MESON Chess Problem Database

Problem Display
PID: 148269 (K7/1p6/1Q2N3/R3pp2/Rr1Nk2n/3p4/n6q/2bB2B1 w - - 0 1)

Goldstein, Alexander

Hjelle, David

L'Italia Scacchistica, 1952

K7/1p6/1Q2N3/R3pp2/Rr1Nk2n/3p4/n6q/2bB2B1

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Qxb7#
    • 1...Rxd4
      • 2.Qxb7#
    • 1...Sg2
      • 2.Bf3#
    • 1...Sf3
      • 2.Bxf3#
    • 1...Sg6
      • 2.Bf3#
    • 1...d2
      • 2.Bc2#
    • 1...f4
      • 2.Sg5#
  • Tries
    • 1.Sc5+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Kf4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qxb7#
      • 1...Qxg1
        • 2.Rxe5#
      • 1...d2
        • 2.Qe3#
      • 1...f4
        • 2.Rxe5#
      • 1...Qc2
        • 2.Rxe5#
      • 1...Qf2
        • 2.Rxe5#
      • 1...Sc3
        • 2.Rxb4#
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(e);N_GUARD,P_PINR(E),XR(C)::QAB(F),XP(j)
    • R(e);N_GUARD,P_SPINR(e),XS(D)::QAB(F),XP(j)
    • S(g);N_GUARD::B(A)
    • S(g);N_GUARD::B(A),XS(g)
    • P(d);OGATEB::B(A)
    • P(i);SBLOCK,S_CUTB(a)::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(F)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • S(D);P_PINR(e)
    • Threat
      • QAB(F),XP(j)
    • Vars
      • Q(c);N_GUARD,XB(B)::R1(E),XP(h)
      • P(d);S_CUTB(a)::QAR1(F)
      • P(i);S_CUTQ(c)::R1(E),XP(h)
      • Q(c);N_GUARD::R1(E),XP(h)
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