MESON Chess Problem Database

Problem Display
PID: 76201 (r3k3/7R/8/8/8/8/p3K3/4Q3 w q - 0 1)

Lincoln, Robert A

2nd Prize, Leninsky Zavet, 2006

r3k3/7R/8/8/8/8/p3K3/4Q3

#2

3 + 3

145 StrateGems 2007
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qg8#
      • 1...Kd8
        • 2.Qg8#
      • 1...0-0-0
        • 2.Qc7#
      • 1...Kf8!
    • 1.Qa1?
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Ra7
        • 2.Qb8#

Anticipated by 15336(1982)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);0-0-0,OGATEB::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);0-0-0
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);0-0-0,OGATEB::QAB1(A)
      • R(b);N_GUARD::QAR(A)
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