MESON Chess Problem Database

Problem Display
PID: 103755 (4K3/1p1R1R1p/b7/1Q2N2B/1b2q2p/2PNk1P1/2r3p1/4B3 w - - 0 1)

Santiago, Joao Baptista

1/2 Prize, New York Post, 1946-1948

4K3/1p1R1R1p/b7/1Q2N2B/1b2q2p/2PNk1P1/2r3p1/4B3

#2

10 + 9

70 American Chess Problemist 1949
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Qxe5#
  • Tries
    • 1.Qc5+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Bxc5!
    • 1.Qb6+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Bc5!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sd1#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Rxf2
        • 2.Bxf2#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Qf3
        • 2.Rxf3#
      • 1...Qd5
        • 2.Seg4#
      • 1...Qf5
        • 2.Sc4#
      • 1...Qc6
        • 2.Seg4#
      • 1...Qg6
        • 2.Sc4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qd4
        • 2.Rf3#
      • 1...Qf4
        • 2.Rd3#
      • 1...Qg4
        • 2.Sexg4#
      • 1...Rc1
        • 2.Bd2#
      • 1...Rd2
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,OGATE,XS(F)::QAR2(E),XQ(e)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • Q(e);N_GUARD,N_PINS(F),P_SPINQ(e)::QAB1(E),XQ(e)
      • Refutation
        • B(d);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(e);N_GUARD,N_PINS(F),P_SPINQ(e)::QAB1(E),XQ(e)
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(e);CHECK,OGATE,XS(F)::QAR2(E),XQ(e)
      • R(a);OGATE,XS(C)::B(A),XR(a)
      • Q(e);N_GUARD,N_PINS(F)::R1(H),XQ(e)
      • Q(e);N_GUARD,N_PINS(F)::R1(I),XQ(e)
      • Q(e);N_PINS(F)::S(F)
      • Q(e);N_PINS(F),P_PINR(H)::S(F)
      • Q(e);N_PINS(F),P_PINR(I)::S(F)
      • Q(e);N_PINS(F)::S(F),XQ(e)
      • Q(e);N_GUARD,N_PINS(F)::R1(I)
      • Q(e);N_GUARD,N_PINS(F)::R1(H)
      • R(a);N_GUARD::B(A)
      • R(a);N_GUARD::B(A),XR(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).