MESON Chess Problem Database

Problem Display
PID: 55486 (4r3/1p3Nb1/1K3R2/1pP2PB1/N3k3/2P5/Q1P2RP1/3n2q1 w - - 0 1)

Driver, John Edward

2nd Prize, Probleemblad, 1962

4r3/1p3Nb1/1K3R2/1pP2PB1/N3k3/2P5/Q1P2RP1/3n2q1

#2

12 + 7

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sd6#
    • 1...Re6+
      • 2.Qxe6#
    • 1...Ra8
      • 2.Qe6#
    • 1...Rb8
      • 2.Qe6#
    • 1...Rc8
      • 2.Qe6#
    • 1...Rd8
      • 2.Qe6#
    • 1...Rf8
      • 2.Qe6#
    • 1...Rg8
      • 2.Qe6#
    • 1...Rh8
      • 2.Qe6#
    • 1...Se3
      • 2.Rf4#
    • 1...bxa4
      • 2.Qc4#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Qd5#
      • 1...Re5
        • 2.Rd4#
      • 1...Se3
        • 2.Rf4#
      • 1...Sxc3!
    • 1.Re6+?
      • 1...Be5
        • 2.Sd6#
      • 1...Rxe6+!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qd5#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Re6+
        • 2.Qxe6#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Re5
        • 2.Sd6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Se3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(g);SBLOCK::S(L)
    • R(g);CHECK,N_GUARD::QAR2(A),XR(g)
    • R(g);N_GUARD::QAR2(A)
    • S(a);SBLOCK::R1(C)
    • P(d);N_GUARD,XS(F)::QAR2(A)
    • P(d);N_GUARD::QAR2(A)
  • Tries
    • Try
      • R(K);
      • Threat
        • QAB1(A)
      • Vars
        • R(g);S_CUTB(f)::R1(K)
        • S(a);SBLOCK::R1(C)
      • Refutation
        • S(a);XP(E)
    • Try
      • R(K);CHECK
      • Vars
        • B(f);P_SPINB(f)::S(L)
      • Refutation
        • R(g);CHECK,XR(K)
  • Actual
    • R(C);P_SPINP(G)
    • Threat
      • QAB1(A)
    • Vars
      • Q(b);CHECK,XP(G)::S(F),XQ(b)
      • R(g);CHECK,N_GUARD::QAR2(A),XR(g)
      • S(a);XP(E)::S(F),XS(a)
      • Q(b);N_GUARD::R1(C),XQ(b)
      • R(g);SBLOCK::S(L)
      • R(g);N_GUARD::QAR2(A)
      • S(a);N_PINP(G),S_CUTQ(b)::R1(C)
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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).