MESON Chess Problem Database

Problem Display
PID: 23778 (4K3/2b1Np2/ppPk4/1p1N1Pp1/1n1P2P1/3p4/8/2Q5 w - - 0 1)

Cuppini, Alessandro

Sakkelet, 1996

4K3/2b1Np2/ppPk4/1p1N1Pp1/1n1P2P1/3p4/8/2Q5

#2

8 + 9

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Sc8#
    • 1...Sxc6
      • 2.Qxc6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qg3#
        • 2.Qe5#
      • 1...Sxd5
        • 2.Qe5#
      • 1...f6
        • 2.Qg3#
        • 2.Qe6#
      • 1...Sxc6!
    • 1.Qxg5?
      • threat
        • 2.Qf4#
        • 2.Qf6#
      • 1...Sxc6
        • 2.Qf6#
      • 1...f6
        • 2.Qf4#
        • 2.Qxf6#
      • 1...Sxd5!
    • 1.Qe1?
      • threat
        • 2.Qg3#
        • 2.Qxb4#
        • 2.Qe5#
      • 1...Sxd5
        • 2.Qe5#
      • 1...Sa2
        • 2.Qg3#
        • 2.Qe5#
      • 1...Sc2
        • 2.Qg3#
        • 2.Qe5#
      • 1...d2
        • 2.Qg3#
        • 2.Qe5#
      • 1...a5
        • 2.Qg3#
        • 2.Qe5#
      • 1...f6
        • 2.Qg3#
        • 2.Qxb4#
        • 2.Qe6#
      • 1...Sxc6!
    • 1.Qc4?
      • threat
        • 2.Sc8#
        • 2.Qxb4#
      • 1...Sxd5
        • 2.Sc8#
        • 2.Qxd5#
      • 1...Sxc6
        • 2.Sc8#
        • 2.Qxc6#
      • 1...Sa2
        • 2.Sc8#
      • 1...Sc2
        • 2.Sc8#
      • 1...a5
        • 2.Sc8#
      • 1...bxc4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh2#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxc6
        • 2.Sc8#

This anticipates 168491(2003)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK,XS(D)::S(G)
    • S(b);OGATE,XP(F)::QAR1(A),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XS(D)::QAB1(A)
      • Refutation
        • S(b);XP(F)
    • Try
      • Q(A);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(F)::QAR2(A)
      • Refutation
        • S(b);XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);XS(D)::QAB1(A)
      • Refutation
        • S(b);XP(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::S(G)
        • P(e);::S(G)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(b);OGATE,XS(D)::QAR1(A),XS(b)
      • S(b);SBLOCK,XP(F)::S(G)
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