MESON Chess Problem Database

Problem Display
PID: 180258 (3K4/2p5/2k2p2/b7/1R2N3/1np5/7Q/3R4 w - - 0 1)

Lider, Valentin Viktorovich

Die Schwalbe, 1979

3K4/2p5/2k2p2/b7/1R2N3/1np5/7Q/3R4

#2

5 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qh6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qb5#
      • 1...Bxb4
        • 2.Qa6#
      • 1...Sd4
        • 2.Qc4#
      • 1...Bb6!
    • 1.Qh5?
      • threat
        • 2.Qe8#
        • 2.Qb5#
        • 2.Qd5#
      • 1...Bb6
        • 2.Qd5#
      • 1...Sd2
        • 2.Qb5#
        • 2.Qc5#
      • 1...Sd4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qd5#
      • 1...f5
        • 2.Qg6#
        • 2.Qe8#
        • 2.Qh6#
      • 1...Bxb4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qa4#
      • 1...Bxb4
        • 2.Qa6#
      • 1...Bb6
        • 2.Qa8#
      • 1...Sd2
        • 2.Qe6#
      • 1...Sd4
        • 2.Qc4#
      • 1...Sc5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(e);OGATEB::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • B(c);N_GUARD,XR(C)::QAR2(B)
        • S(a);N_GUARD::QAR2(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);::QAB1(B)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • B(c);XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • B(c);OGATE,XR(C)::QAR2(B)
      • B(c);OGATE::QAB(B)
      • S(a);OGATE::QAR2(B)
      • S(a);OGATE::QAB1(B)
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Developed and maintained by Brian Stephenson.
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