MESON Chess Problem Database

Problem Display
PID: 86554 (2R5/4PK2/B1NpR3/3k1p1n/pP1B4/1q1P1r2/3Q3n/3N4 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Canadian Chess Chat, 1981

2R5/4PK2/B1NpR3/3k1p1n/pP1B4/1q1P1r2/3Q3n/3N4

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Bc4#
    • 1...Qa2
      • 2.Sc3#
      • 2.Qxa2#
    • 1...Qc4
      • 2.Bxc4#
      • 2.dxc4#
    • 1...Qb1
      • 2.Sc3#
      • 2.Bc4#
    • 1...Qb2
      • 2.Bc4#
    • 1...Qa3
      • 2.Bc4#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Rf1
      • 2.Se3#
    • 1...Rf2
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Rf4
      • 2.Se3#
  • Tries
    • 1.Be5?
      • threat
        • 2.Rxd6#
      • 1...Qxd3
        • 2.Sc3#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...dxe5
        • 2.Rd8#
      • 1...Rxd3!
    • 1.Qf4?
      • threat
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Rxf4
        • 2.Se3#
      • 1...Sxf4!
    • 1.Qg2?
      • threat
        • 2.Se3#
      • 1...Qxd1
        • 2.Bc4#
      • 1...Sf1
        • 2.Qxf3#
      • 1...Sg4
        • 2.Qxf3#
      • 1...f4
        • 2.Qg5#
      • 1...Qxd3!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Rxd6#
      • 1...Qxd3
        • 2.Sc3#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Rxd3
        • 2.Se3#
      • 1...dxc5
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD,XS(A)::B(F)
    • Q(b);N_GUARD::B(F)
    • Q(b);N_GUARD::S(A),XQ(b)
    • R(c);N_GUARD::S(A)
    • R(c);N_GUARD::S(A),XR(c)
  • Tries
    • Try
      • B(E);
      • Threat
        • R1(H),XP(h)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XP(C)::S(A)
        • Q(b);XP(D)::S(G),XQ(b)
        • P(h);OGATEB,XB(E)::R(K)
      • Refutation
        • R(c);P_SPINR(c),XP(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(D)::S(G),XQ(b)
        • R(c);N_GUARD,XQ(B)::S(A)
      • Refutation
        • S(g);XQ(B)
    • Try
      • Q(B);P_PINR(c)
      • Threat
        • S(A)
      • Vars
        • Q(b);N_GUARD,XS(A)::B(F)
        • S(a);N_GUARD::QAB(B),XR(c)
        • P(f);OGATEB::QAR(B)
      • Refutation
        • Q(b);XP(C)
  • Actual
    • B(E);
    • Threat
      • R1(H),XP(h)
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XP(C)::S(A)
      • Q(b);XP(D)::S(G),XQ(b)
      • R(c);N_GUARD,P_SPINR(c),XP(C)::S(A)
      • P(h);OGATEB,XB(E)::R(K)
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