MESON Chess Problem Database

Problem Display
PID: 51537 (nn1R1B2/1Bbq4/r1P1N3/1p1kpKR1/3P4/1N1P1p2/Q7/2r5 w - - 0 1)

Parthasarathy, Dr Mukkur

Subrahmanyam, Swaminatha

The Guardian, 1963

nn1R1B2/1Bbq4/r1P1N3/1p1kpKR1/3P4/1N1P1p2/Q7/2r5

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sa5#
    • 1...Re1
      • 2.Sa5#
    • 1...Rf1
      • 2.Sa5#
    • 1...Rg1
      • 2.Sa5#
    • 1...Rh1
      • 2.Sa5#
    • 1...Rcxc6
      • 2.Sa5#
    • 1...Rb6
      • 2.Sxc1#
    • 1...Raxc6
      • 2.Sxc1#
    • 1...Ba5
      • 2.Sxc1#
  • Tries
    • 1.Rxd7+?
      • 1...Bd6
        • 2.Rxd6#
      • 1...Sxd7!
    • 1.cxd7+?
      • 1...Rcc6
        • 2.Sa5#
      • 1...Rac6
        • 2.Sxc1#
      • 1...Sc6!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Sf4#
      • 1...Kxe6
        • 2.Sc5#
      • 1...Rcxc6
        • 2.Sa5#
      • 1...Raxc6
        • 2.Sxc1#
      • 1...Qd6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAB(A)+S(B)
    • R(a);N_GUARD,P_SPINR(a),XP(G)::QAB(A)+S(B)
    • R(f);N_GUARD::QAB(A)+S(B),XR(a)
    • R(f);N_GUARD,P_SPINR(f),XP(G)::QAB(A)+S(B),XR(a)
    • B(g);S_CUTR(f)::QAB(A)+S(B),XR(a)
  • Tries
    • Try
      • R(J);CHECK,N_SPINS(H),XQ(h)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::R1(J),XB(g)
      • Refutation
        • S(j);XR(J)
    • Try
      • P(G);CHECK,N_SPINS(H),XQ(h)
      • Vars
        • R(a);P_SPINR(a)::QAB(A)+S(B)
        • R(f);P_SPINR(f)::QAB(A)+S(B),XR(a)
      • Refutation
        • S(j);P_SPINS(j)
  • Actual
    • K(E);N_SPINS(H),P_PINP(e),S_FLIGHT
    • Threat
      • S(H)
    • Vars
      • K(d);N_SPINP(e),N_SPINQ(h),S_FLIGHT,XS(H)::QAB(A)+S(B),DCHECK
      • R(a);N_GUARD,P_PINS(H),P_SPINR(a),XP(G)::QAB(A)+S(B)
      • R(f);N_GUARD,P_PINS(H),P_SPINR(f),XP(G)::QAB(A)+S(B),XR(a)
      • Q(h);P_PINS(H),S_CUTB(g)::R1(F),XP(e)
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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).