MESON Chess Problem Database

Problem Display
PID: 125359 (7Q/3p4/N1npn3/3k1p2/3P4/N1p2p2/3R4/1BR2K2 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Source?, 1982

7Q/3p4/N1npn3/3k1p2/3P4/N1p2p2/3R4/1BR2K2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sa5
      • 2.Sb4#
    • 1...Se5
      • 2.Sb4#
    • 1...Sa7
      • 2.Sb4#
    • 1...Se7
      • 2.Sb4#
    • 1...Sb8
      • 2.Sb4#
    • 1...Scd8
      • 2.Sb4#
    • 1...Sf4
      • 2.Sc7#
    • 1...Sc5
      • 2.Sc7#
    • 1...Sg5
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
    • 1...Sed8
      • 2.Sc7#
    • 1...Sf8
      • 2.Sc7#
    • 1...f2
      • 2.Qh1#
  • Tries
    • 1.Rxc3?
      • 1...Scxd4
        • 2.Sb4#
      • 1...Sexd4
        • 2.Sc7#
      • 1...Sf4
        • 2.Sc7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sg5
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sg7
        • 2.Sc7#
      • 1...Sed8
        • 2.Sc7#
      • 1...Sf8
        • 2.Sc7#
      • 1...Sb4
        • 2.Sxb4#
      • 1...Sa5
        • 2.Sb4#
      • 1...Se5
        • 2.Sb4#
      • 1...Sa7
        • 2.Sb4#
      • 1...Se7
        • 2.Sb4#
      • 1...Sb8
        • 2.Sb4#
      • 1...Scd8
        • 2.Sb4#
      • 1...f2
        • 2.Qh1#
      • 1...f4!
    • 1.Qe5+?
      • 1...Sxe5
        • 2.Sb4#
      • 1...dxe5!
  • Keys
    • 1.Re1!
      • threat
        • 2.Ba2#
      • 1...Scxd4
        • 2.Qa8#
      • 1...Sb4
        • 2.Sxb4#
      • 1...Sa5
        • 2.Sb4#
      • 1...Se5
        • 2.Sb4#
      • 1...Sa7
        • 2.Sb4#
      • 1...Se7
        • 2.Sb4#
      • 1...Sb8
        • 2.Sb4#
      • 1...Scd8
        • 2.Sb4#
      • 1...Sc5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(e);N_GUARD::S(G),XS(e)
    • S(e);N_GUARD::S(G)
    • S(g);N_GUARD::S(G)
    • S(g);N_GUARD::S(G),XS(g)
    • P(b);OGATEB::QAB(H)
  • Tries
    • Try
      • R(B);XP(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e),XP(F)::S(G)
        • S(g);N_GUARD,P_SPINS(g),XP(F)::S(G)
        • S(g);N_GUARD::S(G)
        • S(g);N_GUARD::S(G),XS(g)
        • S(e);N_GUARD::S(G),XS(e)
        • S(e);N_GUARD::S(G)
        • P(b);OGATEB::QAB(H)
      • Refutation
        • P(d);
    • Try
      • Q(H);CHECK
      • Vars
        • S(e);XQ(H)::S(G)
      • Refutation
        • P(f);XQ(H)
  • Actual
    • R(B);
    • Threat
      • B(A)
    • Vars
      • S(e);OGATEB,P_SPINS(e),XP(F)::QAB(H)
      • S(e);N_GUARD::S(G),XS(e)
      • S(e);N_GUARD::S(G)
      • S(g);N_GUARD::S(G)
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