MESON Chess Problem Database

Problem Display
PID: 164103 (N3R2K/3k4/2p3B1/ppB1pp2/q2bQ3/4nN2/b2n4/3R4 w - - 0 1)

Aleksandrov, Vladimir Aleksandrovich

Best Problems, 2015

N3R2K/3k4/2p3B1/ppB1pp2/q2bQ3/4nN2/b2n4/3R4

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sxe5#
    • 1...Sdf1
      • 2.Sxe5#
    • 1...Sb3
      • 2.Sxe5#
    • 1...Sxe4
      • 2.Sxe5#
    • 1...Sc4
      • 2.Qxf5#
    • 1...Sd5
      • 2.Qxf5#
  • Tries
    • 1.Rd8+?
      • 1...Ke6
        • 2.Qxc6#
      • 1...Kxd8!
    • 1.Qxf5+?
      • 1...Be6
        • 2.Qxe6#
      • 1...Sxf5!
    • 1.Qxd4+?
      • 1...Bd5
        • 2.Sxe5#
      • 1...Sd5
        • 2.Sxe5#
      • 1...exd4
        • 2.Se5#
      • 1...Qxd4!
    • 1.Qh4?
      • threat
        • 2.Qe7#
        • 2.Qd8#
      • 1...Bxc5
        • 2.Qd8#
      • 1...Sd5
        • 2.Qd8#
      • 1...e4+!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Sb6#
      • 1...Bxe5+
        • 2.Sxe5#
      • 1...Bxc5
        • 2.Qc7#
      • 1...Sdc4
        • 2.Qg7#
      • 1...Sec4
        • 2.Bxf5#
      • 1...Sd5
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(b);P_SPINB(e)::S(B),XP(h)
    • S(b);P_SPINB(e),XQ(C)::S(B),XP(h)
    • S(c);N_GUARD,S_CUTB(a)::QAB(C),XP(i)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(k);P_SPINP(h),S_FLIGHT::QAR2(C),XP(j)
      • Refutation
        • K(k);P-FLIGHT,XR(G)
    • Try
      • Q(C);CHECK,XP(i)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(C),XB(a)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);CHECK,XB(e)
      • Vars
        • B(a);P_SPINB(a)::S(B),XP(h)
        • S(c);P_SPINS(c)::S(B),XP(h)
        • P(h);XQ(C)::S(B)
      • Refutation
        • Q(d);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);P_SPINS(b),XB(D)::QAR1(C)
        • S(c);::QAR1(C)
      • Refutation
        • P(h);CHECK
  • Actual
    • Q(C);P_SPINQ(C),XP(h)
    • Threat
      • S(F)
    • Vars
      • B(e);CHECK,P_SPINS(b),XQ(C)::S(B),XB(e)
      • B(e);N_PINQ(C),P_SPINS(b),XB(D)::QAR1(C)
      • S(b);P_SPINB(e),S_CUTB(a)::QAR(C)
      • S(c);N_GUARD,S_CUTB(a)::B(E),XP(i)
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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).