MESON Chess Problem Database

Problem Display
PID: 104006 (8/B1p5/p1N5/K3PP2/R1b1kP2/2p1P3/2N3R1/1Q6 w - - 0 1)

Andrade, Barry Jack da Costa

3rd Prize, Falkirk Herald, 1924

8/B1p5/p1N5/K3PP2/R1b1kP2/2p1P3/2N3R1/1Q6

#2

11 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Se1#
      • 2.S2b4#
    • 1...Kf3
      • 2.Se1#
    • 1...Kd5
      • 2.S2b4#
    • 1...Kxf5
      • 2.S2d4#
  • Tries
    • 1.Se1+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Se7#
      • 1...c2!
    • 1.Bc5?
      • 1...Kd3
        • 2.Se1#
        • 2.S2b4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kxf5
        • 2.S2d4#
      • 1...Kd5!
    • 1.Bb6?
      • 1...Kd3
        • 2.Se1#
        • 2.S2b4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.S2b4#
      • 1...Kxf5
        • 2.S2d4#
      • 1...cxb6+!
    • 1.Rf2?
      • 1...Kd3
        • 2.Se1#
        • 2.S2b4#
      • 1...Kd5
        • 2.S2b4#
        • 2.Qh1#
      • 1...Kxf5!
    • 1.Rg3?
      • 1...Kd5
        • 2.S2b4#
        • 2.Qh1#
      • 1...Kxf5
        • 2.S2d4#
      • 1...Kd3!
    • 1.Rb4?
      • 1...Kd3
        • 2.Se1#
      • 1...Kf3
        • 2.Se1#
      • 1...Kxf5
        • 2.S2d4#
      • 1...Kd5!
    • 1.Rxc4+?
      • 1...Kd3
        • 2.Rd4#
        • 2.Qf1#
      • 1...Kf3
        • 2.Se1#
        • 2.Qf1#
      • 1...Kxf5
        • 2.S2d4#
      • 1...Kd5!
    • 1.Qf1?
      • 1...Kd5
        • 2.Qxc4#
        • 2.Qf3#
      • 1...Kxf5!
    • 1.f6?
      • 1...Kd3
        • 2.Se1#
        • 2.S2b4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kf5
        • 2.S2d4#
      • 1...Kd5!
  • Keys
    • 1.Qb7!
      • 1...Kd3
        • 2.S6b4#
      • 1...Kf3
        • 2.S6d4#
      • 1...Kd5
        • 2.S6b4#
        • 2.Se7#
      • 1...Kxf5
        • 2.S6d4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINB(b),S_FLIGHT::S(B)
    • K(c);N_SPINB(b),S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • B(K);
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::S(B)
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT
    • Try
      • B(K);
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::S(B)
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
      • Refutation
        • P(e);CHECK,XB(K)
    • Try
      • R(C);
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)
    • Try
      • R(C);
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::QAB(A)+S(B),DCHECK
        • K(c);N_SPINB(b),S_FLIGHT::S(B)
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT
    • Try
      • R(E);CHECK,XB(b)
      • Vars
        • K(c);S_FLIGHT,XP(I)::QAB(A)+S(B),DCHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT,XP(I)
    • Try
      • P(I);
      • Vars
        • K(c);N_SPINB(b),S_FLIGHT::S(B)
        • K(c);N_SPINB(b),S_FLIGHT::QAB(A)+S(B),DCHECK
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);N_SPINB(b),S_FLIGHT::S(J)
      • K(c);N_SPINB(b),S_FLIGHT::QAB(A)+S(J),DCHECK
      • K(c);N_SPINB(b),S_FLIGHT,XP(I)::S(J)
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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).