MESON Chess Problem Database

Problem Display
PID: 94580 (3b4/7B/3Pp1N1/p1p1P1R1/1pp1krPr/4P3/1N3p1P/2BQ1K2 w - - 0 1)

Hjelle, David

Miskolcsi Magasapitok, 1952

3b4/7B/3Pp1N1/p1p1P1R1/1pp1krPr/4P3/1N3p1P/2BQ1K2

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rfxg4
      • 2.Sxh4#
    • 1...Rhxg4
      • 2.Sxf4#
  • Tries
    • 1.Qc2+?
      • 1...Kf3
        • 2.Sxh4#
      • 1...Kd5!
    • 1.Qf3+?
      • 1...Kxf3
        • 2.Sxh4#
      • 1...Rxf3!
    • 1.Qd3+?
      • 1...Kf3
        • 2.Sxh4#
      • 1...cxd3!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Sxh4#
        • 2.Qxf4#
      • 1...cxd4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc6#
      • 1...Kf3
        • 2.Sxh4#
      • 1...Kd5
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD,XP(G)::B(L)+S(K),XR(f)
    • R(f);N_GUARD,XP(G)::B(L)+S(K),XR(e)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::S(K),XR(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT,XQ(B)::S(K),XR(f)
      • Refutation
        • R(e);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::S(K),XR(f)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(h);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(d);S_FLIGHT::S(K),XR(f)
      • K(d);S_FLIGHT::S(K),XR(e)
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