MESON Chess Problem Database

Problem Display
PID: 139814 (2bR4/1p1p4/1N2p1R1/2rpkPp1/1N4P1/B4K2/3Q4/8 w - - 0 1)

Clayton, AT

The Problemist, 1937

2bR4/1p1p4/1N2p1R1/2rpkPp1/1N4P1/B4K2/3Q4/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qh2#
    • 1...exf5
      • 2.Re8#
      • 2.Qe3#
    • 1...d6
      • 2.Qe3#
  • Tries
    • 1.Sd3+?
      • 1...Kd4
        • 2.Bxc5#
      • 1...Kd6!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kd6!
  • Keys
    • 1.S4xd5!
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Kd6
        • 2.Rxe6#
      • 1...Rxd5
        • 2.Sc4#
        • 2.Qe3#
      • 1...exd5
        • 2.Re8#
        • 2.Qe3#
      • 1...exf5
        • 2.Re8#
        • 2.Qe3#
      • 1...Rc1
        • 2.Qe3#
      • 1...Rc2
        • 2.Qe3#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Ra5
        • 2.Sc4#
        • 2.Qc3#
        • 2.Qe3#
        • 2.Qb2#
      • 1...Rb5
        • 2.Sc4#
        • 2.Qc3#
        • 2.Qe3#
      • 1...Rc6
        • 2.Qe3#
      • 1...Rc7
        • 2.Qe3#
      • 1...d6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::QAB(A)
    • P(g);::QAR2(A)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT::B(B),XR(a)
      • Refutation
        • K(c);P_SPINP(e),P_SPINR(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT
  • Actual
    • S(D);XP(b)
    • Vars
      • R(a);CHECK,N_GUARD::QAB(A),XR(a)
      • K(c);P_SPINP(e),P_SPINR(a),S_FLIGHT::R1(H),XP(e)
      • R(a);::QAR2(A)
      • R(a);N_GUARD::S(G),XR(a)
      • P(g);::QAR2(A)
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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).