MESON Chess Problem Database

Problem Display
PID: 90605 (b1B3n1/1Q1Rb2q/2r4p/6P1/r3kNP1/4pNK1/1n2P3/8 w - - 0 1)

Bilfinger, Carl

Die Schwalbe, 1968

b1B3n1/1Q1Rb2q/2r4p/6P1/r3kNP1/4pNK1/1n2P3/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rd4#
    • 1...Ra2
      • 2.Rd4#
    • 1...Ra3
      • 2.Rd4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Ra5
      • 2.Rd4#
    • 1...Ra6
      • 2.Rd4#
    • 1...Ra7
      • 2.Rd4#
    • 1...Bb4
      • 2.Rd4#
    • 1...Sd3
      • 2.exd3#
    • 1...Sc4
      • 2.Rd4#
      • 2.Qb1#
  • Tries
    • 1.Sd2+?
      • 1...Ke5
        • 2.Rd5#
      • 1...exd2!
    • 1.Rxe7+?
      • 1...Qxe7
        • 2.Bf5#
      • 1...Sxe7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Re5#
      • 1...Qf5
        • 2.Bxf5#
      • 1...Qg7
        • 2.Bf5#
      • 1...Qh8
        • 2.Bf5#
      • 1...Ra5
        • 2.Rd4#
      • 1...Bd6
        • 2.Qxh7#
      • 1...Bf6
        • 2.Qxh7#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc4
        • 2.Rd4#
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::R1(H)
    • R(c);N_GUARD::R1(H),XR(c)
    • B(g);S_CUTR(c)::R1(H)
    • S(a);OGATE::P(A),XS(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);N_SPINR(e),P-FLIGHT::R1(H)
      • Refutation
        • P(b);XS(B)
    • Try
      • R(H);CHECK,XB(g)
      • Vars
        • Q(h);XR(H)::B(I)
      • Refutation
        • S(j);XR(H)
  • Actual
    • R(H);N_PINR(e)
    • Threat
      • R1(H)
    • Vars
      • Q(h);N_GUARD::B(I),XQ(h)
      • Q(h);N_GUARD::B(I)
      • R(c);N_GUARD::R1(H)
      • B(g);OGATE,P_PINS(D)::QAB(G),XQ(h)
      • B(g);OGATE::QAB(G),XQ(h)
      • S(a);OGATE::P(A),XS(a)
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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).