MESON Chess Problem Database

Problem Display
PID: 233388 (K7/p7/k2n4/pp6/2N5/1Q6/8/1R6 w - - 0 1)

Benko, Pal Charles

Chess Life, 1983

K7/p7/k2n4/pp6/2N5/1Q6/8/1R6

#2

4 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Qxb5#
    • 1...Se4
      • 2.Qxb5#
    • 1...Sf5
      • 2.Qxb5#
    • 1...Sb7
      • 2.Qxb5#
    • 1...Sf7
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qxb5#
    • 1...Se8
      • 2.Qxb5#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qxa5#
      • 1...Sxc4
        • 2.Qxb5#
      • 1...bxc4
        • 2.Qc6#
      • 1...Sb7
        • 2.Qxb5#
      • 1...bxa4!
    • 1.Qf3?
      • threat
        • 2.Qc6#
      • 1...Sxc4
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb7#
      • 1...Se4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxa5#
        • 2.Qxd6#
      • 1...Sxc4
        • 2.Qxb5#
      • 1...axb4
        • 2.Ra1#
      • 1...bxc4
        • 2.Qxd6#
      • 1...Se4
        • 2.Qxa5#
        • 2.Qxb5#
      • 1...Sf5
        • 2.Qxa5#
        • 2.Qxb5#
      • 1...Sb7
        • 2.Qxb5#
      • 1...Sf7
        • 2.Qxa5#
        • 2.Qxb5#
      • 1...Sc8
        • 2.Qxa5#
        • 2.Qxb5#
      • 1...Se8
        • 2.Qxa5#
        • 2.Qxb5#
      • 1...a4
        • 2.Qa5#
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(d);N_GUARD,XS(C)::QAB1(B),XP(b)
    • S(d);N_GUARD::QAB1(B),XP(b)
  • Tries
    • Try
      • Q(B);P_PINP(a)
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • S(d);N_GUARD,XS(C)::QAB1(B),XP(b)
        • P(b);OGATE,XS(C)::QAR2(B)
        • S(d);N_GUARD::QAB1(B),XP(b)
      • Refutation
        • P(b);N_SPINP(a),XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • S(d);N_GUARD,XS(C)::QAB1(B)
        • S(d);N_GUARD::QAB1(B)
      • Refutation
        • S(d);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • S(d);N_GUARD,XS(C)::QAB1(B),XP(b)
      • P(a);OGATEB,XQ(B)::R(A)
      • P(b);XS(C)::QAR(B),XS(d)
      • S(d);N_GUARD::QAB1(B),XP(b)
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