MESON Chess Problem Database

Problem Display
PID: 46465 (1b4QB/7p/5P2/1N3k2/5P1q/Kn1P1R1P/4R3/2n2B2 w - - 0 1)

Subrahmanyam, Swaminatha

1st Prize, BCPS Ring Ty., 1959

(First published on Thu Dec 10 1959)

1b4QB/7p/5P2/1N3k2/5P1q/Kn1P1R1P/4R3/2n2B2

#2

11 + 6

236 The Field 1961
3749 FIDE Album (1959-1961) 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qxh7#
      • 2.Qg4#
      • 2.Qg5#
    • 1...Qf2
      • 2.Qxh7#
      • 2.Qg4#
      • 2.Qg5#
    • 1...Qg5
      • 2.Qxg5#
    • 1...Qxf6
      • 2.Qg4#
    • 1...Qxh3
      • 2.Bxh3#
      • 2.Qg5#
    • 1...Qxf4
      • 2.Qg4#
    • 1...Qg4
      • 2.Qxg4#
      • 2.hxg4#
    • 1...Qh6
      • 2.Qg4#
    • 1...Bxf4
      • 2.Sd6#
    • 1...Be5
      • 2.Rxe5#
    • 1...Bd6+
      • 2.Sxd6#
    • 1...Ba7
      • 2.Sd6#
      • 2.Re5#
    • 1...Sa1
      • 2.Sd4#
    • 1...Sd2
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sa5
      • 2.Sd4#
    • 1...Sc5
      • 2.Sd4#
    • 1...h5
      • 2.Qh7#
    • 1...h6
      • 2.Qh7#
  • Tries
    • 1.Rg2?
      • threat
        • 2.Qc8#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Qxf6
        • 2.Qg4#
      • 1...Qxf4
        • 2.Rg5#
      • 1...Bxf4
        • 2.Qd5#
      • 1...Sxd3
        • 2.Bxd3#
      • 1...Qe1
        • 2.Rg5#
        • 2.Qg4#
      • 1...Qg5
        • 2.Rxg5#
      • 1...Qg4
        • 2.Qxg4#
        • 2.hxg4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sc5
        • 2.Sd4#
      • 1...Qg3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qe4#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Qxh3
        • 2.Bxh3#
      • 1...Qxf4
        • 2.Qh5#
      • 1...Bxf4
        • 2.Re5#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sd2
        • 2.Sd4#
      • 1...Sc5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::QAR1(J),XQ(c)
    • Q(c);N_GUARD,XP(I)::QAB1(J)
    • Q(c);N_GUARD,P_SPINQ(c),XP(G)::QAB1(J)
    • Q(c);N_GUARD::QAB1(J)
    • B(f);N_GUARD,P_SPINB(f),XP(G)::S(H)
    • B(f);N_GUARD::R1(B),XB(f)
    • B(f);CHECK,N_GUARD::S(H),XB(f)
    • S(b);N_GUARD::S(H)
    • S(b);N_GUARD::S(H),XS(b)
    • P(e);S_CUTQ(c)::QAB(J)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB(J)
      • Vars
        • B(f);CHECK,N_GUARD::S(H),XB(f)
        • Q(c);N_GUARD,XP(I)::QAB1(J)
        • Q(c);N_GUARD,P_SPINQ(c),XP(G)::R1(B)
        • B(f);N_GUARD,P_SPINB(f),XP(G)::QAR2(J)
        • S(a);OGATE,XP(D)::B(A),XS(a)
        • Q(c);N_GUARD::R1(B),XQ(c)
        • S(b);N_GUARD::S(H),XS(b)
        • S(b);N_GUARD::S(H)
      • Refutation
        • Q(c);
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • B(f);CHECK,N_GUARD::S(H),XB(f)
      • Q(c);OGATE,XP(F)::B(A),XQ(c)
      • Q(c);N_GUARD,P_SPINQ(c),XP(G)::QAR2(J)
      • B(f);N_GUARD,P_SPINB(f),XP(G)::R1(B)
      • B(f);N_GUARD::R1(B),XB(f)
      • S(b);N_GUARD::S(H)
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