MESON Chess Problem Database

Problem Display
PID: 232783 (8/4Knpp/3N2bk/8/7p/8/6Q1/3B4 w - - 0 1)

Hoy, Paul

Freie Presse, 1977

8/4Knpp/3N2bk/8/7p/8/6Q1/3B4

#2

4 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sxf7#
    • 1...Bc2
      • 2.Sxf7#
    • 1...Bd3
      • 2.Sxf7#
    • 1...Be4
      • 2.Sxf7#
    • 1...Bf5
      • 2.Sxf5#
      • 2.Sxf7#
    • 1...Bh5
      • 2.Sf5#
    • 1...Se5
      • 2.Qd2#
    • 1...Sxd6
      • 2.Qd2#
    • 1...Sd8
      • 2.Qd2#
    • 1...Sh8
      • 2.Qd2#
  • Keys
    • 1.Qc6!
      • threat
        • 2.Sxf7#
      • 1...Kg5
        • 2.Qc1#
      • 1...Sxd6
        • 2.Qc1#
      • 1...Sg5
        • 2.Sf5#
      • 1...Se5
        • 2.Qc1#
      • 1...Sd8
        • 2.Qc1#
      • 1...Sh8
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::S(C),XS(d)
    • B(b);N_GUARD::S(C)
    • S(d);N_GUARD::QAB(B)
    • S(d);N_GUARD,XS(C)::QAB(B)
  • Actual
    • Q(B);
    • Threat
      • S(C),XS(d)
    • Vars
      • K(c);S_FLIGHT::QAB(B)
      • S(d);N_GUARD,XS(C)::QAB(B)
      • S(d);SBLOCK::S(C)
      • S(d);N_GUARD::QAB(B)
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