MESON Chess Problem Database

Problem Display
PID: 15306 (8/8/8/3Q4/8/8/N1k3n1/K4N2 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1982

8/8/8/3Q4/8/8/N1k3n1/K4N2

#2

4 + 2

5454 Near Snap 1982
3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf4
      • 2.Se3#
    • 1...Sh4
      • 2.Se3#
  • Tries
    • 1.Sb4+?
      • 1...Kc1
        • 2.Qd2#
      • 1...Kc3!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Qd2#
      • 1...Kxc1
        • 2.Qd2#
      • 1...Kc3
        • 2.Qc5#

This anticipates 232389(1982), 178231(2007)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAB1(D)
      • K(a);P-FLIGHT::QAR2(D)
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