MESON Chess Problem Database

Problem Display
PID: 6272 (5BQ1/1N6/5p2/p2R1rp1/r1k5/np6/1K2N2p/5B1q w - - 0 1)

Mansfield, Comins

HM., Evening Standard, 1928

5BQ1/1N6/5p2/p2R1rp1/r1k5/np6/1K2N2p/5B1q

#2

7 + 10

3202 Complete Mansfield/I 1996
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sxa5#
      • 2.Sd6#
    • 1...Sb5
      • 2.Rd4#
  • Tries
    • 1.Rd1+?
      • 1...Qd5
        • 2.Sf4#
      • 1...Rd5
        • 2.Sg1#
      • 1...Kb5!
    • 1.Rd2+?
      • 1...Qd5
        • 2.Sf4#
      • 1...Rd5
        • 2.Sg1#
      • 1...Kb5!
    • 1.Rc5+?
      • 1...Kb4
        • 2.Re5#
        • 2.Rxf5#
        • 2.Qxb3#
      • 1...Kd3!
    • 1.Re5+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Rxf5+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Kd3!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Sd6#
      • 1...Kb5
        • 2.Sd4#
      • 1...Qxd5
        • 2.Sf4#
      • 1...Rxd5
        • 2.Sg1#
      • 1...Sb5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::QAB(G)+R(D),DCHECK
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::B(A)+S(C)
        • R(h);P_SPINR(h)::B(A)+S(C)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::B(A)+S(C)
        • R(h);P_SPINR(h)::B(A)+S(C)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(G),XQ(a)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(D);CHECK,XR(h)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(G),XQ(a)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • B(F);
    • Threat
      • S(E)
    • Vars
      • K(f);S_FLIGHT::B(A)+S(C),DCHECK
      • Q(a);N_GUARD,P_SPINQ(a),XR(D)::B(A)+S(C)
      • R(h);N_GUARD,P_SPINR(h),XR(D)::B(A)+S(C)
      • S(c);SBLOCK::QAB(G)+R(D),DCHECK
HTML5 logo

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).