MESON Chess Problem Database

Problem Display
PID: 81466 (1b1RK1n1/6P1/1r2k1P1/1Bp1p1QN/2p1p1p1/B1N1R3/3P2q1/5b2 w - - 0 1)

Lertoria, Ernest

The Field, 1951

(First published on Sat Nov 10 1951)

1b1RK1n1/6P1/1r2k1P1/1Bp1p1QN/2p1p1p1/B1N1R3/3P2q1/5b2

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxg4#
    • 1...Qxd2
      • 2.Qxg4#
    • 1...Qh2
      • 2.Qxg4#
    • 1...Bd6
      • 2.Bd7#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
    • 1...Se7
      • 2.Qf6#
    • 1...g3
      • 2.Qg4#
  • Tries
    • 1.Bc6?
      • threat
        • 2.Bd5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Qxd2
        • 2.Qxg4#
      • 1...Se7
        • 2.Qf6#
      • 1...Rxc6!
  • Keys
    • 1.d4!
      • threat
        • 2.d5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...cxd4
        • 2.Bd7#
      • 1...exd4
        • 2.Qd5#
      • 1...cxd4 ep
        • 2.Bc4#
      • 1...exd4 ep
        • 2.Sf4#
      • 1...Qd2
        • 2.Qxg4#
      • 1...Rd6
        • 2.Qxe5#
      • 1...Se7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::QAB(F),XP(e)
    • Q(b);N_GUARD,XP(A)::QAB(F),XP(e)
    • B(j);SBLOCK::B(E)
    • S(k);CHECK,N_GUARD::QAR1(F),XS(k)
    • S(k);N_GUARD::QAR1(F)
    • P(e);S_CUTQ(b)::QAB(F)
  • Tries
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • S(k);CHECK,N_GUARD::QAR1(F),XS(k)
        • Q(b);N_GUARD,XP(A)::QAB(F),XP(e)
        • S(k);N_GUARD::QAR1(F)
      • Refutation
        • R(h);XB(E)
  • Actual
    • P(A);
    • Threat
      • P(A)
    • Vars
      • S(k);CHECK,N_GUARD::QAR1(F),XS(k)
      • P(f);XP(A)::B(E)
      • P(g);OGATE,P_SPINP(d),XP(A)::QAB1(F)
      • P(c);EP,S_CUTB(a),XP(A)::B(E)
      • P(d);EP,P_SPINP(g),XP(A)::S(G)
      • Q(b);N_GUARD::QAB(F),XP(e)
      • R(h);S_CUTB(j)::QAR1(F),XP(g)
      • S(k);N_GUARD::QAR1(F)
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