MESON Chess Problem Database

Problem Display
PID: 155367 (Q5b1/6Bk/5K2/3R2p1/1pp2p2/1r6/1pq2p2/1B6 w - - 0 1)

Barnes, Barry Peter

Lipton, Michael

Comm., The Problemist, 2014

Q5b1/6Bk/5K2/3R2p1/1pp2p2/1r6/1pq2p2/1B6

#2

5 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
    • 1...Qf5+
      • 2.Bxf5#
    • 1...Qg6+
      • 2.Bxg6#
    • 1...Bxd5
      • 2.Qh8#
    • 1...Be6
      • 2.Qh8#
    • 1...Bf7
      • 2.Qh8#
    • 1...c3
      • 2.Bxc2#
    • 1...g4
      • 2.Rh5#
  • Tries
    • 1.Rxg5?
      • threat
        • 2.Rh5#
      • 1...Qf5+
        • 2.Bxf5#
      • 1...Qg6+
        • 2.Bxg6#
      • 1...Bf7
        • 2.Qh8#
      • 1...Rh3!
    • 1.Qe8?
      • threat
        • 2.Qh5#
      • 1...Qf5+
        • 2.Bxf5#
      • 1...Qg6+
        • 2.Bxg6#
        • 2.Qxg6#
      • 1...Bxd5
        • 2.Qh8#
      • 1...Be6
        • 2.Qh8#
      • 1...Bf7
        • 2.Qh8#
      • 1...Rh3!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qh1#
        • 2.Qe4#
      • 1...Qc3+
        • 2.Rxc3#
      • 1...Qxb1
        • 2.Qe4#
      • 1...Qxd3
        • 2.Qh1#
      • 1...Rxd3
        • 2.Qe4#
      • 1...f1Q
        • 2.Qe4#
      • 1...f1S
        • 2.Qe4#
      • 1...f1B
        • 2.Qe4#
      • 1...f1R
        • 2.Qe4#
      • 1...Qd1
        • 2.Rh3#
        • 2.Qe4#
      • 1...Qc1
        • 2.Rh3#
        • 2.Qe4#
      • 1...Qe2
        • 2.Rh3#
      • 1...Bd5
        • 2.Qh8#
      • 1...Be6
        • 2.Qh8#
      • 1...Bf7
        • 2.Qh8#
      • 1...f3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • Q(b);OGATE::B(A),XQ(b)
    • Q(b);CHECK,OGATE::B(A),XQ(b)
    • B(j);OGATE,XR(B)::QAR1(E)
    • B(j);OGATE::QAR1(E)
    • P(f);S_CUTR(d)::B(A),XQ(b)
    • P(h);OGATE::R(B)
  • Tries
    • Try
      • R(B);XP(h)
      • Threat
        • R(B)
      • Vars
        • Q(b);CHECK,OGATE::B(A),XQ(b)
        • B(j);OGATE::QAR1(E)
      • Refutation
        • R(d);
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • Q(b);CHECK,OGATE::B(A),XQ(b)
        • B(j);OGATE,XR(B)::QAR1(E)
        • B(j);OGATE::QAR1(E)
      • Refutation
        • R(d);
  • Actual
    • R(B);N_PINQ(b)
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);CHECK,OGATEB::B(A)+R(B),XQ(b)
      • Q(b);XB(A)::QAB(E)
      • Q(b);P_SPINQ(b),XR(B)::QAR(E)
      • R(d);XR(B)::QAB(E)
      • P(c);::QAB(E)
      • Q(b);::B(A)+R(B),DCHECK
      • B(j);OGATE::QAR1(E)
      • P(g);::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).