MESON Chess Problem Database

Problem Display
PID: 187908 (1qr5/4B1Q1/3p4/pP2R3/pk2P2R/4P3/3b3K/1NN2B2 w - - 0 1)

Mendes de Moraes Filho, Feliciano

Hamburg Ty., 1910

1qr5/4B1Q1/3p4/pP2R3/pk2P2R/4P3/3b3K/1NN2B2

#2

11 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Rxb5#
  • Tries
    • 1.Bxd6+?
      • 1...Rc5
        • 2.Bxc5#
      • 1...Qxd6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qd4#
      • 1...dxc5+
        • 2.e5#
      • 1...d5+
        • 2.Rc7#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Qxb5
        • 2.Rxb5#
      • 1...Rxc5
        • 2.Qb2#
      • 1...Bxc1
        • 2.Qc3#
      • 1...Bxe3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(f);OGATE,XP(H)::R1(I),XQ(f)
  • Tries
    • Try
      • B(J);CHECK,XP(e)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::B(J),XR(g)
      • Refutation
        • Q(f);P_PINR(I),XB(J)
  • Actual
    • R(I);N_PINP(e)
    • Threat
      • QAR2(K)
    • Vars
      • P(e);CHECK,P_SPINP(e),XR(I)::R(G)+P(F)
      • P(e);CHECK,OGATEB::B(J)+R(I)
      • K(c);P_SPINP(e),S_FLIGHT,XR(I)::QAB1(K)
      • Q(f);OGATE,XP(H)::R1(I),XQ(f)
      • R(g);SBLOCK,XR(I)::QAR2(K)
      • B(a);N_GUARD,XS(B)::QAB1(K)
      • B(a);N_GUARD,XP(E)::QAB1(K)
      • B(a);N_GUARD::QAB1(K),XB(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).