MESON Chess Problem Database

Problem Display
PID: 242213 (8/3p4/1n1k1N2/qp3p1r/3N4/b1R4n/8/1Q2RK2 w - - 0 1)

Kisis, Imants J

Sachove umeni (Ceskoslovensky sach), 1968

8/3p4/1n1k1N2/qp3p1r/3N4/b1R4n/8/1Q2RK2

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Sxb5#
    • 1...Qa8
      • 2.Sxb5#
    • 1...Rh4
      • 2.Sxf5#
    • 1...Rh6
      • 2.Sxf5#
    • 1...Rh7
      • 2.Sxf5#
    • 1...Rh8
      • 2.Sxf5#
    • 1...Sg5
      • 2.Sxf5#
    • 1...Sd5
      • 2.Se8#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Se8#
      • 1...Qxb5+
        • 2.Sxb5#
      • 1...Qa8
        • 2.Qe5#
      • 1...Rh8
        • 2.Sxf5#
      • 1...Bc5!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Se8#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Qa8
        • 2.Sxb5#
      • 1...Rh8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::S(E),XP(d)
    • R(f);N_GUARD::S(E),XP(e)
    • S(b);S_CUTR(f)::S(E),XP(e)
    • S(g);SBLOCK::S(F)
  • Tries
    • Try
      • Q(A);XP(d)
      • Threat
        • S(F)
      • Vars
        • Q(c);CHECK,XQ(A)::S(E),XQ(c)
        • Q(c);N_GUARD::QAB1(A)
        • R(f);N_GUARD::S(E),XP(e)
      • Refutation
        • B(a);
  • Actual
    • Q(A);XP(e)
    • Threat
      • S(F)
    • Vars
      • R(f);CHECK,XQ(A)::S(E),XR(f)
      • Q(c);N_GUARD::S(E),XP(d)
      • R(f);N_GUARD::QAB1(A)
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