MESON Chess Problem Database

Problem Display
PID: 267914 (6BK/3p4/5p2/QN1P1p1N/1pp1kPpp/3rn3/2n1P3/2BR4 w - - 0 1)

Piatesi, Antonio

Mat, 1980

6BK/3p4/5p2/QN1P1p1N/1pp1kPpp/3rn3/2n1P3/2BR4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sd6#
    • 1...Rb3
      • 2.Sd6#
    • 1...Rc3
      • 2.Sd6#
    • 1...Rd4
      • 2.Sd6#
    • 1...Sd4
      • 2.Sd6#
    • 1...Sxd1
      • 2.Sxf6#
    • 1...Sf1
      • 2.Sxf6#
    • 1...Sg2
      • 2.Sxf6#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Sd6#
      • 1...d6
        • 2.Sxd6#
      • 1...cxd3!
    • 1.Qb6?
      • threat
        • 2.Sd6#
      • 1...d6
        • 2.Sxd6#
      • 1...Rxd5!
    • 1.Qc7?
      • threat
        • 2.Sxf6#
      • 1...d6
        • 2.Qe7#
      • 1...Sxd5!
    • 1.Qa7?
      • threat
        • 2.Sd6#
      • 1...d6
        • 2.Sxd6#
        • 2.Qe7#
      • 1...Rxd5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qe8#
      • 1...Rxd5
        • 2.Sd6#
      • 1...Sxd5
        • 2.Sxf6#
      • 1...Sd4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);::S(F)
    • S(a);SBLOCK::S(F)
    • S(c);XR(B)::S(H),XP(j)
    • S(c);::S(H),XP(j)
  • Tries
    • Try
      • R(B);XR(b)
      • Threat
        • S(F)
      • Vars
        • P(k);::S(F),XP(k)
      • Refutation
        • P(e);XR(B)
    • Try
      • Q(E);
      • Threat
        • S(F)
      • Vars
        • P(k);::S(F),XP(k)
      • Refutation
        • R(b);XP(G)
    • Try
      • Q(E);
      • Threat
        • S(H),XP(j)
      • Vars
        • P(k);OGATE::QAR(E)
      • Refutation
        • S(c);XP(G)
    • Try
      • Q(E);
      • Threat
        • S(F)
      • Refutation
        • R(b);XP(G)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)
    • Vars
      • R(b);P_SPINR(b),XP(G)::S(F)
      • S(c);P_SPINS(c),XP(G)::S(H),XP(j)
      • S(a);SBLOCK::S(F)
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