MESON Chess Problem Database

Problem Display
PID: 136222 (1B6/2R1N1Kp/8/3PR3/3k2nr/1p1n4/8/bb1QNB1q w - - 0 1)

Subrahmanyam, Swaminatha

4th Prize, BCF 101. Ty., 1962-1963

1B6/2R1N1Kp/8/3PR3/3k2nr/1p1n4/8/bb1QNB1q

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Rc4#
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qg1
      • 2.Sf3#
    • 1...Qh2
      • 2.Sf3#
  • Tries
    • 1.Qxg4+?
      • 1...Kxe5
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Rc5#
        • 2.Rc6#
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rd7#
        • 2.Rc8#
      • 1...Qe4
        • 2.Rxe4#
      • 1...Sf4
        • 2.Rc4#
      • 1...Rxg4+!
    • 1.Qxd3+?
      • 1...Kxe5
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Rc5#
        • 2.Rc6#
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rd7#
        • 2.Rc8#
      • 1...Bxd3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Re4#
      • 1...Kxe5
        • 2.Rc4#
      • 1...Qxf3
        • 2.Sxf3#
      • 1...Sxe1
        • 2.Rc4#
      • 1...Sdxe5
        • 2.Ba7#
      • 1...Sgxe5
        • 2.Sf5#
      • 1...Sc1
        • 2.Rc4#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sdf2
        • 2.Rc4#
      • 1...Sb4
        • 2.Rc4#
      • 1...Sf4
        • 2.Rc4#
      • 1...Sc5
        • 2.Sc6#
      • 1...Sgf2
        • 2.Qe3#
      • 1...Sh2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf6
        • 2.Qe3#
      • 1...Sh6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 2
  • Sets
    • K(f);N_SPINS(e),S_FLIGHT,XR(E)::B(I)+R(F)
    • Q(c);N_GUARD::S(B),XQ(c)
    • Q(c);N_GUARD::S(B)
  • Tries
    • Try
      • Q(A);CHECK,N_PINS(e),XS(g)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::R1(E),XQ(c)
        • S(e);P_SPINS(e)::R1(F)
      • Refutation
        • R(h);CHECK,XQ(A)
    • Try
      • Q(A);CHECK,XS(e)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • Q(A);N_PINS(e)
    • Threat
      • R1(E)
    • Vars
      • K(f);S_FLIGHT,XR(E)::B(I)+R(F)
      • Q(c);XQ(A)::S(B),XQ(c)
      • S(e);XS(B)::R1(F)
      • S(e);N_GUARD,SBLOCK,XR(E)::B(I)
      • S(g);SBLOCK,XR(E)::S(G)
      • S(e);::R1(F)
      • S(e);OGATE::QAB1(A)
      • S(e);SBLOCK::S(G)
      • S(g);N_GUARD::QAB1(A)
      • S(g);N_GUARD::QAB1(A),XS(g)
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