MESON Chess Problem Database

Problem Display
PID: 110037 (5bbq/BQ2pr1p/3p4/5p1N/R2P4/3Nkp2/5p1K/3R1B2 w - - 0 1)

Cacciari, Europe

Il Littorale, 1929-1931

5bbq/BQ2pr1p/3p4/5p1N/R2P4/3Nkp2/5p1K/3R1B2

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Bxd4#
    • 1...Qe5+
      • 2.dxe5#
    • 1...Rf6
      • 2.d5#
    • 1...Rg7
      • 2.d5#
    • 1...e5
      • 2.dxe5#
      • 2.d5#
  • Tries
    • 1.Sc1?
      • threat
        • 2.Rd3#
        • 2.Ra3#
      • 1...Qe5+
        • 2.dxe5#
      • 1...Rf6
        • 2.Rd3#
        • 2.d5#
      • 1...Rg7
        • 2.Rd3#
        • 2.d5#
      • 1...d5!
    • 1.Sb2?
      • threat
        • 2.Sc4#
        • 2.Rd3#
        • 2.Ra3#
      • 1...Qe5+
        • 2.dxe5#
      • 1...Rf6
        • 2.Rd3#
        • 2.d5#
      • 1...Rg7
        • 2.Rd3#
        • 2.d5#
      • 1...d5!
    • 1.Sb4?
      • threat
        • 2.Sc2#
        • 2.Rd3#
        • 2.Ra3#
      • 1...Qe5+
        • 2.dxe5#
      • 1...Rf6
        • 2.Sc2#
        • 2.Rd3#
      • 1...Rg7
        • 2.Sc2#
        • 2.Rd3#
      • 1...d5!
    • 1.Sdf4?
      • threat
        • 2.Rd3#
        • 2.Ra3#
      • 1...Rf6
        • 2.Rd3#
        • 2.d5#
      • 1...Rg7
        • 2.Rd3#
        • 2.d5#
      • 1...d5!
    • 1.Se5?
      • threat
        • 2.Sc4#
        • 2.Rd3#
        • 2.Ra3#
        • 2.Qxf3#
        • 2.d5#
      • 1...Qxe5+
        • 2.dxe5#
      • 1...dxe5
        • 2.Rd3#
        • 2.Ra3#
        • 2.dxe5#
        • 2.d5#
      • 1...Rf6
        • 2.Rd3#
        • 2.Qxf3#
        • 2.d5#
      • 1...Rg7
        • 2.Rd3#
        • 2.Qxf3#
        • 2.d5#
      • 1...d5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Sc5#
      • 1...Qe5+
        • 2.dxe5#
      • 1...Ke4
        • 2.Sxf2#
      • 1...Qxd4
        • 2.Qe6#
      • 1...Rf6
        • 2.d5#
      • 1...Rg7
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(k);OGATE,P_SPINQ(k),XP(F)::B(H),XQ(k)
    • Q(k);CHECK,OGATE::B(H)+P(F),XQ(k)
    • R(g);S_CUTQ(k)::B(H)+P(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);CHECK,OGATE::B(H)+P(F),XQ(k)
      • Refutation
        • P(e);
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(k);CHECK,OGATE::B(H)+P(F),XQ(k)
      • Refutation
        • P(e);
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(k);CHECK,OGATE::B(H)+P(F),XQ(k)
      • Refutation
        • P(e);
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);
    • Try
      • S(D);
      • Threat
        • DUALS(5)
      • Vars
        • Q(k);CHECK,OGATE,XS(D)::B(H)+P(F),XQ(k)
      • Refutation
        • P(e);
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+S(D)
    • Vars
      • Q(k);CHECK,OGATE::B(H)+P(F),XQ(k)
      • K(b);P-FLIGHT::S(D),XP(a)
      • Q(k);N_GUARD,P_SPINQ(k),XP(F)::QAR(I)
      • R(g);S_CUTQ(k)::B(H)+P(F)
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