MESON Chess Problem Database

Problem Display
PID: 255972 (4Q3/b1pn4/3B4/2Pp4/N7/kP2R3/N7/K7 w - - 0 1)

Persson, Lars Holger

Schackvarlden, 1934

4Q3/b1pn4/3B4/2Pp4/N7/kP2R3/N7/K7

#2

8 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.b4#
    • 1...Sf6
      • 2.b4#
    • 1...Sb8
      • 2.b4#
    • 1...Sf8
      • 2.b4#
  • Tries
    • 1.S4c3?
      • threat
        • 2.Sb1#
        • 2.Sb5#
      • 1...c6
        • 2.Sb1#
      • 1...Kxb3!
  • Keys
    • 1.Sb2!
      • threat
        • 2.b4#
      • 1...Bxc5
        • 2.Qa8#
      • 1...Sxc5
        • 2.Qa4#
      • 1...Se5
        • 2.Qa4#
      • 1...d4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(e);::R(D)+P(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::S(E)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • S(E);
    • Threat
      • R(D)+P(C)
    • Vars
      • B(c);OGATEB,P_SPINB(c),XP(F)::QAR(H)
      • S(e);OGATE,P_SPINS(e),XP(F)::QAR1(H)
      • S(e);OGATE::QAR1(H)
      • P(b);N_GUARD::S(E)
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