MESON Chess Problem Database

Problem Display
PID: 15385 (b2R4/8/1Q1NpPP1/2pkP1NR/8/4P3/4r2b/5BnK w - - 0 1)

Lender, Baruch

2nd Place, Israel Ring Ty., 1983

b2R4/8/1Q1NpPP1/2pkP1NR/8/4P3/4r2b/5BnK

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5+
      • 2.Sge4#
    • 1...Re1
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Ra2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rb2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rc2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rd2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rf2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rg2
      • 2.Sc4#
      • 2.Sdf7#
    • 1...Rxe3
      • 2.Sc4#
      • 2.Sdf7#
    • 1...c4
      • 2.Sdf7#
      • 2.Qb5#
  • Tries
    • 1.Sge4?
      • threat
        • 2.Sc3#
        • 2.Qxc5#
      • 1...Rxe3
        • 2.Qxc5#
      • 1...c4
        • 2.Sc3#
        • 2.Qc5#
        • 2.Qb5#
      • 1...Rc2!
    • 1.Sde4+?
      • 1...Kxe5
        • 2.Qxe6#
      • 1...Kc4!
    • 1.Sb7+?
      • 1...Kxe5
        • 2.Qxe6#
      • 1...Kc4!
    • 1.Qb3+?
      • 1...Kxe5+
        • 2.Sge4#
      • 1...c4
        • 2.Qb5#
      • 1...Kc6!
    • 1.Qa6?
      • threat
        • 2.Sc4#
        • 2.Sdf7#
      • 1...Kxe5+
        • 2.Sge4#
      • 1...Bxe5
        • 2.Qxa8#
      • 1...c4
        • 2.Qb5#
      • 1...Bc6!
    • 1.Qb7+?
      • 1...Kxe5
        • 2.Sge4#
        • 2.Sh7#
      • 1...Bxb7!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sc7#
      • 1...Kxe6+
        • 2.Sb7#
      • 1...Rxe3
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);CHECK,P-FLIGHT,XP(D)::R(F)+S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(C)::QAR1(G),XP(d)
      • Refutation
        • R(b);
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_PINS(H),XP(D)::QAR1(G),XP(f)
      • Refutation
        • K(e);P_PINS(H),P_SPINR(b),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_PINS(H),XP(D)::QAR1(G),XP(f)
      • Refutation
        • K(e);P_PINS(H),P_SPINR(b),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT,XP(D)::R(F)+S(E)
        • P(d);OGATEB,P_SPINP(d)::QAR2(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,P-FLIGHT,XP(D)::R(F)+S(E)
        • B(c);SBLOCK,XP(D)::QAB(G),XB(g)
        • P(d);OGATEB::QAR2(G)
      • Refutation
        • B(g);
    • Try
      • Q(G);CHECK
      • Refutation
        • B(g);XQ(G)
  • Actual
    • S(E);XP(f)
    • Threat
      • S(E)
    • Vars
      • K(e);CHECK,S_FLIGHT,XS(E)::QAR(G)+S(H)
      • R(b);OGATE,XP(C)::B(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).