MESON Chess Problem Database

Problem Display
PID: 87717 (2r4q/N2b4/r3p3/p3n2Q/RPkn4/1pN1pBb1/1BpRP1K1/8 w - - 0 1)

Parthasarathy, Dr Mukkur

1st Comm., The Problemist, 1992

2r4q/N2b4/r3p3/p3n2Q/RPkn4/1pN1pBb1/1BpRP1K1/8

#2

10 + 13

6490 yacpdb 2009
136 Problem Observer 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.b5#
    • 1...Sd3
      • 2.exd3#
    • 1...Sxf3
      • 2.b5#
    • 1...Sg4
      • 2.b5#
    • 1...Sc6
      • 2.Qc5#
    • 1...Sg6
      • 2.b5#
    • 1...Sf7
      • 2.b5#
  • Tries
    • 1.bxa5+?
      • 1...Kc5
        • 2.Ba3#
      • 1...Bxa4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Rxd4#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Rxa7
        • 2.Sd6#
      • 1...Sxe2
        • 2.b5#
      • 1...Sdxf3
        • 2.b5#
      • 1...Sexf3
        • 2.b5#
      • 1...exd2
        • 2.Sxd2#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Sb5
        • 2.bxa5#
      • 1...Sf5
        • 2.b5#
      • 1...Sdc6
        • 2.Sd6#
      • 1...Sd3
        • 2.exd3#
      • 1...Sg4
        • 2.b5#
      • 1...Sec6
        • 2.Qc5#
      • 1...Sg6
        • 2.b5#
      • 1...Sf7
        • 2.b5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • R(l);SBLOCK::R(G)+P(H)
    • S(h);OGATE::P(C),XS(h)
    • S(h);XB(F)::R(G)+P(H)
    • S(h);::R(G)+P(H)
    • S(h);OGATE::QAR1(I)
  • Tries
    • Try
      • P(H);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(h)::B(A)
      • Refutation
        • B(k);XR(G)
  • Actual
    • S(E);
    • Threat
      • R1(B),XS(f)
    • Vars
      • K(e);P_SPINS(f),S_FLIGHT::R1(B),XS(f)
      • R(i);N_GUARD,XS(J)::S(E)
      • S(f);XP(C)::R(G)+P(H)
      • S(f);XB(F)::R(G)+P(H)
      • S(h);XB(F)::R(G)+P(H)
      • P(c);XR(B)::S(E),XP(c)
      • R(i);N_GUARD::S(E),XR(i)
      • S(f);S_CUTB(k)::R(G)+P(H),XP(g)
      • S(f);::R(G)+P(H)
      • S(f);S_CUTR(i)::S(E)
      • S(h);OGATE::P(C),XS(h)
      • S(h);::R(G)+P(H)
      • S(h);OGATE::QAR1(I)
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