MESON Chess Problem Database

Problem Display
PID: 134159 (2krb3/3r1p2/PQ1p1B2/3N4/8/8/2B5/1K6 w - - 0 1)

Hirschenson, Aaron

StrateGems, 2009

2krb3/3r1p2/PQ1p1B2/3N4/8/8/2B5/1K6

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxd8#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Rc7
      • 2.Qxc7#
  • Tries
    • 1.Ka1?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxd8#
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Kc1?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxd8#
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Ka2?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxd8#
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Kb2?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Bd1?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Bb3?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxd8#
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Bd3?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Be4?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Bh7?
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7!
    • 1.Qa7?
      • threat
        • 2.Sb6#
        • 2.Qa8#
      • 1...Rb7+
        • 2.Qxb7#
      • 1...Rc7
        • 2.Sb6#
        • 2.Qxc7#
      • 1...Re7
        • 2.Sb6#
        • 2.Sxe7#
      • 1...Rxa7!
    • 1.Qc6+?
      • 1...Rc7
        • 2.Qxc7#
      • 1...Kb8!
  • Keys
    • 1.Ba4!
      • 1...Rb7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Qxd8#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Re7
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::QAR1(E),XR(e)
    • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
    • R(b);N_GUARD::QAR1(E),XR(b)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • R(b);N_GUARD,P_PINP(D)::QAR1(E),XR(e)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINB(B)::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • R(b);N_GUARD,P_PINP(D)::QAR1(E),XR(e)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(e)
        • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
      • Refutation
        • R(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,N_GUARD::QAB1(E),XR(b)
      • Refutation
        • R(b);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(E),XR(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • R(b);N_GUARD,P_PINQ(E)::QAB1(E),XR(b)
      • R(b);N_GUARD::QAR1(E),XR(e)
      • R(b);N_GUARD::QAR1(E),XR(b)
      • R(b);N_GUARD::S(C),XR(b)
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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).