MESON Chess Problem Database

Problem Display
PID: 51560 (b1B5/pnBQp3/kr2N1Kp/6bR/2p2p1p/2N2P1P/1n6/8 w - - 0 1)

Subrahmanyam, Swaminatha

The Guardian, 1964

b1B5/pnBQp3/kr2N1Kp/6bR/2p2p1p/2N2P1P/1n6/8

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qb5#
    • 1...Rb3
      • 2.Sc5#
    • 1...Rb4
      • 2.Sc5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Rc6
      • 2.Qxc6#
    • 1...Rd6
      • 2.Qb5#
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Sd1
      • 2.Qa4#
    • 1...Sd3
      • 2.Qa4#
    • 1...Sa4
      • 2.Qxa4#
  • Tries
    • 1.Kf5?
      • 1...Rb5+
        • 2.Qxb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Rxe6
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Sc5#
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa4#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Qxa4#
      • 1...Bf6!
    • 1.Kf7?
      • 1...Ka5
        • 2.Qb5#
      • 1...Rxe6
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Sc5#
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa4#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Qxa4#
      • 1...Bf6!
    • 1.Kg7?
      • 1...Ka5
        • 2.Qb5#
      • 1...Rxe6
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Sc5#
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa4#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Qxa4#
      • 1...Bf6+!
    • 1.Kh7?
      • 1...Ka5
        • 2.Qb5#
      • 1...Rxe6
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Rb3
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Sc5#
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa4#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Qxa4#
      • 1...Bf6!
    • 1.Bxb6?
      • threat
        • 2.Qb5#
      • 1...Kxb6
        • 2.Qb5#
      • 1...axb6!
  • Keys
    • 1.Bd8!
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Ka5
        • 2.Qb5#
      • 1...Bf6
        • 2.Sc7#
      • 1...Rb3
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Qb5#
      • 1...Sd1
        • 2.Qa4#
      • 1...Sd3
        • 2.Qa4#
      • 1...Sa4
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINS(j),P-FLIGHT,P_SPINB(e),P_SPINR(g)::QAR1(H)
    • R(g);N_PINS(E)::S(E)
    • R(g);N_GUARD,N_PINS(E)::QAB1(H),XR(g)
    • R(g);OGATEB::QAR2(H),XR(g)
    • R(g);N_GUARD::QAB1(H)
    • R(g);CHECK,OGATE,XS(E)::QAR(H),XR(g)
    • S(a);N_GUARD::QAR2(H)
    • S(a);N_GUARD::QAR2(H),XS(a)
  • Tries
    • Try
      • K(F);N_SPINS(E),S_FLIGHT
      • Vars
        • R(g);CHECK,N_GUARD::QAB1(H),XR(g)
        • K(f);N_SPINS(j),P-FLIGHT,P_SPINR(g)::QAR1(H)
        • R(g);::S(E)
        • R(g);OGATEB::QAR2(H),XR(g)
        • S(a);N_GUARD::QAR2(H)
        • S(a);N_GUARD::QAR2(H),XS(a)
      • Refutation
        • B(e);
    • Try
      • K(F);N_SPINS(E),S_FLIGHT
      • Vars
        • K(f);N_SPINS(j),P-FLIGHT,P_SPINB(e),P_SPINR(g)::QAR1(H)
        • R(g);::S(E)
        • R(g);N_GUARD::QAB1(H),XR(g)
        • R(g);OGATEB::QAR2(H),XR(g)
        • S(a);N_GUARD::QAR2(H)
        • S(a);N_GUARD::QAR2(H),XS(a)
      • Refutation
        • B(e);
    • Try
      • K(F);N_SPINS(E),P-FLIGHT
      • Vars
        • K(f);N_SPINS(j),P-FLIGHT,P_SPINB(e),P_SPINR(g)::QAR1(H)
        • R(g);::S(E)
        • R(g);N_GUARD::QAB1(H),XR(g)
        • R(g);OGATEB::QAR2(H),XR(g)
        • S(a);N_GUARD::QAR2(H)
        • S(a);N_GUARD::QAR2(H),XS(a)
      • Refutation
        • B(e);CHECK
    • Try
      • K(F);N_SPINS(E),S_FLIGHT
      • Vars
        • K(f);N_SPINS(j),P-FLIGHT,P_SPINB(e),P_SPINR(g)::QAR1(H)
        • R(g);::S(E)
        • R(g);N_GUARD::QAB1(H),XR(g)
        • R(g);OGATEB::QAR2(H),XR(g)
        • S(a);N_GUARD::QAR2(H)
        • S(a);N_GUARD::QAR2(H),XS(a)
      • Refutation
        • B(e);
    • Try
      • B(G);N_SPINS(E),XR(g)
      • Threat
        • QAB1(H)
      • Vars
        • K(f);N_SPINS(j),P-FLIGHT,XB(G)::QAR1(H)
      • Refutation
        • P(i);XB(G)
  • Actual
    • B(G);
    • Vars
      • R(g);CHECK,OGATE,XS(E)::QAR(H),XR(g)
      • K(f);N_SPINS(j),P-FLIGHT,P_SPINB(e),P_SPINR(g)::QAR1(H)
      • B(e);N_PINS(E)::S(E)
      • R(g);N_PINS(E)::S(E)
      • R(g);N_GUARD,N_PINS(E)::QAB1(H),XR(g)
      • R(g);OGATEB::QAR2(H),XR(g)
      • R(g);N_GUARD::QAB1(H)
      • S(a);N_GUARD::QAR2(H)
      • S(a);N_GUARD::QAR2(H),XS(a)
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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).