MESON Chess Problem Database

Problem Display
PID: 227336 (Q2R4/2P1q3/3n1RP1/1n1P1NB1/1PN1k1K1/8/4B3/8 w - - 0 1)

Vukcevich, Milan Radoje

US Problem Bulletin, 1986

Q2R4/2P1q3/3n1RP1/1n1P1NB1/1PN1k1K1/8/4B3/8

#2

12 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd8
      • 2.Re6#
    • 1...Qf8
      • 2.Re6#
    • 1...Qe5
      • 2.Sd2#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qxc7
      • 2.Re6#
    • 1...Qh7
      • 2.Re6#
    • 1...Sd4
      • 2.Sg3#
    • 1...Sf7
      • 2.d6#
    • 1...Sc8
      • 2.d6#
    • 1...Se8
      • 2.d6#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Sd2#
      • 1...Sxc4
        • 2.d6#
      • 1...Sxf5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qh1#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Sxc4
        • 2.Sg3#
      • 1...Sxf5
        • 2.Sd2#
      • 1...Qh7
        • 2.Qe5#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(d);N_GUARD,XR(L)::R(H)
    • Q(d);N_GUARD::R(H)
    • Q(d);SBLOCK::S(C)
    • Q(d);N_GUARD,P_PINS(F)::R(H),XQ(d)
    • Q(d);N_GUARD,XP(J)::R(H)
    • S(b);SBLOCK::S(F)
    • S(c);OGATE::QAB(K)+P(E)
  • Tries
    • Try
      • B(G);
      • Threat
        • S(C)
      • Vars
        • S(c);OGATE,XS(C)::QAB(K)+P(E)
      • Refutation
        • S(c);XS(F)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)
    • Vars
      • K(a);OGATEB,P_SPINS(c),S_FLIGHT,XP(E)::QAB(K)
      • S(c);XS(C)::S(F)
      • S(c);XS(F)::S(C)
      • Q(d);N_GUARD::QAR1(K)
      • S(b);N_GUARD::QAR1(K),XS(b)
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