MESON Chess Problem Database

Problem Display
PID: 41421 (KR1R4/7Q/8/p3b3/1NpN1p2/1bk2p2/5n2/2B1nB2 w - - 0 1)

Rudenko, Valentin Fedorovich

Shedey, Sergey Oleksandrovich

1st Prize, Sachove umeni (Ceskoslovensky sach), 1983

KR1R4/7Q/8/p3b3/1NpN1p2/1bk2p2/5n2/2B1nB2

#2

8 + 9

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Sa2#
    • 1...Ba2
      • 2.Sxa2#
    • 1...Bc2
      • 2.Sa2#
    • 1...Ba4
      • 2.Sa2#
    • 1...Bxd4
      • 2.Sd5#
    • 1...axb4
      • 2.Sb5#
  • Tries
    • 1.Qc2+?
      • 1...Bxc2
        • 2.Sa2#
      • 1...Sxc2!
    • 1.Qe4?
      • threat
        • 2.Sd5#
        • 2.Qxe1#
      • 1...axb4
        • 2.Sb5#
        • 2.Qxe1#
      • 1...Sed3
        • 2.Sd5#
      • 1...Bd6
        • 2.Sd5#
      • 1...Sc2
        • 2.Sd5#
      • 1...Sg2
        • 2.Sd5#
      • 1...Sfd3
        • 2.Sd5#
      • 1...Sxe4!
    • 1.Qe7?
      • threat
        • 2.Sb5#
      • 1...Bxd4
        • 2.Qxe1#
      • 1...axb4
        • 2.Qxb4#
      • 1...Bd1
        • 2.Sa2#
      • 1...Ba2
        • 2.Sxa2#
      • 1...Bc2
        • 2.Sa2#
      • 1...Ba4
        • 2.Sa2#
      • 1...Bd6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Sd5#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...axb4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::S(C)
    • B(c);N_GUARD::S(C),XB(c)
    • B(i);SBLOCK,XS(D)::S(C)
    • P(h);SBLOCK,XS(C)::S(D)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • B(c);XQ(E)::S(C)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(C)
        • B(i);::S(C)
        • S(b);::S(C)
      • Refutation
        • S(b);XQ(E)
    • Try
      • Q(E);
      • Threat
        • S(D)
      • Vars
        • B(i);OGATE,XS(D)::QAB(E),XS(a)
        • P(h);OGATE,XS(C)::QAB1(E),XP(h)
        • B(c);N_GUARD::S(C)
        • B(c);N_GUARD::S(C),XB(c)
      • Refutation
        • B(i);
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • B(i);OGATE,XS(D)::QAB1(E),XB(i)
      • P(h);OGATE,XS(C)::QAB(E)
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