MESON Chess Problem Database

Problem Display
PID: 16364 (5nr1/1R6/pB5b/pk3r2/NP3p2/3N4/2QK4/7b w - - 0 1)

Sachsel, Robert

Chess, 1940

5nr1/1R6/pB5b/pk3r2/NP3p2/3N4/2QK4/7b

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Bg1#
      • 2.Bf2#
      • 2.Be3#
      • 2.Bd4#
      • 2.Bxa5#
      • 2.Ba7#
      • 2.Bc7#
      • 2.Bd8#
    • 1...Rg2+
      • 2.Bf2#
    • 1...f3+
      • 2.Be3#
  • Tries
    • 1.Sab2?
      • threat
        • 2.Qa4#
        • 2.Qc4#
      • 1...Rg2+
        • 2.Bf2#
      • 1...f3+
        • 2.Be3#
      • 1...Rc5
        • 2.Qa4#
        • 2.Qxc5#
      • 1...Bd5
        • 2.Qa4#
        • 2.Qc5#
      • 1...a4
        • 2.Qxa4#
        • 2.Qc4#
      • 1...Bxb7!
    • 1.Sc3+?
      • 1...Kc4
        • 2.Qa2#
      • 1...Kc6!
  • Keys
    • 1.Sdb2!
      • threat
        • 2.Qc4#
      • 1...Rd5+
        • 2.Bd4#
      • 1...Rg2+
        • 2.Bf2#
      • 1...f3+
        • 2.Be3#
      • 1...Kxb4
        • 2.Bc5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Bd5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(i);CHECK,S_CUTB(a)::R(G)+B(F)
    • P(b);CHECK,S_CUTB(a)::R(G)+B(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(i);CHECK,S_CUTB(a)::R(G)+B(F)
        • P(b);CHECK,S_CUTB(a)::R(G)+B(F)
      • Refutation
        • B(a);XR(G)
    • Try
      • S(D);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(e);CHECK,S_CUTB(a)::R(G)+B(F)
      • R(i);CHECK,S_CUTB(a)::R(G)+B(F)
      • P(b);CHECK,S_CUTB(a)::R(G)+B(F)
      • K(d);P-FLIGHT,XP(E)::R(G)+B(F),DCHECK
      • R(e);N_GUARD::QAR1(A),XR(e)
      • B(a);S_CUTR(e)::QAR1(A)
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).