MESON Chess Problem Database

Problem Display
PID: 226517 (3N4/2p2q2/4r1R1/1N1k1r1R/1P6/1KB2Pp1/1n4B1/2Q3bn w - - 0 1)

Gonzales, Manuel

US Problem Bulletin, 1981

3N4/2p2q2/4r1R1/1N1k1r1R/1P6/1KB2Pp1/1n4B1/2Q3bn

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rfe5
      • 2.f4#
    • 1...Re4
      • 2.fxe4#
    • 1...Ra6
      • 2.f4#
    • 1...Rb6
      • 2.f4#
    • 1...Rc6
      • 2.f4#
    • 1...Rd6
      • 2.f4#
    • 1...Rf6
      • 2.f4#
    • 1...Rxg6
      • 2.f4#
  • Tries
    • 1.Rxf5+?
      • 1...Re5
        • 2.Rxe5#
        • 2.f4#
      • 1...Qxf5!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sd3!
  • Keys
    • 1.Be5!
      • threat
        • 2.f4#
      • 1...Rxf3+
        • 2.Sc3#
      • 1...Kxe5
        • 2.f4#
      • 1...Rexe5
        • 2.Qc6#
      • 1...Rf4
        • 2.Sc3#
      • 1...Sf2
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(f);S_CUTR(g)::B(B)+P(E)
    • R(g);OGATE::P(E),XR(g)
    • R(g);N_GUARD::B(B)+P(E)
    • R(g);N_GUARD,XR(I)::B(B)+P(E)
  • Tries
    • Try
      • R(H);CHECK,XR(f)
      • Refutation
        • Q(i);XR(H)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • B(D);N_PINR(f)
    • Threat
      • B(B)+P(E)
    • Vars
      • R(f);CHECK,P_SPINR(f),XP(E)::S(G)
      • K(e);P-FLIGHT,P_SPINR(f),XB(D)::P(E)
      • R(g);N_GUARD,SBLOCK,XB(D)::QAB1(A)
      • R(f);::S(G)
      • S(b);S_CUTB(a)::QAR1(A)
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).