MESON Chess Problem Database

Problem Display
PID: 179887 (1bBrRQb1/8/1N2n3/1p2q1Rr/3PkpPp/1N6/K1P3P1/2B5 w - - 0 1)

Gross, Erwin

Probleemblad, 1982

1bBrRQb1/8/1N2n3/1p2q1Rr/3PkpPp/1N6/K1P3P1/2B5

#2

12 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Qf5#
    • 1...Qd6
      • 2.Qf5#
    • 1...Qc7
      • 2.Qf5#
    • 1...Qg7
      • 2.Qf5#
    • 1...Qh8
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Sxd4
      • 2.Qxf4#
    • 1...Sc5
      • 2.Bf5#
      • 2.Qxf4#
      • 2.Qf5#
    • 1...Sxg5
      • 2.Bf5#
      • 2.Qxf4#
      • 2.Qf5#
    • 1...Sc7
      • 2.Bf5#
      • 2.Rexe5#
      • 2.Qxf4#
      • 2.Qf5#
    • 1...Sg7
      • 2.Qxf4#
    • 1...Sxf8
      • 2.Bf5#
    • 1...f3
      • 2.Qxf3#
      • 2.gxf3#
  • Tries
    • 1.Bb7+?
      • 1...Qd5
        • 2.Qf5#
      • 1...Rd5!
    • 1.Qxf4+?
      • 1...Sxf4
        • 2.Bf5#
      • 1...Qxf4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe1#
      • 1...Qxd4
        • 2.Sc5#
      • 1...Sxd4
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD,P_SPINS(g),XP(F)::QAB1(L)
    • Q(e);N_GUARD,P_SPINS(g)::QAB1(L)
    • Q(e);N_GUARD,P_SPINS(g)::QAB1(L),XQ(e)
    • S(g);N_GUARD,P_PINS(E),P_SPINQ(e),XP(F)::QAR1(L),XP(b)
    • S(g);N_GUARD,P_PINS(E),P_SPINQ(e)::QAR1(L),XP(b)
    • S(g);OGATE,P_PINS(E),P_SPINQ(e),XQ(L)::B(J)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • Q(e);P_PINS(E),P_SPINQ(e),P_SPINS(g)::QAB1(L)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • Q(L);CHECK,XP(b)
      • Vars
        • S(g);OGATE,P_PINS(E),P_SPINQ(e),XQ(L)::B(J)
      • Refutation
        • Q(e);P_SPINS(g),XQ(L)
  • Actual
    • Q(L);
    • Threat
      • QAR(L)
    • Vars
      • Q(e);N_GUARD,P_SPINQ(e),P_SPINS(g),XP(F)::S(E)
      • S(g);OGATE,P_PINS(E),P_SPINQ(e),P_SPINS(g),XP(F)::B(J)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).