MESON Chess Problem Database

Problem Display
PID: 87784 (8/8/8/8/q1nN4/8/1R6/k1KB4 w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Problemist Pribuzhya, 1992

8/8/8/8/q1nN4/8/1R6/k1KB4

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2+
      • 2.Sxc2#
    • 1...Qb3
      • 2.Sxb3#
    • 1...Qb5
      • 2.Sc2#
    • 1...Qc6
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qd7
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qe8
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qa2
      • 2.Sc2#
    • 1...Qa3
      • 2.Sc2#
    • 1...Qb4
      • 2.Sc2#
    • 1...Qa5
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qa6
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qa7
      • 2.Sc2#
      • 2.Sb3#
    • 1...Qa8
      • 2.Sc2#
      • 2.Sb3#
  • Tries
    • 1.Bxa4?
      • threat
        • 2.Sc2#
        • 2.Sb3#
      • 1...Sd2
        • 2.Sc2#
      • 1...Sa3
        • 2.Sb3#
      • 1...Se3
        • 2.Sb3#
      • 1...Sa5
        • 2.Sc2#
      • 1...Sxb2!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Sc2#
        • 2.Rb1#
      • 1...Qxb3
        • 2.Sxb3#
      • 1...Sxb2
        • 2.Sc2#
      • 1...Qa2
        • 2.Sc2#
        • 2.Rxa2#
      • 1...Qa3
        • 2.Sc2#
      • 1...Sd2
        • 2.Sc2#
      • 1...Sa3
        • 2.Ra2#
      • 1...Se3
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(b);CHECK,N_GUARD::S(D),XQ(b)
    • Q(b);N_GUARD::S(D),XQ(b)
    • Q(b);N_GUARD::S(D)
    • Q(b);N_GUARD,P_PINR(C)::S(D)
  • Tries
    • Try
      • B(B);XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::S(D)
      • Refutation
        • S(c);XR(C)
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);XB(B)::S(D),XQ(b)
      • S(c);XR(C)::S(D)
      • Q(b);P_PINR(C)::S(D)
      • S(c);::S(D)
      • S(c);S_CUTQ(b)::R1(C)
      • S(c);::R1(C)
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