MESON Chess Problem Database

Problem Display
PID: 66627 (4b1B1/2p3n1/2pP3R/4NRp1/2pPk1p1/n3P1p1/K3Q3/8 w - - 0 1)

Narayanan, Chithathuz Gopatan Sathya

2nd Prize, Best Problems, 1998-2000

4b1B1/2p3n1/2pP3R/4NRp1/2pPk1p1/n3P1p1/K3Q3/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qxg4#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.e4#
      • 1...Sxf5
        • 2.Sc5#
      • 1...cxd6!
    • 1.Sxc4?
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Qd3#
      • 1...Sxf5
        • 2.Sd2#
      • 1...cxd6
        • 2.Sxd6#
      • 1...Sxc4!
    • 1.Sxg4?
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Qf3#
      • 1...Sxf5
        • 2.Sf6#
      • 1...cxd6!
    • 1.Bxc4?
      • threat
        • 2.Qd3#
      • 1...Kxf5
        • 2.Bd3#
        • 2.Qd3#
        • 2.Qxg4#
      • 1...Sxc4!
    • 1.Bd5+?
      • 1...Kxd5
        • 2.Qg2#
      • 1...Kxf5
        • 2.Qf1#
        • 2.Qxg4#
      • 1...cxd5!
    • 1.Rh4?
      • threat
        • 2.Qf3#
      • 1...gxh4
        • 2.Rf4#
      • 1...Kxf5!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Bh7#
      • 1...Sxf5
        • 2.Sxg5#
      • 1...cxd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);S_FLIGHT,XR(F)::QAB1(B),XP(e)
    • P(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • K(d);OGATE,S_FLIGHT,XR(F)::P(C)
        • S(i);SBLOCK,XR(F)::S(E)
      • Refutation
        • P(h);XP(G)
    • Try
      • S(E);XP(c)
      • Threat
        • R1(F)
      • Vars
        • K(d);S_FLIGHT,XR(F)::QAB(B)
        • S(i);SBLOCK,XR(F)::S(E)
        • P(h);XP(G)::S(E),XP(h)
      • Refutation
        • S(a);XS(E)
    • Try
      • S(E);XP(e)
      • Threat
        • R1(F)
      • Vars
        • K(d);S_FLIGHT,XR(F)::QAR2(B)
        • S(i);SBLOCK,XR(F)::S(E)
      • Refutation
        • P(h);XP(G)
    • Try
      • B(I);XP(c)
      • Threat
        • QAB1(B)
      • Refutation
        • S(a);XB(I)
    • Try
      • B(I);CHECK
      • Vars
        • K(d);S_FLIGHT,XB(I)::QAB(B)
      • Refutation
        • P(g);XB(I)
    • Try
      • R(H);P_PINP(e)
      • Threat
        • QAB1(B)
      • Vars
        • P(f);N_GUARD,N_SPINP(e),XR(H)::R1(F)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT,XR(F)
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(F)::B(I)
      • S(i);SBLOCK,XR(F)::S(E),XP(f)
      • P(h);XP(G)::S(E),XP(h)
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