MESON Chess Problem Database

Problem Display
PID: 152568 (6K1/2nNp1N1/3kP3/pP2RP2/1q6/B3PB2/4Q3/1b1r4 w - - 0 1)

Alliney, Frederico

L'Italia Scacchistica, 1985

6K1/2nNp1N1/3kP3/pP2RP2/1q6/B3PB2/4Q3/1b1r4

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Bxc5#
    • 1...Bxf5
      • 2.Sxf5#
    • 1...Sxb5
      • 2.Se8#
    • 1...Sd5
      • 2.Se8#
    • 1...Sa6
      • 2.Se8#
    • 1...Sa8
      • 2.Se8#
    • 1...Se8
      • 2.Sxe8#
    • 1...a4
      • 2.Bxb4#
  • Tries
    • 1.Rd5+?
      • 1...Sxd5
        • 2.Se8#
      • 1...Rxd5!
    • 1.Qxd1+?
      • 1...Sd5
        • 2.Se8#
      • 1...Bd3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Rd5#
      • 1...Sxb5
        • 2.Se8#
        • 2.Rxb5#
      • 1...Sd5
        • 2.Se8#
        • 2.Rxd5#
      • 1...Rd5
        • 2.Rxd5#
      • 1...Be4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(c);OGATE::B(B),XQ(c)
    • B(a);XP(G)::S(J),XB(a)
    • S(f);N_GUARD,XP(E)::S(J)
    • S(f);N_GUARD::S(J)
    • S(f);N_GUARD::S(J),XS(f)
    • P(d);N_GUARD::B(B),XQ(c)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(f);XR(F)::S(J)
      • Refutation
        • R(b);XR(F)
    • Try
      • Q(A);CHECK,XR(b)
      • Vars
        • S(f);P_SPINS(f)::S(J)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(F),DCHECK
    • Vars
      • R(b);::QAB(A)+R(F),DCHECK,XR(b)
      • B(a);::QAB(A)+R(F)
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Developed and maintained by Brian Stephenson.
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