MESON Chess Problem Database

Problem Display
PID: 250 (5K2/5p2/5r2/8/p5Qb/8/1B1PR1R1/rB1k2nq w - - 0 1)

Mikan, Ilja

Straz lidu, 1950

5K2/5p2/5r2/8/p5Qb/8/1B1PR1R1/rB1k2nq

#2

7 + 8

5505 Dobrodruzstvi 64 poli 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb1
      • 2.Qxa4#
    • 1...Sxe2
      • 2.Qxe2#
    • 1...a3
      • 2.Qa4#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Bc2#
        • 2.Qc2#
      • 1...Qxg2
        • 2.Bc2#
      • 1...Rxb1
        • 2.Qxb1#
        • 2.Qxa4#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Rf2
        • 2.Bc2#
      • 1...Bf2
        • 2.Bc2#
      • 1...Rc6!
    • 1.d3?
      • threat
        • 2.Bc2#
      • 1...Rxb1
        • 2.Qxa4#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Rc6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Bc2#
        • 2.Qc1#
        • 2.Qc2#
      • 1...Qxg2
        • 2.Bc2#
      • 1...Rxb1
        • 2.Qxa4#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Rf2
        • 2.Bc2#
      • 1...Rc6
        • 2.Bc2#
      • 1...Bf2
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,XB(A)::QAB(F),XP(e)
    • S(c);OGATE,P_SPINS(c),XR(D)::QAB1(F),XS(c)
    • P(e);S_CUTR(a)::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);XR(E)::B(A)
        • S(c);OGATE,XR(D)::QAB1(F),XS(c)
        • R(g);::B(A)
        • B(f);::B(A)
      • Refutation
        • R(g);
    • Try
      • P(C);
      • Threat
        • B(A)
      • Vars
        • R(a);N_GUARD,XB(A)::QAB(F),XP(e)
        • S(c);OGATE,P_SPINS(c),XR(D)::QAB1(F),XS(c)
      • Refutation
        • R(g);
  • Actual
    • Q(F);
    • Threat
      • DUALS(3)
    • Vars
      • Q(d);XR(E)::B(A)
      • R(a);N_GUARD,XB(A)::QAB(F),XP(e)
      • S(c);OGATE,XR(D)::QAB1(F),XS(c)
      • R(g);::B(A)
      • B(f);::B(A)
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