MESON Chess Problem Database

Problem Display
PID: 148048 (5K2/N3Q3/2pP4/B1k2NR1/1Rp1P3/nP6/7b/1r1q4 w - - 0 1)

Cristoffanini, Guido

5th HM., West Sussex Gazette, 1929

5K2/N3Q3/2pP4/B1k2NR1/1Rp1P3/nP6/7b/1r1q4

#2

10 + 7

35 L'Italia Scacchistica 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Rxc4#
    • 1...Sb5
      • 2.Rxc4#
  • Tries
    • 1.Sd4+?
      • 1...Be5
        • 2.Se6#
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Sg7+?
      • 1...Qd5
        • 2.Se6#
      • 1...Be5
        • 2.Se6#
      • 1...Kd4!
    • 1.Rb5+?
      • 1...cxb5
        • 2.Qc7#
      • 1...Sxb5!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qa7#
      • 1...Qxd6
        • 2.Sg3#
      • 1...Bxd6
        • 2.Sfd4#
      • 1...Sxb5
        • 2.Rxc4#
      • 1...cxb5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::R1(B),XP(e)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(f);P_SPINP(e),S_FLIGHT,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::S(E)
        • B(c);P_SPINB(c)::S(E)
      • Refutation
        • K(f);P_SPINP(e),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • P(g);S_CUTS(d),XR(B)::QAR2(I)
      • Refutation
        • S(d);XR(B)
  • Actual
    • S(H);
    • Threat
      • QAB(I)
    • Vars
      • Q(b);N_GUARD,P_PINQ(I),P_SPINQ(b),XP(G)::R(F)+S(E)
      • B(c);N_GUARD,P_PINQ(I),P_SPINB(c),XP(G)::R(F)+S(E)
      • S(d);N_GUARD,SBLOCK,XS(H)::R1(B),XP(e)
      • P(g);OGATEB,XS(H)::QAR2(I)
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