MESON Chess Problem Database

Problem Display
PID: 207105 (8/3K4/3N3n/2pk2n1/5p2/2P5/8/4Q3 w - - 0 1)

Healey, Frank

A Collection of Two Hundred Chess Problems (Healey), 1866

8/3K4/3N3n/2pk2n1/5p2/2P5/8/4Q3

#2

4 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qe4#
      • 2.Qe6#
    • 1...Sh3
      • 2.Qe4#
      • 2.Qe6#
    • 1...Se4
      • 2.Qxe4#
    • 1...Se6
      • 2.Qe4#
      • 2.Qxe6#
    • 1...Sgf7
      • 2.Qe4#
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe4#
      • 2.Qe6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.c4#
      • 1...Se4
        • 2.Qxe4#
      • 1...c4
        • 2.Qd4#
      • 1...fxe3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.c4#
      • 1...Ke5
        • 2.c4#
      • 1...c4
        • 2.Qa5#

There are these versions: 207217

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::QAB1(A),XS(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • P(B)
      • Vars
        • S(d);N_GUARD::QAB1(A),XS(d)
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • P(B)
    • Vars
      • K(c);P-FLIGHT::QAB(A)+P(B)
      • P(b);OGATEB::QAR(A)
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