MESON Chess Problem Database

Problem Display
PID: 138276 (1b6/8/5n2/2N5/Q7/5k2/5P2/5K2 w - - 0 1)

Notaro, Rosario

2nd Prize, Pyrgos TT, 1979

1b6/8/5n2/2N5/Q7/5k2/5P2/5K2

#2

4 + 3

14744 Nuova Antologia dei Problemisti Italiani 1992
3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qd1#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
    • 1...Sd5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
    • 1...Se8
      • 2.Qe4#
    • 1...Sg8
      • 2.Qe4#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sg5#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Se4
        • 2.Qd1#
      • 1...Sh7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Se1#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Se4
        • 2.Qd1#

This anticipates 22753(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • B(c);SBLOCK::QAB(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(b);N_GUARD::QAB1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • B(c);N_GUARD::QAR1(C),XB(c)
        • S(b);SBLOCK::QAB(C)
      • Refutation
        • S(b);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(c);N_GUARD::QAR1(C),XB(c)
      • S(b);SBLOCK::QAB(C)
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