MESON Chess Problem Database

Problem Display
PID: 827 (3n2Q1/Kp1r4/1BkN2BR/1pprP3/3p4/3p4/N1b5/2R5 w - - 0 1)

Valois, Paul Stedman

British Chess Magazine, 1968

3n2Q1/Kp1r4/1BkN2BR/1pprP3/3p4/3p4/N1b5/2R5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...R5xd6
      • 2.Be4#
    • 1...R7xd6
      • 2.Be8#
    • 1...Bb1
      • 2.Sb4#
    • 1...Bd1
      • 2.Sb4#
    • 1...Bb3
      • 2.Sb4#
    • 1...Ba4
      • 2.Sb4#
    • 1...c4
      • 2.Sb4#
  • Keys
    • 1.Bxd3!
      • threat
        • 2.Bxb5#
      • 1...R5xd6
        • 2.Qg2#
      • 1...R7xd6
        • 2.Qe8#
      • 1...Bxd3
        • 2.Sb4#
      • 1...Ba4
        • 2.Sb4#
      • 1...b4
        • 2.Bb5#
      • 1...c4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);OGATEB,XS(E)::B(F)
    • R(i);OGATEB,XS(E)::B(F)
    • B(a);P_SPINP(e)::S(B)
    • P(e);N_GUARD::S(B)
  • Actual
    • B(F);XP(b)
    • Threat
      • B(F),XP(d)
    • Vars
      • R(f);OGATEB,P_SPINR(f),XS(E)::QAB(I)
      • R(i);OGATEB,P_SPINR(i),XS(E)::QAB(I)
      • B(a);P_SPINP(e),XB(F)::S(B)
      • B(a);P_SPINP(e)::S(B)
      • P(d);::B(F)
      • P(e);N_GUARD::S(B)
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