MESON Chess Problem Database

Problem Display
PID: 53668 (1r1q4/3n4/p3Qp2/1kpN3R/8/1P6/P1N1b3/K7 w - - 0 1)

Leow, S

Schachzeitung der Berliner Schachgesellschaft, 1847

1r1q4/3n4/p3Qp2/1kpN3R/8/1P6/P1N1b3/K7

#2

7 + 8

5923 The Chess Player's Chronicle (Sampson) 1875
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qxd7#
    • 1...c4
      • 2.Sc3#
      • 2.Sc7#
    • 1...a5
      • 2.Sa3#
      • 2.Sc3#
      • 2.a4#
  • Tries
    • 1.Qxd7+?
      • 1...Ka5
        • 2.Qa4#
      • 1...Qxd7!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Qa4#
      • 1...Kxc6!
  • Keys
    • 1.b4!
      • threat
        • 2.Sc3#
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(h);N_GUARD,P_PINP(B),SBLOCK::QAB(G),XS(f)
  • Tries
    • Try
      • Q(G);CHECK,XS(f)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • Q(h);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT,XQ(G)
  • Actual
    • P(D);
    • Threat
      • S(E)
    • Vars
      • K(b);S_FLIGHT::S(E)
      • K(b);S_FLIGHT::QAB(G),XB(a)
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