MESON Chess Problem Database

Problem Display
PID: 86618 (3N2BK/3pBN2/3P1p2/3k1p1Q/2Rp1r2/1P1n1P2/2R5/8 w - - 0 1)

Gavriliv, Evgeni M

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Canadian Chess Chat, 1981

3N2BK/3pBN2/3P1p2/3k1p1Q/2Rp1r2/1P1n1P2/2R5/8

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Qxf3#
    • 1...Sc1
      • 2.Rc5#
    • 1...Se1
      • 2.Rc5#
    • 1...Sb2
      • 2.Rc5#
    • 1...Sf2
      • 2.Rc5#
    • 1...Sb4
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
    • 1...Se5
      • 2.Rc5#
  • Tries
    • 1.Re2?
      • threat
        • 2.Se5#
        • 2.Sg5#
        • 2.Sh6#
      • 1...Re4
        • 2.fxe4#
      • 1...Rg4
        • 2.Sg5#
      • 1...Se5
        • 2.Sxe5#
      • 1...Sc5!
    • 1.Qxf5+?
      • 1...Se5
        • 2.Sxe5#
        • 2.Sg5#
        • 2.Sh6#
        • 2.Rc5#
      • 1...Rxf5!
  • Keys
    • 1.Qh2!
      • 1...Rh4+
        • 2.Sh6#
      • 1...Rxf3
        • 2.Sg5#
      • 1...Re4
        • 2.Se5#
      • 1...Rg4
        • 2.Sg5#
      • 1...Sc1
        • 2.Rc5#
      • 1...Se1
        • 2.Rc5#
      • 1...Sb2
        • 2.Rc5#
      • 1...Sf2
        • 2.Rc5#
      • 1...Sb4
        • 2.Rc5#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Se5
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XP(C)::QAB(E),XR(c)
    • S(a);N_GUARD::R1(D)
    • S(a);N_GUARD::R1(D),XS(a)
    • S(a);N_GUARD,N_SPINP(e)::R1(D)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • R(c);OGATE::P(C),XR(c)
        • R(c);::B(J)+S(H)
        • S(a);N_SPINP(e)::B(J)+S(H),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK,XP(e)
      • Refutation
        • R(c);XQ(E)
  • Actual
    • Q(E);N_PINP(e)
    • Vars
      • R(c);CHECK::B(J)+S(H)
      • R(c);XP(C)::B(J)+S(H)
      • R(c);::B(J)+S(H)
      • S(a);N_GUARD::R1(D)
      • S(a);N_GUARD::R1(D),XS(a)
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