MESON Chess Problem Database

Problem Display
PID: 96522 (8/1K6/3p4/k7/N6Q/8/2n5/5B2 w - - 0 1)

Lokker, Miklosh S

Problemas, 1967

8/1K6/3p4/k7/N6Q/8/2n5/5B2

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qa4#
      • 1...Sb4
        • 2.Qd8#
      • 1...Sd4!
    • 1.Sc5?
      • threat
        • 2.Sb3#
        • 2.Qa4#
      • 1...Sd4
        • 2.Qe1#
      • 1...Sa1
        • 2.Qe1#
        • 2.Qa4#
      • 1...Sb4
        • 2.Qd8#
      • 1...dxc5!
    • 1.Sb6?
      • threat
        • 2.Qa4#
      • 1...Sd4
        • 2.Qe1#
      • 1...Sb4!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Qa4#
      • 1...Sd4
        • 2.Qe1#
      • 1...Sb4
        • 2.Qd8#

This is a version of 24758

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);SBLOCK::QAB(C)
      • Refutation
        • S(a);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB(C)
        • S(a);SBLOCK::QAB(C)
      • Refutation
        • P(c);XS(B)
    • Try
      • S(B);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD::QAB(C)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • S(a);N_GUARD::QAB(C)
      • S(a);SBLOCK::QAB(C)
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