MESON Chess Problem Database

Problem Display
PID: 242595 (8/8/B1pp1n1Q/3kbP2/8/B1PN1K2/8/8 w - - 0 1)

Antonov, Yuri Mikhailovich

Tidskrift for Schack, 1979

8/8/B1pp1n1Q/3kbP2/8/B1PN1K2/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.c4#
    • 1...Se4
      • 2.Qe6#
    • 1...Sg4
      • 2.Qe6#
    • 1...Sh5
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
    • 1...Sg8
      • 2.Qe6#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Sf4#
        • 2.Qa2#
      • 1...c5
        • 2.Sb4#
      • 1...Bh2
        • 2.Qa2#
      • 1...Bg3
        • 2.Qa2#
      • 1...Bd4
        • 2.Qa2#
        • 2.c4#
      • 1...Bf4
        • 2.Qa2#
      • 1...Bxc3!
    • 1.Qe3?
      • threat
        • 2.Sb4#
        • 2.c4#
      • 1...Bxc3
        • 2.Sf4#
      • 1...Bd4
        • 2.Sf4#
        • 2.Qxd4#
        • 2.Qe6#
        • 2.c4#
      • 1...c5!
    • 1.Qf4?
      • threat
        • 2.Bc4#
        • 2.Qc4#
        • 2.c4#
      • 1...Bxc3
        • 2.Bc4#
        • 2.Qxd6#
        • 2.Qc4#
      • 1...c5
        • 2.Bb7#
      • 1...Bd4
        • 2.Qxd6#
        • 2.Qxd4#
        • 2.c4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Bxf4!
    • 1.Qg7?
      • threat
        • 2.Qf7#
      • 1...c5
        • 2.Qb7#
      • 1...Bxc3!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf7#
      • 1...Bxc3
        • 2.Qxd6#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(b);SBLOCK::P(B)
    • S(e);OGATE::QAB1(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR(G)+S(C),DCHECK
        • B(b);::QAB(G)
      • Refutation
        • B(b);XP(B)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);N_GUARD,XP(B)::S(C)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);OGATEB::B(F)
        • S(e);N_GUARD::QAB1(G),XS(e)
      • Refutation
        • B(b);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • P(c);OGATEB::QAB(G)
      • Refutation
        • B(b);XP(B)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • B(b);N_GUARD,XP(B)::QAR1(G),XP(d)
      • P(c);OGATEB::QAB(G)
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