MESON Chess Problem Database

Problem Display
PID: 272671 (3q2r1/2BN3n/6B1/2p1NPR1/3p1k1r/3P3P/8/5KQn w - - 0 1)

Subrahmanyam, Swaminatha

The Problemist, 1957

3q2r1/2BN3n/6B1/2p1NPR1/3p1k1r/3P3P/8/5KQn

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh3
      • 2.Rg4#
    • 1...Rg4
      • 2.Rxg4#
    • 1...Rh5
      • 2.Rg4#
    • 1...Rh6
      • 2.Rg4#
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3+
      • 2.Qxg3#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qc1#
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Qxg5
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sf7#
      • 1...Rxh3
        • 2.Rg4#
        • 2.Qg4#
      • 1...Rg4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Sxg5!
    • 1.Sc4+?
      • 1...Kf3
        • 2.Sd2#
        • 2.Qxh1#
        • 2.Qg2#
      • 1...Qxc7!
    • 1.Qf2+?
      • 1...Kxg5
        • 2.Sf7#
      • 1...Sxf2!
    • 1.Qh2+?
      • 1...Kxg5
        • 2.Sf7#
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Ke3!
    • 1.Qxd4+?
      • 1...Kxg5
        • 2.Sf7#
      • 1...cxd4!
  • Keys
    • 1.Kg2!
      • threat
        • 2.Qc1#
      • 1...Qxg5+
        • 2.Sg4#
      • 1...Qa8+
        • 2.Sf3#
      • 1...Rg4+
        • 2.Rxg4#
      • 1...Kxg5
        • 2.Sf7#
      • 1...Rxh3
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD,XP(D)::R1(G)
    • R(d);N_GUARD::R1(G),XR(d)
    • R(d);N_GUARD::R1(G)
    • S(a);N_GUARD::QAB1(B)
    • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB(B)
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
      • Refutation
        • S(f);XR(G)
    • Try
      • S(E);CHECK
      • Refutation
        • Q(g);XB(I)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(G)::S(E)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XR(G)::S(E)
        • S(a);CHECK,N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XR(G)::S(E)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • QAB(B)
    • Vars
      • Q(g);CHECK,N_GUARD,SBLOCK,XR(G)::B(I)+S(E)
      • Q(g);CHECK,N_GUARD::B(I)+S(E)
      • R(d);CHECK,N_GUARD::R1(G),XR(d)
      • K(c);S_CUTQ(g),S_FLIGHT,XR(G)::S(E)
      • R(d);N_GUARD,XP(D)::R1(G)
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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).