MESON Chess Problem Database

Problem Display
PID: 27639 (4rB2/2n1p3/2p5/r2k1p2/2N1R3/2PN4/q1BQ4/5nK1 w - - 0 1)

Dombrovskis, Alfreds A

1st HM., Zurcher Woche, 1959

4rB2/2n1p3/2p5/r2k1p2/2N1R3/2PN4/q1BQ4/5nK1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qg2#
    • 1...Rc5
      • 2.Sb4#
      • 2.Sf4#
    • 1...c5
      • 2.Sb4#
    • 1...e5
      • 2.Sf4#
    • 1...e6
      • 2.Sb4#
      • 2.Sf4#
      • 2.Rd4#
  • Tries
    • 1.Sdb2+?
      • 1...Sxd2
        • 2.Re5#
      • 1...Kc5!
    • 1.Sb6+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kd6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Rd4#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Qxc4
        • 2.Re5#
      • 1...fxe4
        • 2.Sb6#
      • 1...Sb5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...c5
        • 2.Sf4#
      • 1...e5
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(G)::QAB(C)
    • P(f);SBLOCK::QAR(C)+S(E),DCHECK
    • P(h);::QAR(C)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • S(a);XQ(C)::R1(G)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(h)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(G)::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(h)
  • Actual
    • Q(C);
    • Threat
      • R1(G)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(G)::QAB(C)
      • Q(b);SBLOCK,XS(F)::R1(G)
      • P(e);SBLOCK,XR(G)::S(F)
      • S(g);N_GUARD::QAB1(C)
      • S(g);N_GUARD::QAB1(C),XS(g)
      • P(f);SBLOCK::S(E)
      • P(h);::S(E)
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Developed and maintained by Brian Stephenson.
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