MESON Chess Problem Database

Problem Display
PID: 194468 (4Q2K/3n3p/2p5/1r1p1B1R/3N1k2/3p1p1R/2nN4/7b w - - 0 1)

Shire, David J

British Chess Magazine, 2019

4Q2K/3n3p/2p5/1r1p1B1R/3N1k2/3p1p1R/2nN4/7b

#2

7 + 10

SOLUTION

  • SOUND
  • Tries
    • 1.Sf1?
      • threat
        • 2.R3h4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se5
        • 2.Se6#
      • 1...Sf6!
    • 1.S2xf3?
      • threat
        • 2.R5h4#
      • 1...Bxf3
        • 2.Rxf3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Se3
        • 2.Se6#
      • 1...Sf6
        • 2.Qe5#
      • 1...Sxd4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se6#
      • 1...Sxd4
        • 2.Qe3#
      • 1...dxc4
        • 2.Qe4#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sf8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • R(B)
      • Vars
        • S(b);N_GUARD::QAB1(F),XS(b)
        • S(i);SBLOCK::S(C)
      • Refutation
        • S(i);
    • Try
      • S(A);XP(d)
      • Threat
        • R(E)
      • Vars
        • B(a);OGATE,XS(A)::R1(B),XB(a)
        • S(i);N_GUARD::QAB1(F),XS(i)
        • S(b);SBLOCK::S(C)
        • S(i);N_GUARD::QAB1(F)
      • Refutation
        • S(b);XS(C)
  • Actual
    • S(A);
    • Threat
      • S(C)
    • Vars
      • S(b);N_GUARD,XS(C)::QAB1(F)
      • P(g);N_GUARD,XS(A)::QAR1(F)
      • S(i);N_GUARD::QAB1(F)
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