MESON Chess Problem Database

Problem Display
PID: 180647 (r3k3/7R/8/2B5/1Q5K/5b2/8/8 w q - 0 1)

Belchikov, Nikolai Ivanovich

Zvyazda, 1970

r3k3/7R/8/2B5/1Q5K/5b2/8/8

#2

4 + 3

136 Problem Observer 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb8#
    • 1...Ra2
      • 2.Qb8#
    • 1...Ra3
      • 2.Qb8#
    • 1...Ra5
      • 2.Qb8#
    • 1...Ra6
      • 2.Qb8#
    • 1...Ra7
      • 2.Qb8#
    • 1...Rb8
      • 2.Qxb8#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qf8#
      • 1...Ra7
        • 2.Qb8#
      • 1...0-0-0!
    • 1.Qf4?
      • threat
        • 2.Qf8#
      • 1...Kd8
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qc7#
      • 1...Ra4!
    • 1.Qb5+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Bc6!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qb8#
      • 1...Rxa7
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAR(A)
    • R(b);N_GUARD::QAR(A),XR(b)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • R(b);N_GUARD::QAR(A)
      • Refutation
        • K(c);0-0-0
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • K(c);0-0-0,OGATEB::QAR1(A)
      • Refutation
        • R(b);P_PINQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);0-0-0::QAR1(A)
      • R(b);N_GUARD,XB(C)::QAR(A)
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