...Be7
        • 2.Qe5#
      • 1...e5!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qc2#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Se3
        • 2.f3#
      • 1...Sf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(i);SBLOCK::B(A)
    • S(a);SBLOCK::P(C)
  • Tries
    • Try
      • S(F);XP(g)
      • Threat
        • S(F)
      • Vars
        • B(h);SBLOCK::QAB(E)
        • B(h);N_GUARD::R1(D),XP(b)
        • B(i);P_PINS(F),SBLOCK::B(A)
      • Refutation
        • P(d);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • B(h);N_GUARD::QAR1(E),XB(h)
        • P(d);SBLOCK::QAB(E)
        • B(h);N_GUARD::QAR1(E)
      • Refutation
        • P(g);
  • Actual
    • S(F);
    • Threat
      • QAB(E)
    • Vars
      • B(i);N_GUARD::QAB(E),XB(i)
      • S(a);SBLOCK::P(C)
      • S(e);N_GUARD::QAR1(E),XS(e)
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