MESON Chess Problem Database

Problem Display
PID: 99174 (K7/2p2pB1/p1Q1N1P1/r4k2/4pp2/4p2P/8/5Rq1 w - - 0 1)

Hermanson, Halvar

3rd Prize, Magyar Sakkelet, 1967

K7/2p2pB1/p1Q1N1P1/r4k2/4pp2/4p2P/8/5Rq1

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Sd4#
    • 1...Qxg6
      • 2.Rxf4#
    • 1...fxg6
      • 2.Rxf4#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qf6#
      • 1...Qxg6
        • 2.Qd5#
      • 1...f6
        • 2.Qxf6#
      • 1...Qg5
        • 2.Qxe4#
      • 1...Kg5!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Qf6#
      • 1...Kg5
        • 2.Qf6#
      • 1...Qxg6
        • 2.Se6#
      • 1...f6
        • 2.Qxf6#
      • 1...Qg5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::S(D)
    • Q(a);SBLOCK,XP(E)::R1(A),XP(d)
    • P(i);SBLOCK,XP(E)::R1(A),XP(d)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • Q(a);SBLOCK,XP(E)::QAR2(C)
        • P(i);::QAR1(C),XP(i)
        • Q(a);SBLOCK::QAB1(C),XP(c)
      • Refutation
        • K(f);N_SPINP(d),P-FLIGHT
  • Actual
    • S(D);XP(d)
    • Threat
      • QAR1(C)
    • Vars
      • K(f);P-FLIGHT::QAB1(C)
      • Q(a);N_GUARD,SBLOCK,XP(E)::R(A)+S(D)
      • P(i);::QAR1(C),XP(i)
      • Q(a);SBLOCK::QAB(C)
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