MESON Chess Problem Database

Problem Display
PID: 145738 (1n4q1/1R2p3/1Nk2r1Q/K1NRb2r/1B6/8/6Bp/8 w - - 0 1)

Monteiro da Silveiro, D

1st Prize, Rivista Portuguesa de Xadrez TT, 1940

1n4q1/1R2p3/1Nk2r1Q/K1NRb2r/1B6/8/6Bp/8

#2

8 + 8

14868 Pirnie Collection 2012
56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rdd7#
      • 2.Rd8#
    • 1...Qd8
      • 2.Rdd7#
      • 2.Rxd8#
    • 1...Qe8
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rdd7#
      • 2.Rd8#
    • 1...Qf8
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rdd7#
      • 2.Rd8#
    • 1...Qh8
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rdd7#
      • 2.Rd8#
    • 1...Rd6
      • 2.Rxd6#
  • Tries
    • 1.Rdd7+?
      • 1...Qd5
        • 2.Bxd5#
      • 1...Qxg2!
    • 1.Rd8+?
      • 1...Qd5
        • 2.Bxd5#
      • 1...Qxg2!
  • Keys
    • 1.Se6!
      • threat
        • 2.Rd6#
      • 1...Kxb7
        • 2.Rd7#
      • 1...Qxg2
        • 2.Sd8#
      • 1...Ba1
        • 2.Rc7#
      • 1...Rf3
        • 2.Sd8#
      • 1...Bb2
        • 2.Rc7#
      • 1...Bc3
        • 2.Rc7#
      • 1...Bg3
        • 2.Rf5#
      • 1...Bd4
        • 2.Rc7#
      • 1...Bf4
        • 2.Rg5#
      • 1...Bd6
        • 2.Rc5#
      • 1...Bc7
        • 2.Rxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • R(e);::B(A)+R(E),DCHECK,XR(e)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • Q(h);N_GUARD,P_PINS(D),P_SPINQ(h)::B(A),XQ(h)
      • Refutation
        • Q(h);XB(A)
    • Try
      • R(E);CHECK
      • Vars
        • Q(h);N_GUARD,P_PINS(D),P_SPINQ(h)::B(A),XQ(h)
      • Refutation
        • Q(h);XB(A)
  • Actual
    • S(D);N_PINR(e)
    • Threat
      • B(A)+R(E),DCHECK
    • Vars
      • K(d);S_FLIGHT,XR(H)::B(A)+R(E),DCHECK
      • Q(h);N_GUARD,XB(A)::S(D)
      • B(b);N_GUARD,P_PINR(E)::R1(H)
      • R(e);::QAR(G)+S(D),DCHECK
      • B(b);N_GUARD,P_PINB(B),P_PINR(E)::R1(H)
      • B(b);OGATE,P_PINR(E)::B(A)+R(E)
      • B(b);P_PINR(E),SBLOCK::B(A)+R(E),DCHECK
      • B(b);N_GUARD,P_PINR(E),P_PINS(F)::R1(H),XB(b)
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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).