MESON Chess Problem Database

Problem Display
PID: 51506 (3K4/1P2pN2/6R1/5n2/Rb3kp1/3Q2p1/1r1r2P1/2B5 w - - 0 1)

Subrahmanyam, Swaminatha

The Guardian, 1962

3K4/1P2pN2/6R1/5n2/Rb3kp1/3Q2p1/1r1r2P1/2B5

#2

8 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Bxd2+?
      • 1...Se3
        • 2.Bxe3#
      • 1...Rxd2!
    • 1.Rxb4+?
      • 1...Sd4
        • 2.Rxd4#
      • 1...Rxb4!
    • 1.Rf6?
      • threat
        • 2.Rxf5#
        • 2.Qd4#
      • 1...e5
        • 2.Rxf5#
      • 1...e6
        • 2.Qd4#
      • 1...exf6!
    • 1.b8Q+?
      • 1...e5
        • 2.Qxe5#
      • 1...Sd6!
    • 1.b8B+?
      • 1...e5
        • 2.Bxe5#
      • 1...Sd6!
  • Keys
    • 1.Re6!
      • threat
        • 2.Re4#
      • 1...Se3
        • 2.b8Q#
        • 2.b8B#
      • 1...Sd4
        • 2.Qe4#
      • 1...Sh4
        • 2.b8Q#
        • 2.b8B#
      • 1...Sd6
        • 2.Qf1#
      • 1...Sh6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sg7
        • 2.b8Q#
        • 2.b8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(C),XR(b)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::B(A),XS(g)
      • Refutation
        • R(a);P_PINQ(C),XB(A)
    • Try
      • R(D);CHECK,XB(d)
      • Vars
        • S(g);N_GUARD,N_PINQ(C),P_SPINS(g)::R(D),XS(g)
      • Refutation
        • R(a);XR(D)
    • Try
      • R(E);P_PINS(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::R1(E),XS(g)
        • P(h);::QAR2(C)
      • Refutation
        • P(h);N_SPINS(g),XR(E)
    • Try
      • P(F);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAB1(F),XP(h)
      • Refutation
        • S(g);N_PINQ(C),P_SPINS(g)
    • Try
      • P(F);CHECK
      • Vars
        • P(h);P_SPINP(h)::B(F),XP(h)
      • Refutation
        • S(g);N_PINQ(C),P_SPINS(g)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • S(g);N_GUARD,N_SPINR(b)::P=Q
      • S(g);N_PINQ(C),N_SPINB(d)::QAR1(C)
      • S(g);N_GUARD::P=Q
      • S(g);N_PINQ(C)::QAR(C)
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