MESON Chess Problem Database

Problem Display
PID: 61198 (3N4/1K1N4/3b4/2PkBp1r/2p1p3/8/n2P2n1/3Q4 w - - 0 1)

Chepizhni, Viktor Ivanovich

Uralski Problemist, 2004

3N4/1K1N4/3b4/2PkBp1r/2p1p3/8/n2P2n1/3Q4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.dxc3#
    • 1...Se3
      • 2.dxe3#
    • 1...c3
      • 2.Qb3#
    • 1...e3
      • 2.Qf3#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...Bxc5
        • 2.Sf6#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...c3
        • 2.Qxa2#
      • 1...Sc3!
    • 1.d4?
      • threat
        • 2.Sb6#
        • 2.Sf6#
      • 1...Bxc5
        • 2.Sf6#
        • 2.dxc5#
      • 1...Bxe5
        • 2.Sb6#
        • 2.dxe5#
      • 1...cxd4 ep
        • 2.Qb3#
      • 1...exd4 ep
        • 2.Qf3#
      • 1...c3
        • 2.Sb6#
        • 2.Qb3#
      • 1...e3
        • 2.Sf6#
        • 2.Qf3#
      • 1...Rh6
        • 2.Sb6#
      • 1...Bc7
        • 2.Sf6#
      • 1...Be7
        • 2.Sb6#
      • 1...Rh7!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qd4#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...Bxe5
        • 2.Sb6#
      • 1...e3
        • 2.Qxg2#
      • 1...Se3
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE::QAR(A)+P(B),XS(a)
    • S(b);OGATE::QAR(A)+P(B),XS(b)
    • P(c);OGATEB::QAB(A)
    • P(d);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(h);SBLOCK,XP(C)::S(F)
        • B(h);OGATE,XB(D)::QAR1(A),XB(h)
        • P(c);OGATEB::QAB(A),XS(a)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);EP,OGATEB,P_SPINP(c),XP(B)::QAB(A)
        • P(d);EP,OGATEB,P_SPINP(d),XP(B)::QAB(A)
        • R(g);::S(F)
        • B(h);::S(F)
      • Refutation
        • R(g);P_PINS(F)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(h);OGATE,XP(C)::QAR1(A),XB(h)
      • B(h);SBLOCK,XB(D)::S(F)
      • P(d);OGATEB::QAB(A),XS(b)
      • S(b);OGATE::QAB(A)
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