MESON Chess Problem Database

Problem Display
PID: 119963 (k7/1Rp5/N1B2pK1/1nq2pb1/8/n7/1Q6/8 w - - 0 1)

Mikan, Ilja

Vecherni Praha, 1962

k7/1Rp5/N1B2pK1/1nq2pb1/8/n7/1Q6/8

#2

5 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Rxc7#
    • 1...Qf2
      • 2.Rxc7#
    • 1...Qe3
      • 2.Rxc7#
    • 1...Qb4
      • 2.Rxc7#
    • 1...Qd4
      • 2.Rxc7#
    • 1...Qa7
      • 2.Rb8#
    • 1...Qe7
      • 2.Rxc7#
    • 1...Qf8
      • 2.Rxc7#
    • 1...Qe5
      • 2.Rxc7#
    • 1...Sc3
      • 2.Sxc7#
    • 1...Sd4
      • 2.Sxc7#
    • 1...Sd6
      • 2.Sxc7#
    • 1...Sa7
      • 2.Sxc7#
      • 2.Rb8#
  • Tries
    • 1.Qxa3?
      • threat
        • 2.Sxc7#
      • 1...Qxa3
        • 2.Rxc7#
      • 1...Qa7
        • 2.Rb8#
      • 1...Qxc6!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qd8#
      • 1...Qxd4
        • 2.Rxc7#
      • 1...Qxc6
        • 2.Rb8#
      • 1...Sxd4
        • 2.Sxc7#
      • 1...Qd6
        • 2.Ra7#
        • 2.Rb8#
      • 1...Qa7
        • 2.Rxa7#
        • 2.Rb8#
      • 1...Qe7
        • 2.Rxb5#
        • 2.Ra7#
        • 2.Rxc7#
        • 2.Rb8#
      • 1...Qf8
        • 2.Rxb5#
        • 2.Ra7#
        • 2.Rxc7#
        • 2.Rb8#
      • 1...Qd5
        • 2.Ra7#
        • 2.Rb8#
      • 1...Sd6
        • 2.Sxc7#
      • 1...Sa7
        • 2.Sxc7#
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::B(C)+R(E),XP(g)
    • Q(c);SBLOCK::B(C)+R(E),DCHECK
    • S(b);N_GUARD::S(B),XP(g)
  • Tries
    • Try
      • Q(A);XS(a)
      • Threat
        • QAR(A)+S(B),DCHECK,XP(g)
      • Vars
        • Q(c);N_GUARD,XQ(A)::B(C)+R(E),XP(g)
        • Q(c);SBLOCK::B(C)+R(E),DCHECK
      • Refutation
        • Q(c);XB(C)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(c);N_GUARD,XQ(A)::B(C)+R(E),XP(g)
      • Q(c);XB(C)::R1(E)
      • S(b);N_GUARD,XQ(A)::S(B),XP(g)
      • S(b);N_GUARD::S(B),XP(g)
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