MESON Chess Problem Database

Problem Display
PID: 73189 (3b4/qp1QnK2/1rp1N2B/8/p2Pk1B1/5NP1/b1P1nrP1/3R4 w - - 0 1)

Loshinski, Lev Ilich

Mussuri, Petr Stepanovich

5th HM., Moscow Ty., 1936

3b4/qp1QnK2/1rp1N2B/8/p2Pk1B1/5NP1/b1P1nrP1/3R4

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Sd2#
    • 1...Rxf3+
      • 2.gxf3#
    • 1...Bb1
      • 2.Sc5#
    • 1...Bxe6+
      • 2.Qxe6#
    • 1...Sxd4
      • 2.Rxd4#
      • 2.Qxd4#
    • 1...Sd5
      • 2.Sc5#
    • 1...Sf5
      • 2.Sd2#
  • Tries
    • 1.Bf5+?
      • 1...Sxf5
        • 2.Sd2#
      • 1...Kxf5!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Re3#
      • 1...Rxf3+
        • 2.gxf3#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Rb3
        • 2.Sg5#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sd5
        • 2.Sc5#
      • 1...Sf5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);N_PINS(D),P_PINS(H),XP(C)::S(D)
    • R(c);CHECK,OGATE,P_PINS(H),XS(D)::P(C),XR(c)
    • B(a);::S(H)
    • B(a);CHECK,OGATE,XS(H)::QAR2(J),XB(a)
    • S(j);::S(H)
    • S(j);N_PINS(D),P_PINS(H)::S(D)
  • Tries
    • Try
      • B(G);CHECK,N_SPINS(D),P_SPINS(H)
      • Vars
        • S(j);SBLOCK,XB(G)::S(D)
      • Refutation
        • K(e);S_FLIGHT,XB(G)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • R(c);CHECK,OGATE,P_PINS(H),XS(D)::P(C),XR(c)
      • B(a);CHECK,OGATE,XS(H)::QAR2(J),XB(a)
      • R(f);::S(H)
      • S(b);N_PINS(D),P_PINS(H)::S(D)
      • S(j);::S(H)
      • S(j);N_PINS(D),P_PINS(H)::S(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).