MESON Chess Problem Database

Problem Display
PID: 169435 (4R3/4N1p1/b1pK4/5P2/R1r1kN2/2p1r1P1/8/3Q4 w - - 0 1)

Hawes, Frederick Thomas

The Leader, 1921

4R3/4N1p1/b1pK4/5P2/R1r1kN2/2p1r1P1/8/3Q4

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qd3#
    • 1...Re2
      • 2.Qd3#
    • 1...Rd3+
      • 2.Qxd3#
    • 1...Rd4+
      • 2.Rxd4#
    • 1...Bb7
      • 2.Rxc4#
    • 1...Bc8
      • 2.Rxc4#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Qc2+?
      • 1...Kd4
        • 2.Sxc6#
      • 1...Rd3+
        • 2.Qxd3#
      • 1...Kf3!
    • 1.Qh1+?
      • 1...Kd4
        • 2.Sxc6#
      • 1...Rf3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sxc6#
      • 1...Rd3+
        • 2.Sfd5#
      • 1...Rd4+
        • 2.Sed5#
      • 1...Kd4
        • 2.Sxc6#
      • 1...Bc8
        • 2.Rxc4#
      • 1...c5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::QAB1(A)
    • R(b);CHECK,N_GUARD::QAB1(A),XR(b)
    • R(c);CHECK,OGATE::R1(C),XR(c)
    • B(e);N_GUARD::R(C),XR(c)
    • P(f);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::S(G),XP(f)
        • R(b);CHECK,N_GUARD,N_SPINR(c),P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • K(d);N_SPINR(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::S(G),XP(f)
      • Refutation
        • R(b);N_SPINR(c),P_SPINR(b)
  • Actual
    • Q(A);
    • Threat
      • R(H)+S(G),XP(f)
    • Vars
      • R(b);CHECK,SBLOCK::QAR(A)+S(D)
      • R(c);CHECK::R(H)+S(G)
      • K(d);P-FLIGHT::S(G),XP(f)
      • B(e);N_GUARD::R(C),XR(c)
      • P(f);::R(H)+S(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).