MESON Chess Problem Database

Problem Display
PID: 45495 (5Q1N/4B1P1/4r1p1/2p1kP1N/4qpb1/2P2p2/4n2K/1B1RR3 w - - 0 1)

Matthews, WG

Recomm., BCF 051. Ty., 1945-1946

5Q1N/4B1P1/4r1p1/2p1kP1N/4qpb1/2P2p2/4n2K/1B1RR3

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sf7#
    • 1...Qc6
      • 2.Sf7#
    • 1...Qb7
      • 2.Sf7#
    • 1...Qa8
      • 2.Sf7#
    • 1...Qe3
      • 2.Sf7#
    • 1...Qa4
      • 2.Sf7#
    • 1...Qb4
      • 2.Sf7#
    • 1...Qc4
      • 2.Sf7#
    • 1...Rd6
      • 2.Bxd6#
    • 1...Rf6
      • 2.Qxf6#
    • 1...Rxe7
      • 2.Sxg6#
      • 2.Qf6#
    • 1...Bxf5
      • 2.Sf7#
    • 1...Sc1
      • 2.Rxe4#
    • 1...Sg1
      • 2.Rxe4#
    • 1...gxf5
      • 2.Sf7#
  • Tries
    • 1.Bf6+?
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Kxf5!
    • 1.Rd5+?
      • 1...Qxd5
        • 2.Sf7#
      • 1...Kxd5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Rd5#
      • 1...Qxf5
        • 2.Qxc5#
      • 1...Rxe7
        • 2.Sxg6#
      • 1...Bxf5
        • 2.Sf7#
      • 1...gxf5
        • 2.Sf7#
      • 1...Sd4
        • 2.Qxc5#
      • 1...Qd5
        • 2.Sf7#
      • 1...Qc6
        • 2.Sf7#
      • 1...Qc4
        • 2.Sf7#
      • 1...Ra6
        • 2.Sf7#
      • 1...Rb6
        • 2.Sf7#
      • 1...Rc6
        • 2.Sf7#
      • 1...Rd6
        • 2.Sf7#
        • 2.Bxd6#
      • 1...Rf6
        • 2.Bxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(c);P_SPINS(a)::S(K)
    • Q(c);::S(K)
    • R(h);N_GUARD::B(H),XR(h)
    • R(h);N_GUARD::QAB1(J),XR(h)
    • B(e);SBLOCK,XP(F)::S(K)
    • S(a);OGATE,P_SPINQ(c)::R1(C),XQ(c)
    • P(i);SBLOCK,XP(F)::S(K)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • R(h);OGATE,XB(H)::QAB1(J),XR(h)
      • Refutation
        • K(g);P-FLIGHT,P_SPINQ(c),XP(F)
    • Try
      • R(B);CHECK
      • Vars
        • Q(c);P_SPINS(a),SBLOCK,XR(B)::S(K)
      • Refutation
        • K(g);P-FLIGHT,XR(B)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J),XR(h)
    • Vars
      • K(g);P-FLIGHT,P_SPINQ(c),P_SPINR(h),XP(F)::R(B)
      • Q(c);N_GUARD,P_SPINS(a),XP(F)::QAR2(J),XP(f)
      • R(h);N_GUARD,XB(H)::S(K),XP(i)
      • B(e);SBLOCK,XP(F)::S(K)
      • P(i);SBLOCK,XP(F)::S(K)
      • S(a);P_SPINQ(c)::QAR2(J),XP(f)
      • Q(c);P_SPINS(a)::S(K)
      • R(h);::S(K)
      • R(h);N_GUARD::B(H),XR(h)
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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).