MESON Chess Problem Database

Problem Display
PID: 64767 (q1Q5/5Pn1/p4PKp/r1pp2p1/N3kp2/R3PN2/2P3P1/b4B2 w - - 0 1)

Antonov, Yuri Mikhailovich

Shedey, Sergey Oleksandrovich

2nd Prize, Hlas l'udu, 1981

q1Q5/5Pn1/p4PKp/r1pp2p1/N3kp2/R3PN2/2P3P1/b4B2

#2

11 + 11

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Sd2#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
    • 1...Se8
      • 2.Qf5#
    • 1...fxe3
      • 2.Qg4#
    • 1...d4
      • 2.Qxa8#
  • Tries
    • 1.Sxg5+?
      • 1...Ke5
        • 2.Qc7#
      • 1...hxg5!
    • 1.Qe6+?
      • 1...Be5
        • 2.Sd2#
        • 2.Qxe5#
      • 1...Sxe6!
    • 1.Qc7?
      • threat
        • 2.Sd2#
      • 1...fxe3
        • 2.Bd3#
      • 1...d4
        • 2.Qe5#
      • 1...Bc3!
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Bd3#
      • 1...Rxc5
        • 2.Sxc5#
      • 1...fxe3
        • 2.Qxe3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...d4
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::S(F)
    • S(j);N_GUARD::QAB1(K),XS(j)
    • S(j);N_GUARD::QAB1(K)
    • P(c);OGATEB,XP(E)::QAR2(K)
    • P(f);OGATEB::QAB(K),XQ(k)
  • Tries
    • Try
      • S(F);CHECK,XP(g)
      • Vars
        • K(b);P-FLIGHT::QAB(K)
      • Refutation
        • P(i);XS(F)
    • Try
      • Q(K);CHECK
      • Refutation
        • S(j);XQ(K)
    • Try
      • Q(K);
      • Threat
        • S(F)
      • Vars
        • P(c);SBLOCK,XP(E)::B(A)
        • P(f);S_CUTB(a)::QAR1(K)
      • Refutation
        • B(a);
  • Actual
    • Q(K);XP(e)
    • Threat
      • B(A)
    • Vars
      • R(d);XQ(K)::S(G),XR(d)
      • P(c);OGATE,XP(E)::QAR1(K),XP(c)
      • B(a);N_GUARD::QAR1(K),XB(a)
      • P(f);::S(F)
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