MESON Chess Problem Database

Problem Display
PID: 99019 (n2K4/3pPB2/2pk1n2/2pp2p1/2p1prN1/4N3/8/7Q w - - 0 1)

Bakcsi, Gyorgy

Levelezesi Sakkhirado, 1985

n2K4/3pPB2/2pk1n2/2pp2p1/2p1prN1/4N3/8/7Q

#2

6 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sxf5#
    • 1...Sh5
      • 2.e8S#
    • 1...Sh7
      • 2.e8S#
    • 1...Sg8
      • 2.e8S#
    • 1...d4
      • 2.Sxc4#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Rxg4
        • 2.Sf5#
        • 2.Qxf6#
      • 1...Sxg4
        • 2.e8S#
      • 1...Rf5
        • 2.Sxf5#
      • 1...d4
        • 2.Sxc4#
      • 1...c3!
    • 1.Qd1?
      • threat
        • 2.Sxc4#
      • 1...c3
        • 2.Sc4#
      • 1...Sb6!
    • 1.Qh6?
      • threat
        • 2.e8S#
      • 1...Rxg4
        • 2.Qxf6#
      • 1...Sc7!
    • 1.e8Q?
      • threat
        • 2.Qe5#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Rxg4
        • 2.Sf5#
        • 2.Qe7#
      • 1...Sxg4
        • 2.Qe7#
      • 1...Rf5
        • 2.Sxf5#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Sh7
        • 2.Qxd7#
        • 2.Qe5#
        • 2.Qe7#
      • 1...Sg8
        • 2.Qxd7#
        • 2.Qe5#
      • 1...Sxe8!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Qe5#
      • 1...Rxe4
        • 2.Sf5#
      • 1...Rxg4
        • 2.Sf5#
      • 1...Sxe4
        • 2.e8S#
      • 1...Sxg4
        • 2.e8S#
      • 1...dxe4
        • 2.Sxc4#
      • 1...Rf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::S(B),XR(c)
    • S(i);N_GUARD::P=S
    • P(e);N_GUARD::S(B),XP(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(i);N_GUARD,XS(C)::P=S
        • R(c);N_GUARD::S(B),XR(c)
        • P(e);N_GUARD::S(B),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);P_PINP(e)
      • Threat
        • S(B),XP(a)
      • Vars
        • P(a);::S(B)
      • Refutation
        • S(k);
    • Try
      • Q(A);P_PINS(i)
      • Threat
        • P=S
      • Vars
        • R(c);N_GUARD,XS(C)::QAR2(A),XS(i)
      • Refutation
        • S(k);
    • Try
      • P(D);
      • Threat
        • DUALS(3)
      • Vars
        • S(i);XS(C)::QAB1(D)
      • Refutation
        • S(i);XQ(D)
  • Actual
    • Q(A);XP(b)
    • Threat
      • QAB1(A)
    • Vars
      • R(c);N_GUARD,XQ(A)::S(B)
      • R(c);N_GUARD,XS(C)::S(B)
      • S(i);N_GUARD,XQ(A)::P=S
      • S(i);N_GUARD,XS(C)::P=S
      • P(e);N_GUARD,XQ(A)::S(B),XP(a)
      • R(c);N_GUARD::S(B),XR(c)
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