MESON Chess Problem Database

Problem Display
PID: 263755 (4RB2/2qB1p1b/R1N2P1n/1p1k2p1/3pn1N1/1P3Qp1/2Kb1p2/8 w - - 0 1)

Nanning, Frederik Willem

4th HM., Tijdschrift vd NSB, 1929

4RB2/2qB1p1b/R1N2P1n/1p1k2p1/3pn1N1/1P3Qp1/2Kb1p2/8

#2

10 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Re5#
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qb6
      • 2.Re5#
    • 1...Qd8
      • 2.Re5#
    • 1...Qxc6+
      • 2.Bxc6#
    • 1...Qa7
      • 2.Re5#
    • 1...Qb7
      • 2.Re5#
    • 1...Qxd7
      • 2.Re5#
    • 1...Qc8
      • 2.Re5#
    • 1...Bg8
      • 2.Qxe4#
    • 1...Sf5
      • 2.Qxe4#
    • 1...d3+
      • 2.Qxd3#
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxd4#
      • 1...Qxc6+
        • 2.Bxc6#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...Sd6
        • 2.Re5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Qb6
        • 2.Re5#
      • 1...Qa7
        • 2.Re5#
      • 1...Bc3
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#
      • 1...Sc3
        • 2.Sb4#
      • 1...Sc5
        • 2.Se7#
      • 1...Sf5
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(j);N_GUARD,N_PINS(F)::R1(I)
    • Q(j);N_GUARD,N_PINS(F)::R1(I),XQ(j)
    • Q(j);CHECK,OGATE,XS(F)::B(H),XQ(j)
    • Q(j);N_GUARD,N_PINS(F),XB(H)::R1(I)
    • Q(j);N_GUARD::R1(I)
    • B(l);N_GUARD::QAB1(C),XS(e)
    • S(i);S_CUTB(l)::QAB1(C),XS(e)
    • P(d);CHECK,OGATEB::QAR2(C),XP(d)
  • Actual
    • Q(C);N_PINS(e),P_PINP(d)
    • Threat
      • QAR1(C),XP(d)
    • Vars
      • Q(j);CHECK,OGATE,XS(F)::B(H),XQ(j)
      • S(e);P_PINQ(C),XP(G)::S(D),XS(e)
      • S(e);P_PINQ(C),S_CUTQ(j)::R1(I)
      • Q(j);N_GUARD,N_PINS(F)::R1(I),XQ(j)
      • Q(j);N_GUARD,N_PINS(F)::R1(I)
      • B(a);N_GUARD,N_PINS(F)::S(D)
      • B(a);N_GUARD::S(D),XB(a)
      • S(e);N_PINS(F),P_PINQ(C)::S(F)
      • S(e);N_PINS(F),P_PINQ(C),SBLOCK::S(F)
      • S(i);S_CUTB(l)::QAB1(C),XS(e)
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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).