MESON Chess Problem Database

Problem Display
PID: 202937 (6BK/6N1/6kp/4Qb2/5rPb/8/8/2B5 w - - 0 1)

Rosner, Eugene David

The Problemist, 1983

6BK/6N1/6kp/4Qb2/5rPb/8/8/2B5

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Qxf5#
    • 1...Ra4
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Rb4
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Rc4
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Rd4
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Re4
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Rxg4
      • 2.Qxf5#
  • Tries
    • 1.Bf7+?
      • 1...Kg5
        • 2.Qxf5#
      • 1...Kxf7!
    • 1.Bh7+?
      • 1...Kg5
        • 2.Qxf5#
      • 1...Kf7!
    • 1.Qxf4?
      • threat
        • 2.Qxh6#
        • 2.Qxf5#
      • 1...Bxg4
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Bg5
        • 2.Qxf5#
      • 1...Bb1
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Bc2
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Bd3
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Be4
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Be6
        • 2.Bh7#
        • 2.Qxh6#
      • 1...Bd7
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...Bc8
        • 2.Bf7#
        • 2.Bh7#
        • 2.Qxh6#
        • 2.Qf7#
      • 1...h5
        • 2.Qh6#
        • 2.Qxf5#
      • 1...Kf6!
    • 1.gxf5+?
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Kg5!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Qg7#
      • 1...Bf6+
        • 2.Qxf6#
      • 1...Kg5
        • 2.Qxf5#
      • 1...Rxg4
        • 2.Qe8#
      • 1...Bxg4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_SPINB(c),P_SPINR(a)::QAR1(C),XB(c)
    • R(a);N_GUARD,XP(B)::QAB1(C),XB(c)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINB(c),P_SPINR(a)::QAR1(C),XB(c)
      • Refutation
        • K(d);S_FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINB(c),P_SPINR(a)::QAR1(C),XB(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB1(C),XB(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(c)
    • Try
      • P(B);CHECK,XB(c)
      • Vars
        • R(a);OGATE,XP(B)::QAB1(C),XR(a)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(a)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • B(b);CHECK,N_GUARD::QAR1(C),XB(b)
      • K(d);P-FLIGHT,P_SPINB(c),P_SPINR(a)::QAR1(C),XB(c)
      • R(a);XP(B)::QAB(C)
      • B(c);XP(B)::S(D),XR(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).