MESON Chess Problem Database

Problem Display
PID: 256 (2nr2b1/n7/Q7/2k1P3/Pp4R1/1BNP3K/2r3P1/b3B3 w - - 0 1)

Valve, Leo Erland

Suomen Shakki, 1950

2nr2b1/n7/Q7/2k1P3/Pp4R1/1BNP3K/2r3P1/b3B3

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Rc4#
    • 1...Re8
      • 2.d4#
    • 1...Rf8
      • 2.d4#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Bd5
      • 2.d4#
    • 1...Bh7
      • 2.Rc4#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sc6
      • 2.Qb5#
    • 1...Sd6
      • 2.d4#
  • Tries
    • 1.Bf2+?
      • 1...Rd4
        • 2.Se4#
        • 2.Bxd4#
      • 1...Rxf2!
    • 1.Qa5+?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Kc6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Bxb4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Rd2
        • 2.Qc4#
      • 1...Rc3
        • 2.Bf2#
      • 1...Bc3
        • 2.Qc4#
      • 1...Sc6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(g);S_CUTB(h)::R1(H)
    • R(g);N_GUARD::P(E)
    • B(h);N_GUARD::R1(H),XB(h)
    • B(h);S_CUTR(g)::P(E)
    • B(h);N_GUARD::R1(H)
    • S(e);N_GUARD::QAR1(J),XS(e)
    • S(e);N_GUARD::QAR1(J)
    • S(f);S_CUTR(g)::P(E)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • R(b);XB(A)
    • Try
      • Q(J);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(J),XS(e)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • B(A),XP(c)
    • Vars
      • R(b);N_GUARD::QAR1(J),XR(b)
      • S(f);N_GUARD::QAB1(J),XS(f)
      • R(b);N_GUARD::QAR1(J)
      • R(b);N_GUARD,P_PINP(E),S_CUTB(a)::B(A)
      • B(a);S_CUTR(b)::QAR1(J)
      • S(e);N_GUARD::QAR1(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).