MESON Chess Problem Database

Problem Display
PID: 105405 (k1q5/1RBp4/K7/1Q6/8/8/8/8 w - - 0 1)

Schilnikov, Vladimir Evgenievich

Listova Gospodarstvo, 1991

k1q5/1RBp4/K7/1Q6/8/8/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7+
      • 2.Qxb7#
    • 1...Qb8
      • 2.Rxb8#
    • 1...Qd8
      • 2.Ra7#
    • 1...Qe8
      • 2.Ra7#
    • 1...Qf8
      • 2.Ra7#
    • 1...Qg8
      • 2.Ra7#
    • 1...Qh8
      • 2.Ra7#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qa7#
      • 1...Qb8
        • 2.Rxb8#
      • 1...Qxb7+!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qa7#
      • 1...Qxb7+
        • 2.Qxb7#
      • 1...Qb8
        • 2.Rxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(c);CHECK,OGATE,XR(C)::QAB1(A),XQ(c)
    • Q(c);N_PINR(C)::R1(C),XQ(c)
    • Q(c);N_PINR(C)::R1(C)
    • Q(c);N_PINR(C),SBLOCK::R1(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);N_PINR(C)::R1(C),XQ(c)
      • Refutation
        • Q(c);CHECK,XR(C)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(c);CHECK,OGATE,XR(C)::QAB1(A),XQ(c)
      • Q(c);N_PINR(C)::R1(C),XQ(c)
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