MESON Chess Problem Database

Problem Display
PID: 203596 (2Bnr3/3P1pq1/1B2k3/R1p1N3/4R1bb/3pN1Q1/8/K7 w - - 0 1)

Westbury, Eric Ernest

2nd HM., L'Italia Scacchistica, 1924

2Bnr3/3P1pq1/1B2k3/R1p1N3/4R1bb/3pN1Q1/8/K7

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Qxe5#
    • 1...Qh6
      • 2.S5xg4#
    • 1...Qf8
      • 2.S5xg4#
    • 1...Qg8
      • 2.S5xg4#
    • 1...Be7
      • 2.dxe8S#
    • 1...Sc6
      • 2.d8Q#
    • 1...Sb7
      • 2.d8Q#
  • Tries
    • 1.dxe8Q+?
      • 1...Kf6
        • 2.Bxd8#
        • 2.Qxd8#
      • 1...Kd6!
    • 1.dxe8R+?
      • 1...Kf6
        • 2.Bxd8#
      • 1...Kd6!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Bxd8#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Kd6
        • 2.Bxd8#
      • 1...Kf6
        • 2.Bxd8#
      • 1...Ke7
        • 2.Bxc5#
      • 1...Qf8
        • 2.S5xg4#
      • 1...Be7
        • 2.dxe8S#
      • 1...Sc6
        • 2.d8Q#
      • 1...Sb7
        • 2.d8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(g);CHECK,OGATE,P_SPINQ(g),XS(F)::QAR1(C),XQ(g)
    • Q(g);N_PINS(F)::R(D)+S(F),XB(b)
    • B(c);SBLOCK::PXR(i)=S
    • S(h);OGATE::P=Q
  • Tries
    • Try
      • P(H);CHECK,XR(i)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(H);CHECK,XR(i)
      • Vars
        • K(e);N_PINS(F),P-FLIGHT::B(G),XS(h)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(E);
    • Threat
      • R(E)+B(G),XS(h)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XS(F)::QAR1(C),XQ(g)
      • K(e);P-FLIGHT::R(E)+B(G),XS(h)
      • K(e);N_PINS(F),P-FLIGHT::R(E)+B(G),DCHECK,XS(h)
      • K(e);P-FLIGHT::B(G),XP(d)
      • Q(g);N_PINS(F)::R(D)+S(F),XB(b)
      • B(c);SBLOCK::PXR(i)=S
      • S(h);OGATE::P=Q
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