MESON Chess Problem Database

Problem Display
PID: 267373 (B3RB2/4pb2/K1N3Pb/3P3q/RN2k3/3pP3/3P1Q2/8 w - - 0 1)

Rozijn, DA

Schakend Nederland, 1979

B3RB2/4pb2/K1N3Pb/3P3q/RN2k3/3pP3/3P1Q2/8

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qxf4#
    • 1...Bg7
      • 2.Qf4#
    • 1...Bxf8
      • 2.Qf4#
  • Tries
    • 1.Rxe7+?
      • 1...Qe5
        • 2.Rxe5#
      • 1...Be6!
  • Keys
    • 1.Sxe7!
      • threat
        • 2.Sbc6#
      • 1...Ke5
        • 2.Sec6#
      • 1...Qxd5
        • 2.Qf5#
      • 1...Bxe3
        • 2.Qxe3#
      • 1...Bxd5
        • 2.Sf5#
      • 1...Qd1
        • 2.Qf5#
      • 1...Qe5
        • 2.Qg2#
      • 1...Bg7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::QAR1(B),XB(d)
    • B(d);N_GUARD::QAR1(B)
    • B(d);N_GUARD,XB(L)::QAR1(B)
  • Tries
    • Try
      • R(K);CHECK,XP(e)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::R1(K),XQ(c)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • S(H);XP(e)
    • Threat
      • R(D)+S(E)
    • Vars
      • K(b);P-FLIGHT::R(K)+S(H),DCHECK
      • Q(c);N_GUARD,P_SPINQ(c),XP(F)::QAB1(B)
      • B(d);OGATE,XP(C)::QAR1(B),XB(d)
      • B(f);N_GUARD,P_SPINB(f),XP(F)::R(K)+S(H)
      • Q(c);N_GUARD::QAB1(B)
      • Q(c);N_GUARD,SBLOCK::QAB(B)
      • B(d);N_GUARD::QAR1(B)
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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).