MESON Chess Problem Database

Problem Display
PID: 109428 (4nKB1/r1p5/pP3p2/B2R4/p1k3rQ/4R2b/1ppP4/1n6 w - - 0 1)

Stahl, August

Krusta-mikla, 1938

4nKB1/r1p5/pP3p2/B2R4/p1k3rQ/4R2b/1ppP4/1n6

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rf5#
      • 2.Qxd4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Bf1
      • 2.Qxg4#
    • 1...Sxd2
      • 2.Rc3#
    • 1...Sa3
      • 2.Rc3#
    • 1...Sc3
      • 2.Rxc3#
  • Tries
    • 1.Re4+?
      • 1...Kb3
        • 2.Rd3#
      • 1...Rxe4!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Rc4#
      • 1...Kxc5!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Rb4#
      • 1...Kxb3
        • 2.Rd3#
      • 1...Sxd2
        • 2.Rc3#
      • 1...axb3
        • 2.d3#
      • 1...Rd4
        • 2.Rf5#
      • 1...c5
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(g);OGATE::QAR2(C),XR(g)
    • R(g);OGATE::QAR(C),XR(g)
    • B(d);N_GUARD::QAR(C),XR(g)
    • S(a);N_GUARD,XP(A)::R1(B)
    • S(a);N_GUARD::R1(B)
    • S(a);N_GUARD::R1(B),XS(a)
  • Tries
    • Try
      • R(B);CHECK,N_PINR(g)
      • Vars
        • K(f);S_FLIGHT::B(H)+R(E),DCHECK
      • Refutation
        • R(g);P_SPINR(g),XR(B)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT::R1(E)
      • Refutation
        • K(f);N_SPINR(g),P-FLIGHT,XR(E)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • K(f);N_SPINR(g),S_FLIGHT,XR(B)::B(H)+R(E),DCHECK
      • S(a);N_GUARD,XP(A)::R1(B)
      • P(e);SBLOCK,XR(B)::P(A)
      • R(g);::B(H)+R(E)
      • P(k);SBLOCK::B(H)+R(E)
HTML5 logo

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).