MESON Chess Problem Database

Problem Display
PID: 252656 (1K6/2Np2B1/Np1kp2n/1P3b2/Rp1p3Q/8/2P4b/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

Zadachi i Etyudi, 2005

1K6/2Np2B1/Np1kp2n/1P3b2/Rp1p3Q/8/2P4b/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Bf8#
    • 1...b3
      • 2.Rxd4#
    • 1...d3
      • 2.Qxb4#
    • 1...e5
      • 2.Bf8#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Bf8#
        • 2.Qxb4#
      • 1...Be4
        • 2.Qxb4#
      • 1...Sg8
        • 2.Qxb4#
      • 1...b3
        • 2.Bf8#
        • 2.Qb4#
      • 1...Ke7!
    • 1.Qf6?
      • threat
        • 2.Bf8#
        • 2.Qf8#
      • 1...Sf7
        • 2.Bf8#
      • 1...Sg8!
    • 1.Qxh2+?
      • 1...e5
        • 2.Bf8#
        • 2.Qxe5#
      • 1...Ke7!
    • 1.c4?
      • threat
        • 2.Se8#
      • 1...bxc4 ep
        • 2.Rxd4#
      • 1...dxc4 ep
        • 2.Qxb4#
      • 1...e5
        • 2.Bf8#
      • 1...Bg6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sb7#
      • 1...Kxc5
        • 2.Qxd4#
      • 1...bxc5
        • 2.Ra6#
      • 1...Be4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::B(G)
    • P(b);OGATE::R(B),XP(c)
    • P(c);OGATE::QAB(C),XP(b)
    • P(g);SBLOCK::B(G)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAB(C),XP(b)
        • S(h);::QAB(C),XP(b)
      • Refutation
        • K(f);P_PINS(F),P_SPINP(g),S_FLIGHT
    • Try
      • Q(C);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);::B(G)
      • Refutation
        • S(h);
    • Try
      • Q(C);CHECK,XB(a)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • P(A);
      • Threat
        • S(F)
      • Vars
        • P(b);EP,OGATE,XP(A)::R(B),XP(c)
        • P(c);EP,OGATE,XP(A)::QAB(C),XP(b)
        • P(g);SBLOCK::B(G)
      • Refutation
        • B(d);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(f);N_GUARD,P_PINS(F),S_FLIGHT,XS(E)::QAB1(C),XP(c)
      • P(e);OGATEB,SBLOCK,XS(E)::R(B)
      • B(d);N_GUARD::S(E),XB(d)
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