MESON Chess Problem Database

Problem Display
PID: 249302 (3b1R1B/1K1N1n2/pP1p4/3k4/r3Np2/QP2PP1B/4n3/3q4 w - - 0 1)

Balasubramaniam, SK

The Problemist, 1990

3b1R1B/1K1N1n2/pP1p4/3k4/r3Np2/QP2PP1B/4n3/3q4

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qa5#
    • 1...Rxe4
      • 2.Qa5#
    • 1...Ra5
      • 2.Qxa5#
    • 1...Bxb6
      • 2.Sef6#
      • 2.Sxb6#
    • 1...Bf6
      • 2.Sexf6#
    • 1...Bc7
      • 2.Sef6#
    • 1...Sc1
      • 2.Sc3#
    • 1...Sg1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg3
      • 2.Sc3#
    • 1...Sd4
      • 2.Sc3#
    • 1...Se5
      • 2.Qxd6#
    • 1...Sg5
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qxd6#
    • 1...Sxh8
      • 2.Qxd6#
  • Tries
    • 1.Sdc5?
      • threat
        • 2.Be6#
      • 1...Rxe4
        • 2.fxe4#
      • 1...Sxh8
        • 2.Rf5#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sg5
        • 2.Rf5#
      • 1...Bf6!
    • 1.Re8?
      • threat
        • 2.Be6#
      • 1...Rxe4
        • 2.Qa5#
        • 2.fxe4#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sg5
        • 2.Qxd6#
      • 1...Be7!
  • Keys
    • 1.Sec5!
      • threat
        • 2.Be6#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Re4
        • 2.fxe4#
      • 1...Sd4
        • 2.e4#
      • 1...Sg5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(c);OGATE::QAR(A)
    • R(c);OGATE,XS(F)::QAR(A)
    • R(c);OGATE::QAR(A),XR(c)
    • B(i);N_GUARD::S(F),XB(i)
    • B(i);N_GUARD::S(F)
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
    • S(h);N_GUARD::QAR1(A),XP(g)
    • S(h);N_GUARD,XB(K)::QAR1(A),XP(g)
  • Tries
    • Try
      • S(I);
      • Threat
        • B(E)
      • Vars
        • R(c);OGATE,XS(F)::P(D),XR(c)
        • S(h);OGATE,XB(K)::R(J)
        • P(g);OGATE,XS(I)::QAR1(A),XP(g)
        • S(b);N_GUARD::S(F)
        • S(h);OGATE::R(J)
      • Refutation
        • B(i);
    • Try
      • R(J);
      • Threat
        • B(E)
      • Vars
        • S(b);N_GUARD::S(F)
        • S(h);N_GUARD::QAR1(A),XP(g)
      • Refutation
        • B(i);
  • Actual
    • S(F);
    • Threat
      • B(E)
    • Vars
      • P(g);OGATE,XS(F)::QAR1(A),XP(g)
      • R(c);OGATE::P(D),XR(c)
      • S(b);S_CUTR(c)::P(C)
      • S(h);OGATE::R(J)
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