MESON Chess Problem Database

Problem Display
PID: 51748 (2NnRB2/b2P2p1/Q3np2/2Pk1Bp1/3p2N1/p2p4/5K2/8 w - - 0 1)

Casa, Alex

The Problemist Supplement, 2004

2NnRB2/b2P2p1/Q3np2/2Pk1Bp1/3p2N1/p2p4/5K2/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Be4#
    • 1...Sxc5
      • 2.Se7#
    • 1...Sc7
      • 2.Be4#
    • 1...Sb7
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qxe6#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Be4#
      • 1...Sxc5
        • 2.Se7#
      • 1...Sxf8!
    • 1.Se3+?
      • 1...Ke5
        • 2.Bd6#
        • 2.Qd6#
      • 1...dxe3+!
    • 1.Bxe6+?
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Ke4!
    • 1.Rxe6?
      • threat
        • 2.Be4#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Sc6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Se7#
      • 1...Bxc5
        • 2.Sb6#
      • 1...Sxc5
        • 2.Be4#
      • 1...Sc6
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(f);::B(D)
    • S(f);SBLOCK,XP(C)::S(G)
    • S(j);N_GUARD::QAB1(E),XS(f)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • B(D)
      • Vars
        • S(f);SBLOCK,XP(C)::S(G)
      • Refutation
        • S(f);XB(I)
    • Try
      • S(B);CHECK
      • Refutation
        • P(c);CHECK,XS(B)
    • Try
      • B(D);CHECK,XS(f)
      • Vars
        • S(j);OGATE,XB(D)::QAB1(E),XS(j)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(H);XS(f)
      • Threat
        • B(D)
      • Vars
        • S(j);OGATE,XR(H)::QAB1(E),XS(j)
        • B(h);N_GUARD::S(G),XB(h)
      • Refutation
        • S(j);
  • Actual
    • Q(E);
    • Threat
      • S(G)
    • Vars
      • B(h);N_GUARD,P_SPINB(h),XP(C)::S(G)
      • S(f);P_SPINS(f),XP(C)::B(D)
      • S(j);SBLOCK::QAB(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).