MESON Chess Problem Database

Problem Display
PID: 227524 (8/8/3p4/3P3n/1n1p1p2/1Bpk1KpN/4p3/2Q1B3 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1926

8/8/3p4/3P3n/1n1p1p2/1Bpk1KpN/4p3/2Q1B3

#2

6 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qc2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxd5
      • 2.Qc2#
    • 1...Sa6
      • 2.Qc2#
    • 1...Sc6
      • 2.Qc2#
    • 1...Sf6
      • 2.Sxf4#
    • 1...Sg7
      • 2.Sxf4#
    • 1...c2
      • 2.Qd2#
    • 1...g2
      • 2.Sf2#
  • Tries
    • 1.Qxf4?
      • threat
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Sg7
        • 2.Qe4#
      • 1...Sf6!
    • 1.Qb1+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...c2!
  • Keys
    • 1.Qa3!
      • 1...Sxd5
        • 2.Qa6#
      • 1...Sf6
        • 2.Sxf4#
      • 1...Sa2
        • 2.Qa6#
      • 1...Sc2
        • 2.Qa6#
      • 1...Sa6
        • 2.Qxa6#
      • 1...Sc6
        • 2.Qa6#
      • 1...Sg7
        • 2.Sxf4#
      • 1...c2
        • 2.Ba2#
      • 1...g2
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(A)
    • S(e);N_GUARD::QAB1(A),XS(e)
    • S(e);N_GUARD,XP(F)::QAB1(A)
    • S(h);N_GUARD::S(E),XP(g)
    • P(b);N_GUARD::QAR1(A)
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • Q(A);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);XQ(A)::S(E),XS(h)
        • S(h);::QAB1(A)
      • Refutation
        • S(h);
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(A);
    • Vars
      • S(e);N_GUARD,XP(F)::QAB(A)
      • S(h);N_GUARD::S(E),XP(g)
      • S(e);N_GUARD::QAB(A)
      • S(e);N_GUARD::QAB(A),XS(e)
      • P(b);OGATEB,SBLOCK::QAR(A)+B(C)
      • P(d);N_GUARD::S(E)
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Developed and maintained by Brian Stephenson.
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