MESON Chess Problem Database

Problem Display
PID: 274231 (3n4/1r2p2B/2rb1R2/N1ppk2N/8/2qn4/3R1P1K/1b4Q1 w - - 0 1)

Baxter, FL

Probleemblad, 1953

3n4/1r2p2B/2rb1R2/N1ppk2N/8/2qn4/3R1P1K/1b4Q1

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.f4#
    • 1...Qd4
      • 2.Qg5#
    • 1...Sc1
      • 2.f4#
    • 1...Se1
      • 2.f4#
    • 1...Sb2
      • 2.f4#
    • 1...Sb4
      • 2.f4#
    • 1...Se6
      • 2.Sxc6#
    • 1...Sf7
      • 2.Sxc6#
    • 1...d4
      • 2.Qg5#
  • Tries
    • 1.Re6+?
      • 1...Kd4+
        • 2.f4#
      • 1...Sxe6
        • 2.Sxc6#
      • 1...Kxe6+!
    • 1.Qe1+?
      • 1...Sxe1
        • 2.f4#
      • 1...Kd4+!
    • 1.Qg3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Kd4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rh6#
      • 1...Kd4+
        • 2.Rf4#
      • 1...exf6
        • 2.Qxf6#
      • 1...Bc7
        • 2.Rxc6#
      • 1...Bb8
        • 2.Rxc6#
      • 1...Se6
        • 2.Sxc6#
      • 1...d4
        • 2.Qg5#
      • 1...e6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(f);CHECK,P_SPINS(c),S_FLIGHT::QAB(A)+P(C)
    • Q(b);SBLOCK::QAR2(A)
    • S(c);N_GUARD::P(C)
    • S(k);N_GUARD::S(E),XR(g)
    • P(e);SBLOCK::QAR2(A)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(f);CHECK,N_GUARD,P_SPINS(c),S_FLIGHT::QAB(A)+P(C)
        • S(k);SBLOCK,XR(G)::S(E),XR(g)
      • Refutation
        • K(f);CHECK,P-FLIGHT,XR(G)
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);XQ(A)::P(C)
      • Refutation
        • K(f);CHECK,P_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • K(f);P_PINQ(A),P_SPINS(c),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(G)
    • Vars
      • K(f);CHECK,N_GUARD,P_SPINS(c),S_FLIGHT::QAB(A)+R(G),DCHECK
      • P(j);OGATE,P_SPINP(j),XR(G)::QAB1(A),XP(j)
      • B(h);OGATE::QAB(A)+R(G),XR(g)
      • S(k);N_GUARD::S(E),XR(g)
      • P(e);SBLOCK::QAR2(A)
      • P(j);SBLOCK::QAB(A)+R(G)
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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).