MESON Chess Problem Database

Problem Display
PID: 166487 (3q4/2p5/B2b4/1n2pN2/1P1B1p1P/R6p/Q1N3kp/R3K2b w Q - 0 1)

Ouellet, Charles

The Problemist, 2017

3q4/2p5/B2b4/1n2pN2/1P1B1p1P/R6p/Q1N3kp/R3K2b

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh4+
      • 2.Sxh4#
    • 1...Qg8
      • 2.Qxg8#
    • 1...Bxb4+
      • 2.Sxb4#
    • 1...Sa7
      • 2.Bf1#
  • Tries
    • 1.Sce3+?
      • 1...Kg1
        • 2.Ke2#
        • 2.Qf2#
        • 2.0-0-0#
      • 1...Kf3!
    • 1.Bxb5?
      • threat
        • 2.Bf1#
      • 1...Qxh4+
        • 2.Sxh4#
      • 1...Bxb4+
        • 2.Sxb4#
      • 1...exd4!
    • 1.Qc4?
      • threat
        • 2.Qf1#
        • 2.Qe2#
      • 1...Qxh4+
        • 2.Sxh4#
      • 1...Sxd4
        • 2.Qf1#
      • 1...exd4
        • 2.Qf1#
      • 1...Sc3
        • 2.Qf1#
      • 1...f3
        • 2.Qf1#
      • 1...Bxb4+!
    • 1.Qd5+?
      • 1...f3
        • 2.Qxf3#
      • 1...e4!
    • 1.Qg8+?
      • 1...Qg5
        • 2.Qxg5#
      • 1...Qxg8!
  • Keys
    • 1.0-0-0!
      • threat
        • 2.Sa1#
      • 1...Qxh4
        • 2.Sxh4#
      • 1...Bxb4
        • 2.Sxb4#
      • 1...Sxa3
        • 2.Se1#
      • 1...Sxd4
        • 2.Scxd4#
      • 1...Sc3
        • 2.Se1#
      • 1...Qg8
        • 2.Qxg8#
      • 1...f3
        • 2.Sce3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(j);CHECK,XP(H)::S(I),XQ(j)
    • Q(j);N_GUARD::QAR(C),XQ(j)
    • B(h);CHECK,XP(F)::QAR(C)+S(D),XB(h)
    • S(f);OGATE::B(J)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(J);XS(f)
      • Threat
        • B(J)
      • Vars
        • Q(j);CHECK,XP(H)::S(I),XQ(j)
        • B(h);CHECK,XP(F)::QAR(C)+S(D),XB(h)
      • Refutation
        • P(g);XB(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);CHECK,XP(H)::S(I),XQ(j)
        • S(f);XB(G)::QAB1(C)
        • P(g);XB(G)::QAB1(C)
        • S(f);::QAB1(C)
        • P(e);::QAB1(C)
      • Refutation
        • B(h);CHECK,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(C),XP(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::QAR(C),XQ(j)
      • Refutation
        • Q(j);XQ(C)
  • Actual
    • K(B);0-0-0
    • Threat
      • QAR(C)+S(D)
    • Vars
      • Q(j);XP(H)::S(I),XQ(j)
      • B(h);XP(F)::QAR(C)+S(D),XB(h)
      • S(f);XR(E)::QAR(C)+S(D),DCHECK
      • S(f);XB(G)::QAR(C)+S(D),XS(f)
      • S(f);::QAR(C)+S(D),DCHECK
      • Q(j);N_GUARD::QAR(C),XQ(j)
      • P(e);SBLOCK::QAR(C)+S(D),DCHECK
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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).