MESON Chess Problem Database

Problem Display
PID: 103665 (1BK5/R2N2Q1/1Pp4p/1pNk1bnR/1Pr5/3n1p2/B4P2/8 w - - 0 1)

Narayanan, Chithathuz Gopatan Sathya

Northwest Chess, 1977

1BK5/R2N2Q1/1Pp4p/1pNk1bnR/1Pr5/3n1p2/B4P2/8

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd7+
      • 2.Rxd7#
      • 2.Qxd7#
    • 1...Sc1
      • 2.Qe5#
    • 1...Se1
      • 2.Qe5#
    • 1...Sb2
      • 2.Qe5#
    • 1...Sxf2
      • 2.Qe5#
    • 1...Sxb4
      • 2.Qe5#
    • 1...Sf4
      • 2.Qe5#
    • 1...Sxc5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qd6#
      • 1...Bxd7+
        • 2.Rxd7#
        • 2.Qxd7#
      • 1...Sxc5
        • 2.Qe5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Kd4!
  • Keys
    • 1.Qc3!
      • 1...Bxd7+
        • 2.Rxd7#
      • 1...Sxf2
        • 2.Qe5#
      • 1...Sxb4
        • 2.Qe5#
      • 1...Sxc5
        • 2.Qe5#
      • 1...Be4
        • 2.Sf6#
      • 1...Bh3
        • 2.Qxd3#
      • 1...Bg4
        • 2.Qxd3#
      • 1...Be6
        • 2.Qxd3#
      • 1...Bg6
        • 2.Sf6#
      • 1...Bh7
        • 2.Sf6#
      • 1...Sc1
        • 2.Qe5#
      • 1...Se1
        • 2.Qe5#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sh3
        • 2.Qxd3#
      • 1...Se4
        • 2.Qxd3#
      • 1...Se6
        • 2.Sf6#
      • 1...Sf7
        • 2.Qxd3#
      • 1...Sh7
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(I)
    • S(a);N_GUARD,XP(B)::QAR1(I)
    • S(a);N_GUARD,XP(C)::QAR1(I)
    • S(a);N_GUARD,XS(D)::QAR1(I)
    • S(a);N_GUARD::QAR1(I),XS(a)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • S(a);N_GUARD,XS(D)::QAR1(I)
        • S(g);N_GUARD,P_SPINB(f)::QAB1(I),XS(g)
        • S(g);N_GUARD,P_SPINB(f)::QAB1(I)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
  • Actual
    • Q(I);
    • Vars
      • B(f);CHECK,OGATE,P_SPINS(g),XS(H)::R(G),XB(f)
      • S(a);N_GUARD,XP(B)::QAR1(I)
      • S(a);N_GUARD,XP(C)::QAR1(I)
      • S(a);N_GUARD,XS(D)::QAR1(I)
      • B(f);N_PINS(H),P_SPINS(g)::S(H)
      • B(f);N_GUARD,P_SPINS(g)::QAR2(I),XS(a)
      • S(a);N_GUARD::QAR1(I)
      • S(a);N_GUARD::QAR1(I),XS(a)
      • S(g);P_SPINB(f)::QAR2(I),XS(a)
      • S(g);N_PINS(H),P_SPINB(f)::S(H)
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