MESON Chess Problem Database

Problem Display
PID: 180304 (8/B2Pp3/3pP3/1Kp5/4N1N1/RpPk2p1/3p2BP/2bQ4 w - - 0 1)

Lider, Valentin Viktorovich

3rd Prize, Wiesbadener Schachverein-100 JT, 1985

8/B2Pp3/3pP3/1Kp5/4N1N1/RpPk2p1/3p2BP/2bQ4

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxd2#
    • 1...Bxa3
      • 2.Qxd2#
  • Tries
    • 1.Sgf2+?
      • 1...Ke3
        • 2.Qf3#
      • 1...gxf2!
    • 1.Se5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...dxe5!
    • 1.Rxb3?
      • 1...gxh2
        • 2.Sef2#
      • 1...Bb2
        • 2.Qxd2#
      • 1...Ba3
        • 2.Qxd2#
      • 1...d5
        • 2.Sxc5#
      • 1...c4!
    • 1.hxg3?
      • 1...Bxa3
        • 2.Qxd2#
      • 1...b2
        • 2.Sef2#
      • 1...Bb2
        • 2.Qxd2#
      • 1...c4
        • 2.Sgf2#
      • 1...d5!
    • 1.d8Q?
      • 1...Bxa3
        • 2.Qxd2#
      • 1...b2
        • 2.Sxc5#
      • 1...Bb2
        • 2.Qxd2#
      • 1...c4
        • 2.Se5#
      • 1...d5
        • 2.Qxd5#
      • 1...gxh2!
    • 1.d8R?
      • 1...Bxa3
        • 2.Qxd2#
      • 1...b2
        • 2.Sxc5#
      • 1...Bb2
        • 2.Qxd2#
      • 1...c4
        • 2.Se5#
      • 1...d5
        • 2.Rxd5#
      • 1...gxh2!
  • Keys
    • 1.Bxc5!
      • 1...Bxa3
        • 2.Qxd2#
      • 1...gxh2
        • 2.Sgf2#
      • 1...dxc5
        • 2.d8Q#
        • 2.d8R#
      • 1...b2
        • 2.c4#
      • 1...Bb2
        • 2.Qxd2#
      • 1...d5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(A),XP(b)
    • B(a);N_GUARD,XR(D)::QAR1(A),XP(b)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • P(e);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • P(g);XS(G)
    • Try
      • R(D);XP(c)
      • Vars
        • P(e);N_GUARD,XP(C)::S(F)
        • B(a);N_GUARD::QAR1(A),XP(b)
        • P(g);N_GUARD::S(F),XP(f)
      • Refutation
        • P(f);
    • Try
      • P(C);XP(e)
      • Vars
        • B(a);N_GUARD,XR(D)::QAR1(A),XP(b)
        • P(c);::S(F)
        • B(a);N_GUARD::QAR1(A),XP(b)
        • P(f);::S(G)
      • Refutation
        • P(g);
    • Try
      • P(K);
      • Vars
        • B(a);N_GUARD,XR(D)::QAR1(A),XP(b)
        • P(c);::S(F),XP(f)
        • B(a);N_GUARD::QAR1(A),XP(b)
        • P(f);::S(G)
        • P(g);OGATE::QAR2(K),XP(g)
      • Refutation
        • P(e);XP(C)
    • Try
      • P(K);
      • Vars
        • B(a);N_GUARD,XR(D)::QAR1(A),XP(b)
        • P(c);::S(F),XP(f)
        • B(a);N_GUARD::QAR1(A),XP(b)
        • P(f);::S(G)
        • P(g);OGATE::R(K),XP(g)
      • Refutation
        • P(e);XP(C)
  • Actual
    • B(J);XP(f)
    • Vars
      • B(a);N_GUARD,XR(D)::QAR1(A),XP(b)
      • P(e);N_GUARD,XP(C)::S(G)
      • P(g);XB(J)::P=Q
      • P(c);::R(D)+P(E)
      • B(a);N_GUARD::QAR1(A),XP(b)
      • P(g);N_GUARD::S(G)
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