MESON Chess Problem Database

Problem Display
PID: 233476 (5nB1/2B3Nb/3P2p1/P1k2qRR/Qpp5/4PP2/7p/2n4K w - - 0 1)

Rosenthal, Moisej Schlemowitsch

Freie Presse, 1972

5nB1/2B3Nb/3P2p1/P1k2qRR/Qpp5/4PP2/7p/2n4K

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxd5#
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qxg5
      • 2.Rxg5#
    • 1...b3
      • 2.Qxc4#
  • Tries
    • 1.Se6+?
      • 1...Kd5
        • 2.Qb5#
      • 1...Sxe6!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qc6#
      • 1...Qxf3+
        • 2.Bxf3#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Qxd5
        • 2.Rxd5#
      • 1...Qd7
        • 2.Be6#
      • 1...b3
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE,P_PINP(C)::R1(F),XQ(f)
    • Q(f);OGATE::R(F),XQ(f)
    • Q(f);OGATE,XR(F)::R(G),XQ(f)
    • P(c);OGATE::QAR1(D),XP(d)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR2(D)
      • Refutation
        • S(i);XS(J)
  • Actual
    • B(K);N_PINQ(f)
    • Threat
      • QAR1(D)
    • Vars
      • Q(f);CHECK,OGATE,XP(C)::R(F)+B(K),XQ(f)
      • K(e);P-FLIGHT,P_SPINQ(f),XB(K)::QAR2(D)
      • Q(f);OGATE,P_PINP(C),P_SPINQ(f),XB(K)::R1(F),XQ(f)
      • Q(f);OGATEB::R(F)+B(K)
      • P(c);OGATE::QAR1(D),XP(d)
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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).