MESON Chess Problem Database

Problem Display
PID: 138983 (2b1R3/8/2Np1Pp1/3p1k2/R4P2/5pQP/K1P3rn/BBb2Nr1 w - - 0 1)

Salonen, S

The Problemist, 1936

2b1R3/8/2Np1Pp1/3p1k2/R4P2/5pQP/K1P3rn/BBb2Nr1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Rd2
      • 2.Se3#
    • 1...Bd2
      • 2.c4#
    • 1...Ba3
      • 2.Se3#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bxf4
      • 2.Rxf4#
      • 2.Qxf4#
    • 1...Be6
      • 2.Se7#
    • 1...Sg4
      • 2.hxg4#
    • 1...f2
      • 2.Qd3#
      • 2.c4#
  • Keys
    • 1.Qh4!
      • threat
        • 2.Sd4#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...g5
        • 2.Qh7#
      • 1...Rd2
        • 2.Se3#
      • 1...Rg4
        • 2.c3#
      • 1...Rg5
        • 2.c4#
      • 1...Bb2
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#
      • 1...Be6
        • 2.Se7#
      • 1...Sg4
        • 2.Qg5#
      • 1...d4
        • 2.Sxd4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(B),XR(c)
    • R(c);S_CUTB(a)::S(C)
    • B(a);N_PINP(E)::B(B)+P(E)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(j);SBLOCK::S(J)
    • S(d);OGATE::P(G),XS(d)
  • Actual
    • Q(F);
    • Threat
      • S(J)
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XP(E)::B(B),XR(c)
      • P(i);OGATEB::QAB(F)
      • R(c);S_CUTB(a)::S(C)
      • R(c);N_PINP(E)::B(B)+P(E)
      • B(a);N_GUARD,N_PINP(E)::S(C)
      • B(a);N_GUARD::S(C),XB(a)
      • B(j);SBLOCK::S(J)
      • S(d);S_CUTR(c)::QAR1(F)
      • P(f);::S(J),XP(f)
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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).