MESON Chess Problem Database

Problem Display
PID: 209136 (2Q5/6R1/3P2P1/p1N5/PP1k4/4N1P1/5P2/4K3 w - - 0 1)

Froberg, Johan Hilding Laurentius

Suomen Shakki, 1991

2Q5/6R1/3P2P1/p1N5/PP1k4/4N1P1/5P2/4K3

#2

11 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3+?
      • 1...Kd3
        • 2.Qc2#
        • 2.Qc4#
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke5!
    • 1.Sd3?
      • threat
        • 2.Qc4#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Ke4!
    • 1.Sd7?
      • threat
        • 2.Qc4#
      • 1...Kd3
        • 2.Qc4#
      • 1...Ke4!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc3!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rh7#
        • 2.Rg8#
      • 1...Kc3
        • 2.Rb7#
      • 1...Ke5
        • 2.Rd7#
      • 1...axb4
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(G);
      • Threat
        • QAR1(K)
      • Vars
        • K(a);P-FLIGHT,XS(G)::QAB1(K)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(G);
      • Threat
        • QAR1(K)
      • Vars
        • K(a);P-FLIGHT::QAB1(K)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(K);
    • Threat
      • DUALS(8)
    • Vars
      • K(a);S_FLIGHT::QAB(K)+R(J)
      • P(b);XP(F)::QAB(K)+R(J)
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