MESON Chess Problem Database

Problem Display
PID: 243790 (3r4/3R4/8/2B5/p5p1/1Pk5/rNn2P1Q/2R2K2 w - - 0 1)

Froberg, Johan Hilding Laurentius

Hultberg, Gustav Herbert

Tidskrift for Schack, 1981

3r4/3R4/8/2B5/p5p1/1Pk5/rNn2P1Q/2R2K2

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Qg3#
    • 1...axb3
      • 2.Qe5#
  • Tries
    • 1.f3?
      • threat
        • 2.Qxc2#
      • 1...Kxb2
        • 2.Qxc2#
      • 1...Kxb3
        • 2.Qxc2#
      • 1...axb3
        • 2.Qe5#
      • 1...Rxb2!
    • 1.f4?
      • threat
        • 2.Qxc2#
      • 1...Kxb2
        • 2.Qxc2#
      • 1...Kxb3
        • 2.Qxc2#
      • 1...Rxb2
        • 2.Qg3#
      • 1...axb3!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qxc2#
      • 1...Kxb2
        • 2.Qxc2#
      • 1...Kxb3
        • 2.Qxc2#
      • 1...Rxb2
        • 2.Qd3#
      • 1...axb3
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK,XS(C)::QAR(E)
    • P(d);SBLOCK,XP(F)::QAB(E)
  • Tries
    • Try
      • P(D);
      • Threat
        • QAR1(E),XS(b)
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR1(E),XS(b)
        • K(c);N_SPINS(b),P-FLIGHT,XP(F)::QAB1(E),XS(b)
        • P(d);SBLOCK,XP(F)::QAB(E)
      • Refutation
        • R(a);XS(C)
    • Try
      • P(D);
      • Threat
        • QAR1(E),XS(b)
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR1(E),XS(b)
        • K(c);N_SPINS(b),P-FLIGHT,XP(F)::QAB1(E),XS(b)
        • R(a);SBLOCK,XS(C)::QAR(E)
      • Refutation
        • P(d);XP(F)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XS(b)
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT,XS(C)::QAR1(E),XS(b)
      • K(c);N_SPINS(b),P-FLIGHT,XP(F)::QAB1(E),XS(b)
      • R(a);SBLOCK,XS(C)::QAR1(E)
      • P(d);SBLOCK,XP(F)::QAB(E)
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