MESON Chess Problem Database

Problem Display
PID: 219458 (8/8/8/4N3/2p3Q1/8/2pp4/4k1K1 w - - 0 1)

Jaeger, Peter R

Speckmann, Werner

Schach-Report, 1990

8/8/8/4N3/2p3Q1/8/2pp4/4k1K1

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Sd3#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qf1#
      • 1...d1Q
        • 2.Qf2#
      • 1...d1B
        • 2.Qf2#
      • 1...d1R
        • 2.Qf2#
        • 2.Qe3#
      • 1...d1S!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qf1#
      • 1...Kd1
        • 2.Qf1#
      • 1...d1Q
        • 2.Qf2#
      • 1...d1S
        • 2.Sf3#
      • 1...d1B
        • 2.Qf2#
      • 1...d1R
        • 2.Sf3#
        • 2.Qf2#

This is a version of 85685

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • P(c);SBLOCK::QAB1(B)
      • P(c);SBLOCK::S(C)
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